./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl --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 7f3df0b4eae1d513bdc1ba52a53496aa05ff593bd28211e99c6fbfee672a86c9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:24:45,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:24:45,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:24:45,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:24:45,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:24:45,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:24:45,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:24:45,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:24:45,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:24:45,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:24:45,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:24:45,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:24:45,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:24:45,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:24:45,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:24:45,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:24:45,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:24:45,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:24:45,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:24:45,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:24:45,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:24:45,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:24:45,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:24:45,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:24:45,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:24:45,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:24:45,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:24:45,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:24:45,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:24:45,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:24:45,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:24:45,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:24:45,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:24:45,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:24:45,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:24:45,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:24:45,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:24:45,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:24:45,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:24:45,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:24:45,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:24:45,630 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:24:45,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:24:45,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:24:45,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:24:45,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:24:45,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:24:45,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:24:45,681 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:24:45,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:24:45,682 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:24:45,682 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:24:45,683 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:24:45,683 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:24:45,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:24:45,684 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:24:45,684 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:24:45,685 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:24:45,685 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:24:45,685 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:24:45,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:24:45,686 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:24:45,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:24:45,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:24:45,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:24:45,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:24:45,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:24:45,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:24:45,689 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:24:45,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:24:45,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:24:45,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:24:45,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:24:45,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:24:45,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:45,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:24:45,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:24:45,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:24:45,693 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:24:45,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:24:45,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:24:45,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:24:45,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:24:45,694 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_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f3df0b4eae1d513bdc1ba52a53496aa05ff593bd28211e99c6fbfee672a86c9 [2021-11-23 17:24:46,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:24:46,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:24:46,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:24:46,057 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:24:46,058 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:24:46,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-23 17:24:46,145 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/data/efef67627/39378033c23d4ae6894b19d95594984b/FLAG7408c0819 [2021-11-23 17:24:46,762 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:24:46,767 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-23 17:24:46,791 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/data/efef67627/39378033c23d4ae6894b19d95594984b/FLAG7408c0819 [2021-11-23 17:24:46,998 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/data/efef67627/39378033c23d4ae6894b19d95594984b [2021-11-23 17:24:47,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:24:47,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:24:47,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:47,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:24:47,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:24:47,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:46" (1/1) ... [2021-11-23 17:24:47,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13653d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:47, skipping insertion in model container [2021-11-23 17:24:47,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:46" (1/1) ... [2021-11-23 17:24:47,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:24:47,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:24:47,407 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[5819,5832] [2021-11-23 17:24:47,429 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[8492,8505] [2021-11-23 17:24:47,449 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[11299,11312] [2021-11-23 17:24:47,472 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[13874,13887] [2021-11-23 17:24:47,507 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[16880,16893] [2021-11-23 17:24:47,535 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[19470,19483] [2021-11-23 17:24:47,551 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[22230,22243] [2021-11-23 17:24:47,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:47,614 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:24:47,673 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[5819,5832] [2021-11-23 17:24:47,713 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[8492,8505] [2021-11-23 17:24:47,752 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[11299,11312] [2021-11-23 17:24:47,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[13874,13887] [2021-11-23 17:24:47,826 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[16880,16893] [2021-11-23 17:24:47,845 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[19470,19483] [2021-11-23 17:24:47,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[22230,22243] [2021-11-23 17:24:47,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:47,968 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:24:47,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:47 WrapperNode [2021-11-23 17:24:47,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:47,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:47,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:24:47,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:24:47,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:47" (1/1) ... [2021-11-23 17:24:48,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:47" (1/1) ... [2021-11-23 17:24:48,093 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1247 [2021-11-23 17:24:48,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:48,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:24:48,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:24:48,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:24:48,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:47" (1/1) ... [2021-11-23 17:24:48,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:47" (1/1) ... [2021-11-23 17:24:48,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:47" (1/1) ... [2021-11-23 17:24:48,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:47" (1/1) ... [2021-11-23 17:24:48,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:47" (1/1) ... [2021-11-23 17:24:48,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:47" (1/1) ... [2021-11-23 17:24:48,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:47" (1/1) ... [2021-11-23 17:24:48,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:24:48,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:24:48,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:24:48,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:24:48,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:47" (1/1) ... [2021-11-23 17:24:48,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:48,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:48,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:24:48,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:24:48,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:24:48,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:24:48,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:24:48,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:24:48,481 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:24:48,490 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:24:49,552 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:24:49,617 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:24:49,630 INFO L158 Benchmark]: Toolchain (without parser) took 2623.61ms. Allocated memory was 83.9MB in the beginning and 113.2MB in the end (delta: 29.4MB). Free memory was 47.9MB in the beginning and 58.0MB in the end (delta: -10.1MB). Peak memory consumption was 47.4MB. Max. memory is 16.1GB. [2021-11-23 17:24:49,630 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 83.9MB. Free memory was 55.8MB in the beginning and 55.7MB in the end (delta: 25.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:24:49,636 INFO L158 Benchmark]: CACSL2BoogieTranslator took 966.78ms. Allocated memory was 83.9MB in the beginning and 113.2MB in the end (delta: 29.4MB). Free memory was 47.7MB in the beginning and 70.3MB in the end (delta: -22.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:24:49,639 INFO L158 Benchmark]: Boogie Procedure Inliner took 120.92ms. Allocated memory is still 113.2MB. Free memory was 70.3MB in the beginning and 65.6MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 17:24:49,640 INFO L158 Benchmark]: Boogie Preprocessor took 81.71ms. Allocated memory is still 113.2MB. Free memory was 65.6MB in the beginning and 62.1MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 17:24:49,641 INFO L158 Benchmark]: RCFGBuilder took 1447.50ms. Allocated memory is still 113.2MB. Free memory was 62.1MB in the beginning and 58.0MB in the end (delta: 4.1MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. [2021-11-23 17:24:49,650 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 83.9MB. Free memory was 55.8MB in the beginning and 55.7MB in the end (delta: 25.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 966.78ms. Allocated memory was 83.9MB in the beginning and 113.2MB in the end (delta: 29.4MB). Free memory was 47.7MB in the beginning and 70.3MB in the end (delta: -22.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 120.92ms. Allocated memory is still 113.2MB. Free memory was 70.3MB in the beginning and 65.6MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 81.71ms. Allocated memory is still 113.2MB. Free memory was 65.6MB in the beginning and 62.1MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1447.50ms. Allocated memory is still 113.2MB. Free memory was 62.1MB in the beginning and 58.0MB in the end (delta: 4.1MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:24:49,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 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_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl --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 7f3df0b4eae1d513bdc1ba52a53496aa05ff593bd28211e99c6fbfee672a86c9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:24:52,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:24:52,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:24:52,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:24:52,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:24:52,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:24:52,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:24:52,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:24:52,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:24:52,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:24:52,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:24:52,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:24:52,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:24:52,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:24:52,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:24:52,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:24:52,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:24:52,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:24:52,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:24:52,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:24:52,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:24:52,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:24:52,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:24:52,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:24:52,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:24:52,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:24:52,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:24:52,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:24:52,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:24:52,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:24:52,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:24:52,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:24:52,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:24:52,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:24:52,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:24:52,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:24:52,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:24:52,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:24:52,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:24:52,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:24:52,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:24:52,480 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:24:52,522 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:24:52,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:24:52,523 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:24:52,523 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:24:52,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:24:52,524 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:24:52,525 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:24:52,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:24:52,525 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:24:52,525 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:24:52,526 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:24:52,526 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:24:52,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:24:52,527 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:24:52,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:24:52,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:24:52,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:24:52,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:24:52,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:24:52,528 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:24:52,528 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:24:52,529 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:24:52,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:24:52,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:24:52,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:24:52,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:24:52,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:24:52,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:24:52,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:24:52,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:52,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:24:52,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:24:52,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:24:52,531 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:24:52,532 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:52,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:24:52,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:24:52,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:24:52,532 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_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f3df0b4eae1d513bdc1ba52a53496aa05ff593bd28211e99c6fbfee672a86c9 [2021-11-23 17:24:52,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:24:52,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:24:52,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:24:52,973 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:24:52,974 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:24:52,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-23 17:24:53,062 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/data/a338f08d9/c6397549d9f94317b8d0eb529a687298/FLAG3afb64c46 [2021-11-23 17:24:53,800 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:24:53,801 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-23 17:24:53,818 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/data/a338f08d9/c6397549d9f94317b8d0eb529a687298/FLAG3afb64c46 [2021-11-23 17:24:54,027 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/data/a338f08d9/c6397549d9f94317b8d0eb529a687298 [2021-11-23 17:24:54,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:24:54,032 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:24:54,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:54,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:24:54,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:24:54,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:54,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37da92cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:54, skipping insertion in model container [2021-11-23 17:24:54,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:24:54" (1/1) ... [2021-11-23 17:24:54,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:24:54,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:24:54,438 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[5819,5832] [2021-11-23 17:24:54,471 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[8492,8505] [2021-11-23 17:24:54,517 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[11299,11312] [2021-11-23 17:24:54,557 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[13874,13887] [2021-11-23 17:24:54,578 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[16880,16893] [2021-11-23 17:24:54,596 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[19470,19483] [2021-11-23 17:24:54,615 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[22230,22243] [2021-11-23 17:24:54,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:54,704 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:24:54,757 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[5819,5832] [2021-11-23 17:24:54,793 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[8492,8505] [2021-11-23 17:24:54,842 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[11299,11312] [2021-11-23 17:24:54,864 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[13874,13887] [2021-11-23 17:24:54,889 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[16880,16893] [2021-11-23 17:24:54,908 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[19470,19483] [2021-11-23 17:24:54,930 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c[22230,22243] [2021-11-23 17:24:54,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:24:55,001 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:24:55,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:55 WrapperNode [2021-11-23 17:24:55,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:24:55,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:55,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:24:55,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:24:55,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:55" (1/1) ... [2021-11-23 17:24:55,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:55" (1/1) ... [2021-11-23 17:24:55,084 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1238 [2021-11-23 17:24:55,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:24:55,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:24:55,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:24:55,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:24:55,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:55" (1/1) ... [2021-11-23 17:24:55,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:55" (1/1) ... [2021-11-23 17:24:55,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:55" (1/1) ... [2021-11-23 17:24:55,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:55" (1/1) ... [2021-11-23 17:24:55,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:55" (1/1) ... [2021-11-23 17:24:55,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:55" (1/1) ... [2021-11-23 17:24:55,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:55" (1/1) ... [2021-11-23 17:24:55,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:24:55,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:24:55,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:24:55,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:24:55,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:55" (1/1) ... [2021-11-23 17:24:55,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:24:55,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:55,214 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:24:55,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:24:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:24:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:24:55,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:24:55,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:24:55,453 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:24:55,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:24:56,885 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:24:56,895 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:24:56,896 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 17:24:56,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:24:56 BoogieIcfgContainer [2021-11-23 17:24:56,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:24:56,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:24:56,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:24:56,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:24:56,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:24:54" (1/3) ... [2021-11-23 17:24:56,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8a0f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:24:56, skipping insertion in model container [2021-11-23 17:24:56,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:24:55" (2/3) ... [2021-11-23 17:24:56,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8a0f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:24:56, skipping insertion in model container [2021-11-23 17:24:56,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:24:56" (3/3) ... [2021-11-23 17:24:56,907 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2021-11-23 17:24:56,913 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:24:56,913 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-23 17:24:56,971 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:24:56,978 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 [2021-11-23 17:24:56,979 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-23 17:24:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 266 states, 258 states have (on average 1.8294573643410852) internal successors, (472), 265 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 17:24:57,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:57,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:24:57,017 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:24:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:57,022 INFO L85 PathProgramCache]: Analyzing trace with hash -102713619, now seen corresponding path program 1 times [2021-11-23 17:24:57,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:57,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936885547] [2021-11-23 17:24:57,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:57,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:57,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:57,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:57,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:24:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:24:57,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:57,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:57,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:57,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936885547] [2021-11-23 17:24:57,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936885547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:57,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:57,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:24:57,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822980957] [2021-11-23 17:24:57,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:57,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:24:57,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:57,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:24:57,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:24:57,928 INFO L87 Difference]: Start difference. First operand has 266 states, 258 states have (on average 1.8294573643410852) internal successors, (472), 265 states have internal predecessors, (472), 0 states have call successors, (0), 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 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:58,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:58,276 INFO L93 Difference]: Finished difference Result 355 states and 600 transitions. [2021-11-23 17:24:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:24:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-23 17:24:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:58,293 INFO L225 Difference]: With dead ends: 355 [2021-11-23 17:24:58,294 INFO L226 Difference]: Without dead ends: 226 [2021-11-23 17:24:58,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:24:58,302 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 51 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:58,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 874 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2021-11-23 17:24:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-23 17:24:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-11-23 17:24:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 219 states have (on average 1.264840182648402) internal successors, (277), 225 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 277 transitions. [2021-11-23 17:24:58,360 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 277 transitions. Word has length 47 [2021-11-23 17:24:58,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:58,361 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 277 transitions. [2021-11-23 17:24:58,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:58,361 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 277 transitions. [2021-11-23 17:24:58,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 17:24:58,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:58,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:24:58,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:58,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:58,578 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:24:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:58,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1933719334, now seen corresponding path program 1 times [2021-11-23 17:24:58,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:58,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111797844] [2021-11-23 17:24:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:58,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:58,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:58,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:58,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:24:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:58,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:24:58,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:59,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:59,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:59,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111797844] [2021-11-23 17:24:59,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111797844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:59,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:59,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:24:59,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065708509] [2021-11-23 17:24:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:59,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:24:59,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:59,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:24:59,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:24:59,116 INFO L87 Difference]: Start difference. First operand 226 states and 277 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:59,304 INFO L93 Difference]: Finished difference Result 309 states and 390 transitions. [2021-11-23 17:24:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:24:59,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-23 17:24:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:59,307 INFO L225 Difference]: With dead ends: 309 [2021-11-23 17:24:59,307 INFO L226 Difference]: Without dead ends: 218 [2021-11-23 17:24:59,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:24:59,310 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 12 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:59,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 419 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2021-11-23 17:24:59,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-23 17:24:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-23 17:24:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 211 states have (on average 1.2701421800947867) internal successors, (268), 217 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 268 transitions. [2021-11-23 17:24:59,327 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 268 transitions. Word has length 47 [2021-11-23 17:24:59,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:59,328 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 268 transitions. [2021-11-23 17:24:59,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:24:59,328 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 268 transitions. [2021-11-23 17:24:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 17:24:59,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:59,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:24:59,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:59,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:24:59,544 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:24:59,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:59,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2075615097, now seen corresponding path program 1 times [2021-11-23 17:24:59,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:59,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688252615] [2021-11-23 17:24:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:59,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:59,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:59,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:59,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:24:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:59,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:24:59,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:24:59,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:24:59,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:59,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688252615] [2021-11-23 17:24:59,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688252615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:24:59,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:24:59,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:24:59,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279266972] [2021-11-23 17:24:59,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:59,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:24:59,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:24:59,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:24:59,955 INFO L87 Difference]: Start difference. First operand 218 states and 268 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:00,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:00,164 INFO L93 Difference]: Finished difference Result 296 states and 374 transitions. [2021-11-23 17:25:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:25:00,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-23 17:25:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:00,166 INFO L225 Difference]: With dead ends: 296 [2021-11-23 17:25:00,167 INFO L226 Difference]: Without dead ends: 155 [2021-11-23 17:25:00,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:25:00,169 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 15 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:00,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 510 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2021-11-23 17:25:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-23 17:25:00,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-23 17:25:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 148 states have (on average 1.3175675675675675) internal successors, (195), 154 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:00,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 195 transitions. [2021-11-23 17:25:00,189 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 195 transitions. Word has length 47 [2021-11-23 17:25:00,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:00,190 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 195 transitions. [2021-11-23 17:25:00,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 195 transitions. [2021-11-23 17:25:00,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 17:25:00,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:00,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:00,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:25:00,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:00,400 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:00,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:00,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1498085814, now seen corresponding path program 1 times [2021-11-23 17:25:00,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:00,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223297218] [2021-11-23 17:25:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:00,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:00,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:00,403 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:00,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:25:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:00,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:25:00,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:01,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:01,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:01,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223297218] [2021-11-23 17:25:01,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223297218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:01,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:01,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:25:01,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640090359] [2021-11-23 17:25:01,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:01,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:25:01,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:25:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:01,508 INFO L87 Difference]: Start difference. First operand 155 states and 195 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:01,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:01,656 INFO L93 Difference]: Finished difference Result 162 states and 201 transitions. [2021-11-23 17:25:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:25:01,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-23 17:25:01,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:01,659 INFO L225 Difference]: With dead ends: 162 [2021-11-23 17:25:01,659 INFO L226 Difference]: Without dead ends: 157 [2021-11-23 17:25:01,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:25:01,660 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 32 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:01,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 651 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 138 Unchecked, 0.1s Time] [2021-11-23 17:25:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-23 17:25:01,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2021-11-23 17:25:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 148 states have (on average 1.3108108108108107) internal successors, (194), 154 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 194 transitions. [2021-11-23 17:25:01,681 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 194 transitions. Word has length 48 [2021-11-23 17:25:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:01,682 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 194 transitions. [2021-11-23 17:25:01,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 194 transitions. [2021-11-23 17:25:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 17:25:01,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:01,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:01,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:01,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:01,906 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:01,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:01,907 INFO L85 PathProgramCache]: Analyzing trace with hash 267052195, now seen corresponding path program 1 times [2021-11-23 17:25:01,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:01,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711715451] [2021-11-23 17:25:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:01,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:01,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:01,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:01,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:25:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:02,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:25:02,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:02,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:02,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:02,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711715451] [2021-11-23 17:25:02,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711715451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:02,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:02,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:25:02,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657262519] [2021-11-23 17:25:02,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:02,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:25:02,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:02,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:25:02,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:02,836 INFO L87 Difference]: Start difference. First operand 155 states and 194 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:02,856 INFO L93 Difference]: Finished difference Result 216 states and 281 transitions. [2021-11-23 17:25:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:25:02,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-23 17:25:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:02,859 INFO L225 Difference]: With dead ends: 216 [2021-11-23 17:25:02,859 INFO L226 Difference]: Without dead ends: 156 [2021-11-23 17:25:02,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:02,861 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 26 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:02,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 758 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 247 Unchecked, 0.0s Time] [2021-11-23 17:25:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-23 17:25:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-11-23 17:25:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 148 states have (on average 1.304054054054054) internal successors, (193), 154 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 193 transitions. [2021-11-23 17:25:02,871 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 193 transitions. Word has length 48 [2021-11-23 17:25:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:02,871 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 193 transitions. [2021-11-23 17:25:02,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 193 transitions. [2021-11-23 17:25:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 17:25:02,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:02,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:02,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:03,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:03,088 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1788008380, now seen corresponding path program 1 times [2021-11-23 17:25:03,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:03,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049993304] [2021-11-23 17:25:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:03,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:03,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:03,092 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:03,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:25:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:03,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:25:03,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:03,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:03,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:03,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049993304] [2021-11-23 17:25:03,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049993304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:03,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:03,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 17:25:03,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742299178] [2021-11-23 17:25:03,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:03,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:25:03,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:03,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:25:03,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:25:03,709 INFO L87 Difference]: Start difference. First operand 155 states and 193 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:03,820 INFO L93 Difference]: Finished difference Result 238 states and 306 transitions. [2021-11-23 17:25:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:25:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-23 17:25:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:03,822 INFO L225 Difference]: With dead ends: 238 [2021-11-23 17:25:03,822 INFO L226 Difference]: Without dead ends: 155 [2021-11-23 17:25:03,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:03,824 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 17 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:03,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 354 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2021-11-23 17:25:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-23 17:25:03,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-11-23 17:25:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 148 states have (on average 1.2972972972972974) internal successors, (192), 154 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 192 transitions. [2021-11-23 17:25:03,832 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 192 transitions. Word has length 48 [2021-11-23 17:25:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:03,833 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 192 transitions. [2021-11-23 17:25:03,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 192 transitions. [2021-11-23 17:25:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 17:25:03,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:03,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:03,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:04,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:04,053 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:04,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1932349207, now seen corresponding path program 1 times [2021-11-23 17:25:04,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:04,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788848718] [2021-11-23 17:25:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:04,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:04,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:04,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:04,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:25:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:04,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:25:04,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:06,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:06,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:06,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788848718] [2021-11-23 17:25:06,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788848718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:06,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:06,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-23 17:25:06,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397058156] [2021-11-23 17:25:06,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:06,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 17:25:06,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:06,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 17:25:06,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:25:06,297 INFO L87 Difference]: Start difference. First operand 155 states and 192 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:06,487 INFO L93 Difference]: Finished difference Result 177 states and 218 transitions. [2021-11-23 17:25:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 17:25:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-23 17:25:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:06,489 INFO L225 Difference]: With dead ends: 177 [2021-11-23 17:25:06,489 INFO L226 Difference]: Without dead ends: 161 [2021-11-23 17:25:06,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:25:06,490 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 37 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:06,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1145 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 325 Unchecked, 0.1s Time] [2021-11-23 17:25:06,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-23 17:25:06,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-23 17:25:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 154 states have (on average 1.2987012987012987) internal successors, (200), 160 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 200 transitions. [2021-11-23 17:25:06,501 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 200 transitions. Word has length 50 [2021-11-23 17:25:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:06,502 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 200 transitions. [2021-11-23 17:25:06,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 200 transitions. [2021-11-23 17:25:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 17:25:06,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:06,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:06,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:06,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:06,716 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:06,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:06,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1779763646, now seen corresponding path program 1 times [2021-11-23 17:25:06,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:06,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338918410] [2021-11-23 17:25:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:06,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:06,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:06,718 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:06,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:25:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:25:06,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:08,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:08,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:08,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338918410] [2021-11-23 17:25:08,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338918410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:08,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:08,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-23 17:25:08,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830269922] [2021-11-23 17:25:08,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:08,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 17:25:08,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:08,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 17:25:08,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:25:08,295 INFO L87 Difference]: Start difference. First operand 161 states and 200 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:08,411 INFO L93 Difference]: Finished difference Result 204 states and 267 transitions. [2021-11-23 17:25:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:25:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-23 17:25:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:08,414 INFO L225 Difference]: With dead ends: 204 [2021-11-23 17:25:08,414 INFO L226 Difference]: Without dead ends: 128 [2021-11-23 17:25:08,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:25:08,416 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 49 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:08,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 746 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 205 Unchecked, 0.1s Time] [2021-11-23 17:25:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-23 17:25:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-11-23 17:25:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 124 states have (on average 1.2983870967741935) internal successors, (161), 127 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 161 transitions. [2021-11-23 17:25:08,423 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 161 transitions. Word has length 50 [2021-11-23 17:25:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:08,424 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 161 transitions. [2021-11-23 17:25:08,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 161 transitions. [2021-11-23 17:25:08,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 17:25:08,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:08,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:08,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 17:25:08,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:08,638 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:08,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1195663953, now seen corresponding path program 1 times [2021-11-23 17:25:08,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:08,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414426256] [2021-11-23 17:25:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:08,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:08,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:08,643 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:08,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:25:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:08,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:25:08,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:09,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:09,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:09,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414426256] [2021-11-23 17:25:09,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414426256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:09,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:09,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:25:09,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026476259] [2021-11-23 17:25:09,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:09,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:25:09,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:09,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:25:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:09,466 INFO L87 Difference]: Start difference. First operand 128 states and 161 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:09,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:09,539 INFO L93 Difference]: Finished difference Result 189 states and 248 transitions. [2021-11-23 17:25:09,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:25:09,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-23 17:25:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:09,541 INFO L225 Difference]: With dead ends: 189 [2021-11-23 17:25:09,541 INFO L226 Difference]: Without dead ends: 128 [2021-11-23 17:25:09,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:25:09,542 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 38 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:09,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 440 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 108 Unchecked, 0.0s Time] [2021-11-23 17:25:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-23 17:25:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-11-23 17:25:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 124 states have (on average 1.282258064516129) internal successors, (159), 127 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 159 transitions. [2021-11-23 17:25:09,548 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 159 transitions. Word has length 51 [2021-11-23 17:25:09,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:09,548 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 159 transitions. [2021-11-23 17:25:09,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:09,548 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 159 transitions. [2021-11-23 17:25:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 17:25:09,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:09,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:09,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:09,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:09,768 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:09,769 INFO L85 PathProgramCache]: Analyzing trace with hash 72941877, now seen corresponding path program 1 times [2021-11-23 17:25:09,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:09,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579623282] [2021-11-23 17:25:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:09,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:09,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:09,771 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:09,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:25:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:09,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:25:09,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:12,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:12,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:12,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579623282] [2021-11-23 17:25:12,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579623282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:12,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:12,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-23 17:25:12,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474086235] [2021-11-23 17:25:12,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:12,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 17:25:12,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 17:25:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:25:12,067 INFO L87 Difference]: Start difference. First operand 128 states and 159 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:12,242 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2021-11-23 17:25:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 17:25:12,242 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-23 17:25:12,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:12,243 INFO L225 Difference]: With dead ends: 128 [2021-11-23 17:25:12,243 INFO L226 Difference]: Without dead ends: 112 [2021-11-23 17:25:12,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-11-23 17:25:12,244 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 33 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:12,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 969 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 247 Unchecked, 0.1s Time] [2021-11-23 17:25:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-23 17:25:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2021-11-23 17:25:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 104 states have (on average 1.2884615384615385) internal successors, (134), 105 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 134 transitions. [2021-11-23 17:25:12,248 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 134 transitions. Word has length 51 [2021-11-23 17:25:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:12,248 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 134 transitions. [2021-11-23 17:25:12,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 134 transitions. [2021-11-23 17:25:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 17:25:12,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:12,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:12,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:12,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:12,458 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:12,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:12,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1837589620, now seen corresponding path program 1 times [2021-11-23 17:25:12,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:12,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899121032] [2021-11-23 17:25:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:12,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:12,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:12,460 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:12,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:25:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:12,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:25:12,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:15,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:15,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:15,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899121032] [2021-11-23 17:25:15,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899121032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:15,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:15,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-23 17:25:15,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446114783] [2021-11-23 17:25:15,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:15,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 17:25:15,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:15,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 17:25:15,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-23 17:25:15,376 INFO L87 Difference]: Start difference. First operand 106 states and 134 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:15,534 INFO L93 Difference]: Finished difference Result 123 states and 154 transitions. [2021-11-23 17:25:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 17:25:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-23 17:25:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:15,535 INFO L225 Difference]: With dead ends: 123 [2021-11-23 17:25:15,536 INFO L226 Difference]: Without dead ends: 117 [2021-11-23 17:25:15,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:25:15,537 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 63 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:15,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 630 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 163 Unchecked, 0.0s Time] [2021-11-23 17:25:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-23 17:25:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-23 17:25:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 116 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 148 transitions. [2021-11-23 17:25:15,544 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 148 transitions. Word has length 53 [2021-11-23 17:25:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:15,545 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 148 transitions. [2021-11-23 17:25:15,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 148 transitions. [2021-11-23 17:25:15,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 17:25:15,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:15,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:15,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:15,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:15,758 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:15,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:15,758 INFO L85 PathProgramCache]: Analyzing trace with hash 576756188, now seen corresponding path program 1 times [2021-11-23 17:25:15,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:15,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348658485] [2021-11-23 17:25:15,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:15,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:15,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:15,759 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:15,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:25:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:15,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:25:15,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:16,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:16,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:16,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348658485] [2021-11-23 17:25:16,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348658485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:16,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:16,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 17:25:16,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185160958] [2021-11-23 17:25:16,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:16,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:25:16,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:16,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:25:16,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:25:16,788 INFO L87 Difference]: Start difference. First operand 117 states and 148 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:16,856 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2021-11-23 17:25:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:25:16,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-23 17:25:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:16,858 INFO L225 Difference]: With dead ends: 117 [2021-11-23 17:25:16,858 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 17:25:16,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:25:16,859 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 23 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:16,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 682 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 79 Unchecked, 0.0s Time] [2021-11-23 17:25:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 17:25:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2021-11-23 17:25:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.292929292929293) internal successors, (128), 99 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2021-11-23 17:25:16,865 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 54 [2021-11-23 17:25:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:16,865 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2021-11-23 17:25:16,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2021-11-23 17:25:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 17:25:16,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:16,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:16,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:17,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:17,067 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:17,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1764715460, now seen corresponding path program 1 times [2021-11-23 17:25:17,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:17,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160142235] [2021-11-23 17:25:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:17,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:17,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:17,068 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:17,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:25:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:17,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:25:17,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:17,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:17,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:17,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160142235] [2021-11-23 17:25:17,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160142235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:17,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:17,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:25:17,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415528549] [2021-11-23 17:25:17,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:17,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:25:17,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:25:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:17,828 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:17,902 INFO L93 Difference]: Finished difference Result 149 states and 201 transitions. [2021-11-23 17:25:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:25:17,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 17:25:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:17,904 INFO L225 Difference]: With dead ends: 149 [2021-11-23 17:25:17,904 INFO L226 Difference]: Without dead ends: 100 [2021-11-23 17:25:17,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:25:17,905 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 30 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:17,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 372 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2021-11-23 17:25:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-23 17:25:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-11-23 17:25:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2828282828282829) internal successors, (127), 99 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2021-11-23 17:25:17,910 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 71 [2021-11-23 17:25:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:17,910 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2021-11-23 17:25:17,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2021-11-23 17:25:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 17:25:17,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:17,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:17,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:18,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:18,112 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:18,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1606475905, now seen corresponding path program 1 times [2021-11-23 17:25:18,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:18,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943893852] [2021-11-23 17:25:18,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:18,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:18,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:18,114 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:18,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:25:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:18,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:25:18,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:19,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:19,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:19,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943893852] [2021-11-23 17:25:19,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943893852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:19,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:19,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:25:19,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881808360] [2021-11-23 17:25:19,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:19,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:25:19,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:19,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:25:19,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:19,019 INFO L87 Difference]: Start difference. First operand 100 states and 127 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:19,069 INFO L93 Difference]: Finished difference Result 167 states and 223 transitions. [2021-11-23 17:25:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:25:19,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-23 17:25:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:19,071 INFO L225 Difference]: With dead ends: 167 [2021-11-23 17:25:19,071 INFO L226 Difference]: Without dead ends: 124 [2021-11-23 17:25:19,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:25:19,072 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 35 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:19,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 376 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2021-11-23 17:25:19,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-23 17:25:19,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-11-23 17:25:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.256198347107438) internal successors, (152), 121 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 152 transitions. [2021-11-23 17:25:19,081 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 152 transitions. Word has length 73 [2021-11-23 17:25:19,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:19,081 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 152 transitions. [2021-11-23 17:25:19,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 152 transitions. [2021-11-23 17:25:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 17:25:19,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:19,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:19,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:19,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:19,292 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:19,293 INFO L85 PathProgramCache]: Analyzing trace with hash -508519616, now seen corresponding path program 1 times [2021-11-23 17:25:19,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:19,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924931275] [2021-11-23 17:25:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:19,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:19,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:19,294 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:19,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:25:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:19,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:19,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:19,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:19,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:19,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924931275] [2021-11-23 17:25:19,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924931275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:19,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:19,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:19,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343212415] [2021-11-23 17:25:19,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:19,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:19,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:19,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:19,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:19,527 INFO L87 Difference]: Start difference. First operand 122 states and 152 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:19,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:19,555 INFO L93 Difference]: Finished difference Result 200 states and 273 transitions. [2021-11-23 17:25:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:19,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-23 17:25:19,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:19,561 INFO L225 Difference]: With dead ends: 200 [2021-11-23 17:25:19,561 INFO L226 Difference]: Without dead ends: 157 [2021-11-23 17:25:19,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:19,562 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 67 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:19,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 243 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:25:19,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-23 17:25:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2021-11-23 17:25:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.3246753246753247) internal successors, (204), 154 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 204 transitions. [2021-11-23 17:25:19,581 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 204 transitions. Word has length 73 [2021-11-23 17:25:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:19,581 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 204 transitions. [2021-11-23 17:25:19,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 204 transitions. [2021-11-23 17:25:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 17:25:19,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:19,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:19,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:19,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:19,799 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:19,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1978463342, now seen corresponding path program 1 times [2021-11-23 17:25:19,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:19,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301863286] [2021-11-23 17:25:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:19,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:19,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:19,801 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:19,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:25:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:19,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:25:19,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:20,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:20,907 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:20,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301863286] [2021-11-23 17:25:20,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301863286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:20,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:20,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:25:20,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257011966] [2021-11-23 17:25:20,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:20,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:25:20,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:20,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:25:20,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:25:20,910 INFO L87 Difference]: Start difference. First operand 155 states and 204 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:20,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:20,970 INFO L93 Difference]: Finished difference Result 270 states and 370 transitions. [2021-11-23 17:25:20,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:25:20,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-23 17:25:20,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:20,972 INFO L225 Difference]: With dead ends: 270 [2021-11-23 17:25:20,972 INFO L226 Difference]: Without dead ends: 194 [2021-11-23 17:25:20,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:25:20,973 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 52 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:20,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 471 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 102 Unchecked, 0.0s Time] [2021-11-23 17:25:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-23 17:25:20,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2021-11-23 17:25:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.293193717277487) internal successors, (247), 191 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 247 transitions. [2021-11-23 17:25:20,986 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 247 transitions. Word has length 74 [2021-11-23 17:25:20,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:20,987 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 247 transitions. [2021-11-23 17:25:20,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:20,987 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 247 transitions. [2021-11-23 17:25:20,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 17:25:20,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:20,988 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:21,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:21,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:21,203 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:21,204 INFO L85 PathProgramCache]: Analyzing trace with hash -699138607, now seen corresponding path program 1 times [2021-11-23 17:25:21,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:21,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503104191] [2021-11-23 17:25:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:21,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:21,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:21,205 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:21,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:25:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:21,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:21,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:21,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:21,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:21,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503104191] [2021-11-23 17:25:21,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503104191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:21,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:21,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:21,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472027363] [2021-11-23 17:25:21,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:21,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:21,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:21,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:21,421 INFO L87 Difference]: Start difference. First operand 192 states and 247 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:21,447 INFO L93 Difference]: Finished difference Result 328 states and 459 transitions. [2021-11-23 17:25:21,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:21,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-23 17:25:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:21,450 INFO L225 Difference]: With dead ends: 328 [2021-11-23 17:25:21,451 INFO L226 Difference]: Without dead ends: 252 [2021-11-23 17:25:21,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:21,453 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 59 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:21,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 243 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:25:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-23 17:25:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2021-11-23 17:25:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.3534136546184738) internal successors, (337), 249 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 337 transitions. [2021-11-23 17:25:21,480 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 337 transitions. Word has length 74 [2021-11-23 17:25:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:21,481 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 337 transitions. [2021-11-23 17:25:21,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 337 transitions. [2021-11-23 17:25:21,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 17:25:21,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:21,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:21,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:21,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:21,688 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:21,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:21,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1084074957, now seen corresponding path program 1 times [2021-11-23 17:25:21,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:21,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154960735] [2021-11-23 17:25:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:21,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:21,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:21,690 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:21,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:25:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:21,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:25:21,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:22,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:22,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:22,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154960735] [2021-11-23 17:25:22,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154960735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:22,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:22,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:25:22,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149713466] [2021-11-23 17:25:22,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:22,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:25:22,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:22,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:25:22,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:25:22,928 INFO L87 Difference]: Start difference. First operand 250 states and 337 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:22,997 INFO L93 Difference]: Finished difference Result 416 states and 585 transitions. [2021-11-23 17:25:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:25:22,998 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-23 17:25:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:23,000 INFO L225 Difference]: With dead ends: 416 [2021-11-23 17:25:23,000 INFO L226 Difference]: Without dead ends: 282 [2021-11-23 17:25:23,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:25:23,001 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 41 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:23,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 488 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 93 Unchecked, 0.0s Time] [2021-11-23 17:25:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-23 17:25:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2021-11-23 17:25:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.3333333333333333) internal successors, (372), 279 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 372 transitions. [2021-11-23 17:25:23,020 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 372 transitions. Word has length 75 [2021-11-23 17:25:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:23,021 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 372 transitions. [2021-11-23 17:25:23,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 372 transitions. [2021-11-23 17:25:23,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 17:25:23,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:23,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:23,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:23,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:23,238 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:23,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1015573108, now seen corresponding path program 1 times [2021-11-23 17:25:23,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:23,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442939438] [2021-11-23 17:25:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:23,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:23,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:23,239 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:23,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:25:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:23,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:25:23,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:23,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:23,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:23,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442939438] [2021-11-23 17:25:23,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442939438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:23,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:23,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:25:23,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738211075] [2021-11-23 17:25:23,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:23,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:25:23,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:23,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:25:23,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:25:23,811 INFO L87 Difference]: Start difference. First operand 280 states and 372 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:23,933 INFO L93 Difference]: Finished difference Result 816 states and 1208 transitions. [2021-11-23 17:25:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:25:23,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-23 17:25:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:23,938 INFO L225 Difference]: With dead ends: 816 [2021-11-23 17:25:23,939 INFO L226 Difference]: Without dead ends: 682 [2021-11-23 17:25:23,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:25:23,940 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 362 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:23,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 360 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:25:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-11-23 17:25:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 544. [2021-11-23 17:25:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 1.429097605893186) internal successors, (776), 543 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 776 transitions. [2021-11-23 17:25:23,977 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 776 transitions. Word has length 75 [2021-11-23 17:25:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:23,977 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 776 transitions. [2021-11-23 17:25:23,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 776 transitions. [2021-11-23 17:25:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:25:23,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:23,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:23,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:24,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:24,191 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:24,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1575435556, now seen corresponding path program 1 times [2021-11-23 17:25:24,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:24,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318970268] [2021-11-23 17:25:24,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:24,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:24,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:24,193 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:24,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 17:25:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:24,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:24,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:24,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:24,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:24,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318970268] [2021-11-23 17:25:24,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318970268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:24,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:24,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:25:24,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25988048] [2021-11-23 17:25:24,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:24,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:25:24,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:24,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:25:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:25:24,579 INFO L87 Difference]: Start difference. First operand 544 states and 776 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:24,632 INFO L93 Difference]: Finished difference Result 964 states and 1420 transitions. [2021-11-23 17:25:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:25:24,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 17:25:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:24,637 INFO L225 Difference]: With dead ends: 964 [2021-11-23 17:25:24,637 INFO L226 Difference]: Without dead ends: 566 [2021-11-23 17:25:24,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:25:24,639 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 16 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:24,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 299 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-23 17:25:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-23 17:25:24,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 565. [2021-11-23 17:25:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.425531914893617) internal successors, (804), 564 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 804 transitions. [2021-11-23 17:25:24,676 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 804 transitions. Word has length 77 [2021-11-23 17:25:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:24,676 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 804 transitions. [2021-11-23 17:25:24,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 804 transitions. [2021-11-23 17:25:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 17:25:24,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:24,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:24,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:24,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:24,890 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:24,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:24,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1428406526, now seen corresponding path program 1 times [2021-11-23 17:25:24,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:24,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095917709] [2021-11-23 17:25:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:24,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:24,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:24,893 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:24,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:25:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:25,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:25,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:25,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:25,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:25,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095917709] [2021-11-23 17:25:25,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095917709] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:25,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:25,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:25,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257839995] [2021-11-23 17:25:25,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:25,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:25,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:25,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:25,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:25,133 INFO L87 Difference]: Start difference. First operand 565 states and 804 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:25,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:25,183 INFO L93 Difference]: Finished difference Result 1241 states and 1838 transitions. [2021-11-23 17:25:25,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:25,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-23 17:25:25,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:25,190 INFO L225 Difference]: With dead ends: 1241 [2021-11-23 17:25:25,190 INFO L226 Difference]: Without dead ends: 843 [2021-11-23 17:25:25,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:25,193 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 72 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:25,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 251 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:25:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-11-23 17:25:25,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 841. [2021-11-23 17:25:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.4357142857142857) internal successors, (1206), 840 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1206 transitions. [2021-11-23 17:25:25,248 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1206 transitions. Word has length 78 [2021-11-23 17:25:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:25,249 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1206 transitions. [2021-11-23 17:25:25,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1206 transitions. [2021-11-23 17:25:25,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-23 17:25:25,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:25,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:25,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:25,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:25,463 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:25,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:25,464 INFO L85 PathProgramCache]: Analyzing trace with hash 79227620, now seen corresponding path program 1 times [2021-11-23 17:25:25,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:25,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443621516] [2021-11-23 17:25:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:25,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:25,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:25,466 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:25,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 17:25:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:25,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:25:25,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:25,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:25,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:25,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443621516] [2021-11-23 17:25:25,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443621516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:25,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:25,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:25:25,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768047369] [2021-11-23 17:25:25,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:25,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:25:25,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:25:25,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:25:25,751 INFO L87 Difference]: Start difference. First operand 841 states and 1206 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:25,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:25,899 INFO L93 Difference]: Finished difference Result 1616 states and 2329 transitions. [2021-11-23 17:25:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:25:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-23 17:25:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:25,910 INFO L225 Difference]: With dead ends: 1616 [2021-11-23 17:25:25,910 INFO L226 Difference]: Without dead ends: 1614 [2021-11-23 17:25:25,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:25:25,914 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 209 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:25,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 498 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:25:25,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-11-23 17:25:25,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 913. [2021-11-23 17:25:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 1.4013157894736843) internal successors, (1278), 912 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1278 transitions. [2021-11-23 17:25:25,996 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1278 transitions. Word has length 78 [2021-11-23 17:25:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:25,996 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1278 transitions. [2021-11-23 17:25:25,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1278 transitions. [2021-11-23 17:25:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:25:25,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:25,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:26,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:26,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:26,209 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:26,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:26,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1762589285, now seen corresponding path program 1 times [2021-11-23 17:25:26,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:26,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040900432] [2021-11-23 17:25:26,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:26,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:26,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:26,213 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:26,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 17:25:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:26,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:26,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:26,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:26,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040900432] [2021-11-23 17:25:26,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040900432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:26,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:26,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:25:26,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815817178] [2021-11-23 17:25:26,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:26,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:25:26,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:25:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:25:26,687 INFO L87 Difference]: Start difference. First operand 913 states and 1278 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:26,766 INFO L93 Difference]: Finished difference Result 1661 states and 2374 transitions. [2021-11-23 17:25:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:25:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 17:25:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:26,773 INFO L225 Difference]: With dead ends: 1661 [2021-11-23 17:25:26,773 INFO L226 Difference]: Without dead ends: 915 [2021-11-23 17:25:26,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:25:26,775 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 15 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:26,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 292 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-23 17:25:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-11-23 17:25:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2021-11-23 17:25:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 1.400437636761488) internal successors, (1280), 914 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1280 transitions. [2021-11-23 17:25:26,850 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1280 transitions. Word has length 79 [2021-11-23 17:25:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:26,850 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1280 transitions. [2021-11-23 17:25:26,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1280 transitions. [2021-11-23 17:25:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 17:25:26,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:26,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:26,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:27,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:27,065 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:27,065 INFO L85 PathProgramCache]: Analyzing trace with hash -525571119, now seen corresponding path program 1 times [2021-11-23 17:25:27,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:27,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435882150] [2021-11-23 17:25:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:27,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:27,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:27,067 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:27,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:25:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:27,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:27,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:27,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:27,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435882150] [2021-11-23 17:25:27,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435882150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:27,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:27,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:27,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396738998] [2021-11-23 17:25:27,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:27,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:27,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:27,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:27,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:27,353 INFO L87 Difference]: Start difference. First operand 915 states and 1280 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:27,440 INFO L93 Difference]: Finished difference Result 1663 states and 2374 transitions. [2021-11-23 17:25:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:27,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-23 17:25:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:27,446 INFO L225 Difference]: With dead ends: 1663 [2021-11-23 17:25:27,446 INFO L226 Difference]: Without dead ends: 917 [2021-11-23 17:25:27,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:27,450 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 57 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:27,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 241 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:25:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-11-23 17:25:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 915. [2021-11-23 17:25:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 1.387308533916849) internal successors, (1268), 914 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1268 transitions. [2021-11-23 17:25:27,527 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1268 transitions. Word has length 98 [2021-11-23 17:25:27,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:27,527 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1268 transitions. [2021-11-23 17:25:27,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1268 transitions. [2021-11-23 17:25:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:25:27,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:27,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:27,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:27,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:27,742 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash -936224924, now seen corresponding path program 1 times [2021-11-23 17:25:27,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:27,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222395719] [2021-11-23 17:25:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:27,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:27,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:27,744 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:27,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 17:25:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:27,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:25:27,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:25:28,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:28,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:28,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222395719] [2021-11-23 17:25:28,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222395719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:28,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:28,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:25:28,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942249225] [2021-11-23 17:25:28,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:28,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:25:28,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:28,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:25:28,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:25:28,294 INFO L87 Difference]: Start difference. First operand 915 states and 1268 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:28,374 INFO L93 Difference]: Finished difference Result 1667 states and 2356 transitions. [2021-11-23 17:25:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:25:28,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 99 [2021-11-23 17:25:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:28,380 INFO L225 Difference]: With dead ends: 1667 [2021-11-23 17:25:28,380 INFO L226 Difference]: Without dead ends: 921 [2021-11-23 17:25:28,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:25:28,382 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 15 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:28,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 291 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-23 17:25:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-11-23 17:25:28,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 921. [2021-11-23 17:25:28,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 1.3847826086956523) internal successors, (1274), 920 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1274 transitions. [2021-11-23 17:25:28,470 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1274 transitions. Word has length 99 [2021-11-23 17:25:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:28,471 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1274 transitions. [2021-11-23 17:25:28,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1274 transitions. [2021-11-23 17:25:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:25:28,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:28,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:28,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:28,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:28,686 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:28,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:28,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1753873374, now seen corresponding path program 1 times [2021-11-23 17:25:28,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:28,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672409223] [2021-11-23 17:25:28,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:28,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:28,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:28,688 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:28,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 17:25:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:28,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:25:28,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:30,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:30,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:30,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672409223] [2021-11-23 17:25:30,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672409223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:30,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [730849909] [2021-11-23 17:25:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:30,969 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:30,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:30,972 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:31,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-23 17:25:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:31,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:25:31,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:32,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:32,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [730849909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:32,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575101014] [2021-11-23 17:25:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:32,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:32,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:32,891 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:32,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 17:25:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:32,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:25:32,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:34,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:34,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575101014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:34,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:34,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 17:25:34,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138764864] [2021-11-23 17:25:34,914 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:34,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 17:25:34,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:34,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 17:25:34,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:25:34,918 INFO L87 Difference]: Start difference. First operand 921 states and 1274 transitions. Second operand has 32 states, 32 states have (on average 9.46875) internal successors, (303), 31 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:35,399 INFO L93 Difference]: Finished difference Result 1712 states and 2407 transitions. [2021-11-23 17:25:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:25:35,399 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 9.46875) internal successors, (303), 31 states have internal predecessors, (303), 0 states have call successors, (0), 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 99 [2021-11-23 17:25:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:35,405 INFO L225 Difference]: With dead ends: 1712 [2021-11-23 17:25:35,405 INFO L226 Difference]: Without dead ends: 966 [2021-11-23 17:25:35,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 17:25:35,408 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 139 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:35,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1532 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2021-11-23 17:25:35,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-11-23 17:25:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 966. [2021-11-23 17:25:35,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 1.3730569948186528) internal successors, (1325), 965 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1325 transitions. [2021-11-23 17:25:35,485 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1325 transitions. Word has length 99 [2021-11-23 17:25:35,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:35,485 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1325 transitions. [2021-11-23 17:25:35,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.46875) internal successors, (303), 31 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1325 transitions. [2021-11-23 17:25:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:25:35,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:35,488 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:35,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:35,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:35,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-23 17:25:36,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:36,091 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:36,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:36,091 INFO L85 PathProgramCache]: Analyzing trace with hash 474628642, now seen corresponding path program 1 times [2021-11-23 17:25:36,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:36,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629798683] [2021-11-23 17:25:36,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:36,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:36,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:36,093 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:36,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 17:25:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:25:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:37,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:38,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:38,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629798683] [2021-11-23 17:25:38,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629798683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:38,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2142524112] [2021-11-23 17:25:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:38,207 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:38,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:38,212 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:38,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-23 17:25:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:38,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:25:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:39,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:40,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2142524112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:40,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50673314] [2021-11-23 17:25:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:40,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:40,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:40,139 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:40,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 17:25:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:40,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:25:40,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:41,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:41,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50673314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:41,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:41,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 8, 8] total 29 [2021-11-23 17:25:41,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035158952] [2021-11-23 17:25:41,918 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:41,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 17:25:41,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:41,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 17:25:41,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-11-23 17:25:41,920 INFO L87 Difference]: Start difference. First operand 966 states and 1325 transitions. Second operand has 30 states, 30 states have (on average 10.3) internal successors, (309), 29 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:42,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:42,228 INFO L93 Difference]: Finished difference Result 1789 states and 2505 transitions. [2021-11-23 17:25:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 17:25:42,229 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 10.3) internal successors, (309), 29 states have internal predecessors, (309), 0 states have call successors, (0), 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 99 [2021-11-23 17:25:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:42,234 INFO L225 Difference]: With dead ends: 1789 [2021-11-23 17:25:42,235 INFO L226 Difference]: Without dead ends: 1043 [2021-11-23 17:25:42,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 17:25:42,237 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 114 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:42,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1373 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 146 Unchecked, 0.1s Time] [2021-11-23 17:25:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-23 17:25:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1041. [2021-11-23 17:25:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 1.3634615384615385) internal successors, (1418), 1040 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1418 transitions. [2021-11-23 17:25:42,336 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1418 transitions. Word has length 99 [2021-11-23 17:25:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:42,336 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1418 transitions. [2021-11-23 17:25:42,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 10.3) internal successors, (309), 29 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1418 transitions. [2021-11-23 17:25:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:25:42,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:42,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:42,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:42,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:42,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-23 17:25:42,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:42,951 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:42,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1482306741, now seen corresponding path program 1 times [2021-11-23 17:25:42,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:42,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256719505] [2021-11-23 17:25:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:42,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:42,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:42,953 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:42,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 17:25:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:43,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:25:43,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:43,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:43,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256719505] [2021-11-23 17:25:43,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256719505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:43,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:43,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:43,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899010968] [2021-11-23 17:25:43,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:43,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:43,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:43,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:43,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:43,208 INFO L87 Difference]: Start difference. First operand 1041 states and 1418 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:43,351 INFO L93 Difference]: Finished difference Result 1812 states and 2528 transitions. [2021-11-23 17:25:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:43,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-23 17:25:43,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:43,357 INFO L225 Difference]: With dead ends: 1812 [2021-11-23 17:25:43,357 INFO L226 Difference]: Without dead ends: 1041 [2021-11-23 17:25:43,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:43,366 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 89 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:43,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 141 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:25:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-11-23 17:25:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1041. [2021-11-23 17:25:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 1.3442307692307693) internal successors, (1398), 1040 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1398 transitions. [2021-11-23 17:25:43,450 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1398 transitions. Word has length 100 [2021-11-23 17:25:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:43,450 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1398 transitions. [2021-11-23 17:25:43,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1398 transitions. [2021-11-23 17:25:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:25:43,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:43,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:43,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:43,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:43,664 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:43,665 INFO L85 PathProgramCache]: Analyzing trace with hash -826730954, now seen corresponding path program 1 times [2021-11-23 17:25:43,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:43,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426174239] [2021-11-23 17:25:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:43,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:43,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:43,667 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:43,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 17:25:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:43,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:43,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:25:43,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:43,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:43,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426174239] [2021-11-23 17:25:43,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426174239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:43,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:43,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:43,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323179701] [2021-11-23 17:25:43,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:43,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:43,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:43,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:43,927 INFO L87 Difference]: Start difference. First operand 1041 states and 1398 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:44,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:44,058 INFO L93 Difference]: Finished difference Result 1806 states and 2488 transitions. [2021-11-23 17:25:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:44,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 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 100 [2021-11-23 17:25:44,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:44,064 INFO L225 Difference]: With dead ends: 1806 [2021-11-23 17:25:44,065 INFO L226 Difference]: Without dead ends: 1041 [2021-11-23 17:25:44,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:44,068 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 86 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:44,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 122 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:25:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-11-23 17:25:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1041. [2021-11-23 17:25:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 1.3269230769230769) internal successors, (1380), 1040 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1380 transitions. [2021-11-23 17:25:44,170 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1380 transitions. Word has length 100 [2021-11-23 17:25:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:44,170 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1380 transitions. [2021-11-23 17:25:44,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1380 transitions. [2021-11-23 17:25:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:25:44,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:44,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:44,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:44,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:44,380 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:44,381 INFO L85 PathProgramCache]: Analyzing trace with hash 2081246175, now seen corresponding path program 1 times [2021-11-23 17:25:44,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:44,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738068272] [2021-11-23 17:25:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:44,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:44,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:44,383 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:44,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 17:25:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:44,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:44,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:25:44,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:44,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:44,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738068272] [2021-11-23 17:25:44,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738068272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:44,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:44,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:44,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571208351] [2021-11-23 17:25:44,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:44,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:44,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:44,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:44,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:44,657 INFO L87 Difference]: Start difference. First operand 1041 states and 1380 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:44,779 INFO L93 Difference]: Finished difference Result 1800 states and 2450 transitions. [2021-11-23 17:25:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:44,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-23 17:25:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:44,786 INFO L225 Difference]: With dead ends: 1800 [2021-11-23 17:25:44,786 INFO L226 Difference]: Without dead ends: 1041 [2021-11-23 17:25:44,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:44,788 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:44,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 103 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:25:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-11-23 17:25:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1041. [2021-11-23 17:25:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 1.3115384615384615) internal successors, (1364), 1040 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1364 transitions. [2021-11-23 17:25:44,888 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1364 transitions. Word has length 100 [2021-11-23 17:25:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:44,888 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1364 transitions. [2021-11-23 17:25:44,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1364 transitions. [2021-11-23 17:25:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:25:44,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:44,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:44,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:45,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:45,102 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:45,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1809739704, now seen corresponding path program 1 times [2021-11-23 17:25:45,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:45,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62890632] [2021-11-23 17:25:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:45,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:45,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:45,105 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:45,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 17:25:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:45,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:25:45,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:46,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:47,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:47,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62890632] [2021-11-23 17:25:47,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62890632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:47,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [19601181] [2021-11-23 17:25:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:47,169 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:47,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:47,170 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:47,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-23 17:25:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:47,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:25:47,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:48,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:49,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [19601181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:49,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943324809] [2021-11-23 17:25:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:49,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:49,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:49,015 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:49,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 17:25:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:49,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:25:49,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:50,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:51,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943324809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:51,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:51,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2021-11-23 17:25:51,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173412813] [2021-11-23 17:25:51,033 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:51,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 17:25:51,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:51,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 17:25:51,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:25:51,035 INFO L87 Difference]: Start difference. First operand 1041 states and 1364 transitions. Second operand has 32 states, 32 states have (on average 10.15625) internal successors, (325), 31 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:51,599 INFO L93 Difference]: Finished difference Result 1931 states and 2583 transitions. [2021-11-23 17:25:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 17:25:51,600 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 10.15625) internal successors, (325), 31 states have internal predecessors, (325), 0 states have call successors, (0), 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 100 [2021-11-23 17:25:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:51,604 INFO L225 Difference]: With dead ends: 1931 [2021-11-23 17:25:51,604 INFO L226 Difference]: Without dead ends: 1185 [2021-11-23 17:25:51,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 17:25:51,608 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 140 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:51,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1432 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 118 Invalid, 0 Unknown, 344 Unchecked, 0.1s Time] [2021-11-23 17:25:51,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-11-23 17:25:51,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1143. [2021-11-23 17:25:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 1.3012259194395797) internal successors, (1486), 1142 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1486 transitions. [2021-11-23 17:25:51,714 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1486 transitions. Word has length 100 [2021-11-23 17:25:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:51,714 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 1486 transitions. [2021-11-23 17:25:51,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 10.15625) internal successors, (325), 31 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1486 transitions. [2021-11-23 17:25:51,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:25:51,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:51,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:51,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:51,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-23 17:25:52,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:52,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:52,330 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:52,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:52,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1565638416, now seen corresponding path program 1 times [2021-11-23 17:25:52,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:52,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507423264] [2021-11-23 17:25:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:52,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:52,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:52,332 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:52,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 17:25:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:52,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:25:52,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:52,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:52,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:52,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507423264] [2021-11-23 17:25:52,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507423264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:52,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:52,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:25:52,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409036511] [2021-11-23 17:25:52,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:52,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:25:52,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:52,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:25:52,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:52,582 INFO L87 Difference]: Start difference. First operand 1143 states and 1486 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:52,643 INFO L93 Difference]: Finished difference Result 1519 states and 2010 transitions. [2021-11-23 17:25:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:25:52,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-11-23 17:25:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:52,648 INFO L225 Difference]: With dead ends: 1519 [2021-11-23 17:25:52,648 INFO L226 Difference]: Without dead ends: 773 [2021-11-23 17:25:52,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:25:52,650 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 50 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:52,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 216 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:25:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-11-23 17:25:52,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 771. [2021-11-23 17:25:52,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.2363636363636363) internal successors, (952), 770 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 952 transitions. [2021-11-23 17:25:52,727 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 952 transitions. Word has length 100 [2021-11-23 17:25:52,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:52,727 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 952 transitions. [2021-11-23 17:25:52,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 952 transitions. [2021-11-23 17:25:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:25:52,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:52,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:52,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:52,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:52,941 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:52,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:52,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2008448227, now seen corresponding path program 1 times [2021-11-23 17:25:52,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:52,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290732279] [2021-11-23 17:25:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:52,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:52,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:52,944 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:52,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 17:25:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:53,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:25:53,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:25:53,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:53,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:53,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290732279] [2021-11-23 17:25:53,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290732279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:53,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:53,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:25:53,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650933579] [2021-11-23 17:25:53,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:53,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:25:53,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:25:53,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:25:53,520 INFO L87 Difference]: Start difference. First operand 771 states and 952 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:53,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:53,671 INFO L93 Difference]: Finished difference Result 1980 states and 2611 transitions. [2021-11-23 17:25:53,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:25:53,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-23 17:25:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:53,678 INFO L225 Difference]: With dead ends: 1980 [2021-11-23 17:25:53,678 INFO L226 Difference]: Without dead ends: 1593 [2021-11-23 17:25:53,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:25:53,680 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 146 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:53,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 373 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2021-11-23 17:25:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-11-23 17:25:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1203. [2021-11-23 17:25:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 1.276206322795341) internal successors, (1534), 1202 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1534 transitions. [2021-11-23 17:25:53,793 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1534 transitions. Word has length 100 [2021-11-23 17:25:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:53,794 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 1534 transitions. [2021-11-23 17:25:53,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1534 transitions. [2021-11-23 17:25:53,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:25:53,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:53,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:53,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-23 17:25:54,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:54,008 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:54,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:54,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1046568484, now seen corresponding path program 1 times [2021-11-23 17:25:54,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:54,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968654938] [2021-11-23 17:25:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:54,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:54,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:54,010 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:54,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 17:25:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:54,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:25:54,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:54,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:55,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:55,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968654938] [2021-11-23 17:25:55,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968654938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:55,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [575863881] [2021-11-23 17:25:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:55,227 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:55,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:55,228 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:55,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-23 17:25:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:25:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:56,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:56,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [575863881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:56,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940333458] [2021-11-23 17:25:56,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:56,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:56,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:25:56,357 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:25:56,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-23 17:25:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:56,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:25:56,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:57,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:25:57,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940333458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:57,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:25:57,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:25:57,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273069277] [2021-11-23 17:25:57,439 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:25:57,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:25:57,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:57,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:25:57,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:25:57,440 INFO L87 Difference]: Start difference. First operand 1203 states and 1534 transitions. Second operand has 16 states, 16 states have (on average 11.4375) internal successors, (183), 15 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:57,964 INFO L93 Difference]: Finished difference Result 2363 states and 3127 transitions. [2021-11-23 17:25:57,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 17:25:57,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.4375) internal successors, (183), 15 states have internal predecessors, (183), 0 states have call successors, (0), 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 100 [2021-11-23 17:25:57,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:57,972 INFO L225 Difference]: With dead ends: 2363 [2021-11-23 17:25:57,972 INFO L226 Difference]: Without dead ends: 1975 [2021-11-23 17:25:57,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-11-23 17:25:57,974 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 309 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:57,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1230 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 208 Invalid, 0 Unknown, 216 Unchecked, 0.1s Time] [2021-11-23 17:25:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-11-23 17:25:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1626. [2021-11-23 17:25:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 1.3046153846153845) internal successors, (2120), 1625 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 2120 transitions. [2021-11-23 17:25:58,092 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 2120 transitions. Word has length 100 [2021-11-23 17:25:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:58,092 INFO L470 AbstractCegarLoop]: Abstraction has 1626 states and 2120 transitions. [2021-11-23 17:25:58,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.4375) internal successors, (183), 15 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 2120 transitions. [2021-11-23 17:25:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:25:58,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:58,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:58,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2021-11-23 17:25:58,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-23 17:25:58,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-23 17:25:58,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:58,698 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash 343299858, now seen corresponding path program 1 times [2021-11-23 17:25:58,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:58,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337932485] [2021-11-23 17:25:58,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:58,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:58,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:58,700 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:58,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 17:25:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:58,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:25:58,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:25:59,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:59,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:59,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337932485] [2021-11-23 17:25:59,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337932485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:59,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:25:59,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:25:59,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571417415] [2021-11-23 17:25:59,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:59,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:25:59,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:59,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:25:59,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:25:59,245 INFO L87 Difference]: Start difference. First operand 1626 states and 2120 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:59,538 INFO L93 Difference]: Finished difference Result 4475 states and 6017 transitions. [2021-11-23 17:25:59,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:25:59,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 100 [2021-11-23 17:25:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:59,551 INFO L225 Difference]: With dead ends: 4475 [2021-11-23 17:25:59,551 INFO L226 Difference]: Without dead ends: 3251 [2021-11-23 17:25:59,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:25:59,554 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 155 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:59,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 392 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 123 Unchecked, 0.1s Time] [2021-11-23 17:25:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-11-23 17:25:59,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2680. [2021-11-23 17:25:59,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2679 states have (on average 1.3198954833893244) internal successors, (3536), 2679 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 3536 transitions. [2021-11-23 17:25:59,762 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 3536 transitions. Word has length 100 [2021-11-23 17:25:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:59,762 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 3536 transitions. [2021-11-23 17:25:59,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 3536 transitions. [2021-11-23 17:25:59,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:25:59,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:59,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:25:59,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-23 17:25:59,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:59,977 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:25:59,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:59,977 INFO L85 PathProgramCache]: Analyzing trace with hash -180020813, now seen corresponding path program 1 times [2021-11-23 17:25:59,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:59,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439062976] [2021-11-23 17:25:59,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:59,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:59,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:59,978 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:59,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 17:26:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:00,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:26:00,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 17:26:01,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:01,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:01,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439062976] [2021-11-23 17:26:01,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439062976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:01,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:01,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 17:26:01,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307720212] [2021-11-23 17:26:01,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:01,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 17:26:01,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 17:26:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:26:01,086 INFO L87 Difference]: Start difference. First operand 2680 states and 3536 transitions. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:01,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:01,298 INFO L93 Difference]: Finished difference Result 3424 states and 4559 transitions. [2021-11-23 17:26:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 17:26:01,299 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-23 17:26:01,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:01,313 INFO L225 Difference]: With dead ends: 3424 [2021-11-23 17:26:01,313 INFO L226 Difference]: Without dead ends: 2689 [2021-11-23 17:26:01,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:26:01,316 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 46 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:01,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 343 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 48 Unchecked, 0.0s Time] [2021-11-23 17:26:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2021-11-23 17:26:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2689. [2021-11-23 17:26:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2689 states, 2688 states have (on average 1.318452380952381) internal successors, (3544), 2688 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 3544 transitions. [2021-11-23 17:26:01,531 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 3544 transitions. Word has length 100 [2021-11-23 17:26:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:01,532 INFO L470 AbstractCegarLoop]: Abstraction has 2689 states and 3544 transitions. [2021-11-23 17:26:01,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 3544 transitions. [2021-11-23 17:26:01,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 17:26:01,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:01,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:01,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-23 17:26:01,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:01,738 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:26:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:01,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2022690715, now seen corresponding path program 1 times [2021-11-23 17:26:01,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:01,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613771790] [2021-11-23 17:26:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:01,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:01,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:01,740 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:01,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 17:26:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:01,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:26:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:26:02,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:02,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:02,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613771790] [2021-11-23 17:26:02,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613771790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:02,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:02,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 17:26:02,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836172662] [2021-11-23 17:26:02,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:02,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 17:26:02,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:02,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 17:26:02,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:26:02,578 INFO L87 Difference]: Start difference. First operand 2689 states and 3544 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:02,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:02,838 INFO L93 Difference]: Finished difference Result 4907 states and 6574 transitions. [2021-11-23 17:26:02,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 17:26:02,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-23 17:26:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:02,849 INFO L225 Difference]: With dead ends: 4907 [2021-11-23 17:26:02,849 INFO L226 Difference]: Without dead ends: 2617 [2021-11-23 17:26:02,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:26:02,853 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 36 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:02,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 330 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2021-11-23 17:26:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2021-11-23 17:26:03,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2617. [2021-11-23 17:26:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2616 states have (on average 1.3241590214067278) internal successors, (3464), 2616 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 3464 transitions. [2021-11-23 17:26:03,068 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 3464 transitions. Word has length 100 [2021-11-23 17:26:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:03,069 INFO L470 AbstractCegarLoop]: Abstraction has 2617 states and 3464 transitions. [2021-11-23 17:26:03,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:03,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 3464 transitions. [2021-11-23 17:26:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:26:03,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:03,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:03,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:03,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:03,284 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:26:03,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:03,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2029060878, now seen corresponding path program 1 times [2021-11-23 17:26:03,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:03,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580063132] [2021-11-23 17:26:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:03,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:03,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:03,285 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:03,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 17:26:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:03,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:26:03,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:26:03,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:03,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:03,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580063132] [2021-11-23 17:26:03,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580063132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:03,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:03,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:26:03,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189140643] [2021-11-23 17:26:03,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:03,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:26:03,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:03,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:26:03,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:03,819 INFO L87 Difference]: Start difference. First operand 2617 states and 3464 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:04,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:04,120 INFO L93 Difference]: Finished difference Result 5541 states and 7494 transitions. [2021-11-23 17:26:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:26:04,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 101 [2021-11-23 17:26:04,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:04,127 INFO L225 Difference]: With dead ends: 5541 [2021-11-23 17:26:04,127 INFO L226 Difference]: Without dead ends: 3358 [2021-11-23 17:26:04,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:04,131 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 233 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:04,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 411 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:26:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-11-23 17:26:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 2617. [2021-11-23 17:26:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2616 states have (on average 1.2966360856269112) internal successors, (3392), 2616 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 3392 transitions. [2021-11-23 17:26:04,341 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 3392 transitions. Word has length 101 [2021-11-23 17:26:04,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:04,342 INFO L470 AbstractCegarLoop]: Abstraction has 2617 states and 3392 transitions. [2021-11-23 17:26:04,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:04,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 3392 transitions. [2021-11-23 17:26:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:26:04,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:04,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:04,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:04,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:04,556 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:26:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:04,557 INFO L85 PathProgramCache]: Analyzing trace with hash 233876872, now seen corresponding path program 1 times [2021-11-23 17:26:04,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:04,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738793881] [2021-11-23 17:26:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:04,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:04,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:04,560 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:04,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 17:26:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:04,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:26:04,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 17:26:05,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:05,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:05,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738793881] [2021-11-23 17:26:05,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738793881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:05,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:05,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:26:05,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034944845] [2021-11-23 17:26:05,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:05,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:26:05,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:05,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:26:05,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:05,095 INFO L87 Difference]: Start difference. First operand 2617 states and 3392 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:05,482 INFO L93 Difference]: Finished difference Result 4814 states and 6472 transitions. [2021-11-23 17:26:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:26:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 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 101 [2021-11-23 17:26:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:05,489 INFO L225 Difference]: With dead ends: 4814 [2021-11-23 17:26:05,489 INFO L226 Difference]: Without dead ends: 4085 [2021-11-23 17:26:05,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:05,491 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 251 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:05,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 417 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:26:05,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-11-23 17:26:05,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3352. [2021-11-23 17:26:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 1.2987168009549388) internal successors, (4352), 3351 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 4352 transitions. [2021-11-23 17:26:05,753 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 4352 transitions. Word has length 101 [2021-11-23 17:26:05,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:05,753 INFO L470 AbstractCegarLoop]: Abstraction has 3352 states and 4352 transitions. [2021-11-23 17:26:05,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:05,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 4352 transitions. [2021-11-23 17:26:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 17:26:05,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:05,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:05,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:05,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:05,955 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:26:05,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:05,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1470464178, now seen corresponding path program 1 times [2021-11-23 17:26:05,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:05,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324272508] [2021-11-23 17:26:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:05,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:05,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:05,957 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:05,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-23 17:26:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:06,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:26:06,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:26:06,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:06,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:06,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324272508] [2021-11-23 17:26:06,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324272508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:06,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:06,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:26:06,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7562415] [2021-11-23 17:26:06,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:06,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:26:06,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:06,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:26:06,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:06,498 INFO L87 Difference]: Start difference. First operand 3352 states and 4352 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:06,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:06,889 INFO L93 Difference]: Finished difference Result 5549 states and 7432 transitions. [2021-11-23 17:26:06,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:26:06,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 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 101 [2021-11-23 17:26:06,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:06,897 INFO L225 Difference]: With dead ends: 5549 [2021-11-23 17:26:06,897 INFO L226 Difference]: Without dead ends: 4820 [2021-11-23 17:26:06,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:06,899 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 250 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:06,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 408 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:26:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4820 states. [2021-11-23 17:26:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4820 to 4087. [2021-11-23 17:26:07,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4087 states, 4086 states have (on average 1.3000489476260402) internal successors, (5312), 4086 states have internal predecessors, (5312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 5312 transitions. [2021-11-23 17:26:07,239 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 5312 transitions. Word has length 101 [2021-11-23 17:26:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:07,239 INFO L470 AbstractCegarLoop]: Abstraction has 4087 states and 5312 transitions. [2021-11-23 17:26:07,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 5312 transitions. [2021-11-23 17:26:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 17:26:07,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:07,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:07,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:07,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:07,442 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:26:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:07,442 INFO L85 PathProgramCache]: Analyzing trace with hash -783672287, now seen corresponding path program 1 times [2021-11-23 17:26:07,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:07,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985644603] [2021-11-23 17:26:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:07,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:07,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:07,448 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:07,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-23 17:26:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:07,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 17:26:07,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:11,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:13,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:13,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985644603] [2021-11-23 17:26:13,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985644603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:13,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [28073369] [2021-11-23 17:26:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:13,464 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:13,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:13,465 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:13,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-23 17:26:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:13,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 17:26:13,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:26:16,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:16,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [28073369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:16,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:26:16,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [22, 17] total 49 [2021-11-23 17:26:16,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288787538] [2021-11-23 17:26:16,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:16,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 17:26:16,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 17:26:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2082, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 17:26:16,444 INFO L87 Difference]: Start difference. First operand 4087 states and 5312 transitions. Second operand has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 17 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:17,062 INFO L93 Difference]: Finished difference Result 5309 states and 6950 transitions. [2021-11-23 17:26:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 17:26:17,063 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 17 states have internal predecessors, (96), 0 states have call successors, (0), 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 102 [2021-11-23 17:26:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:17,071 INFO L225 Difference]: With dead ends: 5309 [2021-11-23 17:26:17,072 INFO L226 Difference]: Without dead ends: 4042 [2021-11-23 17:26:17,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=291, Invalid=2159, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 17:26:17,076 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 38 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:17,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 910 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 304 Unchecked, 0.1s Time] [2021-11-23 17:26:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4042 states. [2021-11-23 17:26:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4042 to 4042. [2021-11-23 17:26:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4042 states, 4041 states have (on average 1.3026478594407325) internal successors, (5264), 4041 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4042 states to 4042 states and 5264 transitions. [2021-11-23 17:26:17,553 INFO L78 Accepts]: Start accepts. Automaton has 4042 states and 5264 transitions. Word has length 102 [2021-11-23 17:26:17,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:17,554 INFO L470 AbstractCegarLoop]: Abstraction has 4042 states and 5264 transitions. [2021-11-23 17:26:17,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 17 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:17,554 INFO L276 IsEmpty]: Start isEmpty. Operand 4042 states and 5264 transitions. [2021-11-23 17:26:17,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 17:26:17,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:17,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:17,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:17,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2021-11-23 17:26:17,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:17,971 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:26:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:17,971 INFO L85 PathProgramCache]: Analyzing trace with hash 576870491, now seen corresponding path program 1 times [2021-11-23 17:26:17,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:17,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421280624] [2021-11-23 17:26:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:17,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:17,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:17,972 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:17,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-23 17:26:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:18,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:26:18,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:19,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:19,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:19,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421280624] [2021-11-23 17:26:19,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421280624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:19,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1221471061] [2021-11-23 17:26:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:19,981 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:19,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:19,982 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:19,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-23 17:26:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:20,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:26:20,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:21,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:21,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1221471061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:21,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253490977] [2021-11-23 17:26:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:21,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:21,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:21,852 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:21,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-23 17:26:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:21,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:26:21,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:23,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:23,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253490977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:23,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:26:23,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2021-11-23 17:26:23,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775384362] [2021-11-23 17:26:23,617 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:26:23,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:26:23,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:26:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:26:23,619 INFO L87 Difference]: Start difference. First operand 4042 states and 5264 transitions. Second operand has 16 states, 16 states have (on average 12.3125) internal successors, (197), 15 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:24,988 INFO L93 Difference]: Finished difference Result 11313 states and 14897 transitions. [2021-11-23 17:26:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 17:26:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.3125) internal successors, (197), 15 states have internal predecessors, (197), 0 states have call successors, (0), 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 102 [2021-11-23 17:26:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:25,005 INFO L225 Difference]: With dead ends: 11313 [2021-11-23 17:26:25,006 INFO L226 Difference]: Without dead ends: 7676 [2021-11-23 17:26:25,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 595 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:26:25,013 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 345 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:25,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1728 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 248 Invalid, 0 Unknown, 419 Unchecked, 0.2s Time] [2021-11-23 17:26:25,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-11-23 17:26:25,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 3840. [2021-11-23 17:26:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3840 states, 3839 states have (on average 1.3050273508726231) internal successors, (5010), 3839 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:25,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3840 states to 3840 states and 5010 transitions. [2021-11-23 17:26:25,540 INFO L78 Accepts]: Start accepts. Automaton has 3840 states and 5010 transitions. Word has length 102 [2021-11-23 17:26:25,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:25,541 INFO L470 AbstractCegarLoop]: Abstraction has 3840 states and 5010 transitions. [2021-11-23 17:26:25,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.3125) internal successors, (197), 15 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3840 states and 5010 transitions. [2021-11-23 17:26:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 17:26:25,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:25,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:25,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:25,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:25,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:26,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:26,157 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:26:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:26,157 INFO L85 PathProgramCache]: Analyzing trace with hash -843570899, now seen corresponding path program 1 times [2021-11-23 17:26:26,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:26,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642100272] [2021-11-23 17:26:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:26,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:26,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:26,159 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:26,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-23 17:26:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:26,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:26:26,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:27,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:28,273 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:28,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642100272] [2021-11-23 17:26:28,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642100272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:28,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1673197097] [2021-11-23 17:26:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:28,274 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:28,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:28,274 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:28,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-11-23 17:26:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:28,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:26:28,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:29,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:30,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1673197097] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:30,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391416077] [2021-11-23 17:26:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:30,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:30,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:30,422 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:30,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-23 17:26:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:30,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:26:30,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:32,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:32,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391416077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:32,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:26:32,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 21 [2021-11-23 17:26:32,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391691313] [2021-11-23 17:26:32,428 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:26:32,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 17:26:32,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 17:26:32,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:26:32,430 INFO L87 Difference]: Start difference. First operand 3840 states and 5010 transitions. Second operand has 22 states, 22 states have (on average 8.681818181818182) internal successors, (191), 21 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:35,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:35,180 INFO L93 Difference]: Finished difference Result 14813 states and 19352 transitions. [2021-11-23 17:26:35,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-23 17:26:35,181 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.681818181818182) internal successors, (191), 21 states have internal predecessors, (191), 0 states have call successors, (0), 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 102 [2021-11-23 17:26:35,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:35,201 INFO L225 Difference]: With dead ends: 14813 [2021-11-23 17:26:35,201 INFO L226 Difference]: Without dead ends: 11196 [2021-11-23 17:26:35,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=454, Invalid=2852, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 17:26:35,211 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 840 mSDsluCounter, 2796 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 3069 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1068 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:35,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 3069 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 726 Invalid, 0 Unknown, 1068 Unchecked, 0.5s Time] [2021-11-23 17:26:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11196 states. [2021-11-23 17:26:36,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11196 to 4875. [2021-11-23 17:26:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.300779647107099) internal successors, (6340), 4874 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:36,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 6340 transitions. [2021-11-23 17:26:36,031 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 6340 transitions. Word has length 102 [2021-11-23 17:26:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:36,032 INFO L470 AbstractCegarLoop]: Abstraction has 4875 states and 6340 transitions. [2021-11-23 17:26:36,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.681818181818182) internal successors, (191), 21 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 6340 transitions. [2021-11-23 17:26:36,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 17:26:36,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:36,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:36,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:36,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:36,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:36,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:36,635 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:26:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1853943335, now seen corresponding path program 1 times [2021-11-23 17:26:36,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:36,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288087288] [2021-11-23 17:26:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:36,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:36,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:36,637 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:36,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-23 17:26:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:36,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 17:26:36,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:41,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:42,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:42,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288087288] [2021-11-23 17:26:42,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288087288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:42,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1811684693] [2021-11-23 17:26:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:42,863 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:42,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:42,864 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:42,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-23 17:26:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:43,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 17:26:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:48,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:50,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1811684693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:50,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833395706] [2021-11-23 17:26:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:50,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:50,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:50,239 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:50,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-23 17:26:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:50,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:26:50,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:56,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:58,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833395706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:58,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:26:58,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 24, 20, 19, 14] total 83 [2021-11-23 17:26:58,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750792005] [2021-11-23 17:26:58,217 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:26:58,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-23 17:26:58,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:58,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-23 17:26:58,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=6187, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 17:26:58,221 INFO L87 Difference]: Start difference. First operand 4875 states and 6340 transitions. Second operand has 83 states, 83 states have (on average 5.349397590361446) internal successors, (444), 83 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:03,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:03,139 INFO L93 Difference]: Finished difference Result 13279 states and 17190 transitions. [2021-11-23 17:27:03,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 17:27:03,139 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 5.349397590361446) internal successors, (444), 83 states have internal predecessors, (444), 0 states have call successors, (0), 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 103 [2021-11-23 17:27:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:03,151 INFO L225 Difference]: With dead ends: 13279 [2021-11-23 17:27:03,151 INFO L226 Difference]: Without dead ends: 8497 [2021-11-23 17:27:03,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 529 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3697 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=945, Invalid=8561, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 17:27:03,161 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 458 mSDsluCounter, 3887 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 4035 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:03,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 4035 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 936 Invalid, 0 Unknown, 295 Unchecked, 1.1s Time] [2021-11-23 17:27:03,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8497 states. [2021-11-23 17:27:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8497 to 4923. [2021-11-23 17:27:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4923 states, 4922 states have (on average 1.2982527427874848) internal successors, (6390), 4922 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4923 states to 4923 states and 6390 transitions. [2021-11-23 17:27:03,794 INFO L78 Accepts]: Start accepts. Automaton has 4923 states and 6390 transitions. Word has length 103 [2021-11-23 17:27:03,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:03,794 INFO L470 AbstractCegarLoop]: Abstraction has 4923 states and 6390 transitions. [2021-11-23 17:27:03,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 5.349397590361446) internal successors, (444), 83 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4923 states and 6390 transitions. [2021-11-23 17:27:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 17:27:03,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:03,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:03,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-23 17:27:04,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2021-11-23 17:27:04,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:04,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:04,424 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:27:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:04,425 INFO L85 PathProgramCache]: Analyzing trace with hash 558978337, now seen corresponding path program 1 times [2021-11-23 17:27:04,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:04,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091189974] [2021-11-23 17:27:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:04,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:04,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:04,427 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:04,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-23 17:27:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:04,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:27:04,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:05,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:05,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:05,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091189974] [2021-11-23 17:27:05,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091189974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:05,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1113542465] [2021-11-23 17:27:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:05,761 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:05,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:05,762 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:05,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2021-11-23 17:27:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:06,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:27:06,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:06,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:06,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1113542465] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:06,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643435983] [2021-11-23 17:27:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:06,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:06,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:06,798 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:06,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-23 17:27:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:06,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:27:06,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:07,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:07,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643435983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:07,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:07,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12, 9, 10, 9] total 21 [2021-11-23 17:27:07,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914921119] [2021-11-23 17:27:07,670 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:07,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 17:27:07,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:07,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 17:27:07,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-23 17:27:07,672 INFO L87 Difference]: Start difference. First operand 4923 states and 6390 transitions. Second operand has 21 states, 21 states have (on average 10.142857142857142) internal successors, (213), 21 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:08,663 INFO L93 Difference]: Finished difference Result 10473 states and 13613 transitions. [2021-11-23 17:27:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 17:27:08,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 10.142857142857142) internal successors, (213), 21 states have internal predecessors, (213), 0 states have call successors, (0), 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 103 [2021-11-23 17:27:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:08,670 INFO L225 Difference]: With dead ends: 10473 [2021-11-23 17:27:08,670 INFO L226 Difference]: Without dead ends: 5680 [2021-11-23 17:27:08,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:27:08,675 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 136 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:08,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1514 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2021-11-23 17:27:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5680 states. [2021-11-23 17:27:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5680 to 4960. [2021-11-23 17:27:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 1.295825771324864) internal successors, (6426), 4959 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 6426 transitions. [2021-11-23 17:27:09,304 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 6426 transitions. Word has length 103 [2021-11-23 17:27:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:09,304 INFO L470 AbstractCegarLoop]: Abstraction has 4960 states and 6426 transitions. [2021-11-23 17:27:09,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.142857142857142) internal successors, (213), 21 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 6426 transitions. [2021-11-23 17:27:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 17:27:09,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:09,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:09,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:09,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-23 17:27:09,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2021-11-23 17:27:09,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:09,906 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:27:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash -535181359, now seen corresponding path program 1 times [2021-11-23 17:27:09,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:09,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561755592] [2021-11-23 17:27:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:09,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:09,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:09,908 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:09,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-23 17:27:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:10,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:27:10,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:10,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:11,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:11,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561755592] [2021-11-23 17:27:11,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561755592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:11,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1452263084] [2021-11-23 17:27:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:11,435 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:11,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:11,436 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:11,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2021-11-23 17:27:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:11,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:27:11,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:12,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:12,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1452263084] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:12,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763674065] [2021-11-23 17:27:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:12,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:12,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:12,780 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:12,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-23 17:27:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:12,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:27:12,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:16,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:16,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763674065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:16,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:16,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 13, 10, 18, 12] total 40 [2021-11-23 17:27:16,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598240540] [2021-11-23 17:27:16,829 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:16,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 17:27:16,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:16,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 17:27:16,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 17:27:16,831 INFO L87 Difference]: Start difference. First operand 4960 states and 6426 transitions. Second operand has 40 states, 40 states have (on average 7.475) internal successors, (299), 40 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:18,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:18,149 INFO L93 Difference]: Finished difference Result 11691 states and 15169 transitions. [2021-11-23 17:27:18,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 17:27:18,150 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 7.475) internal successors, (299), 40 states have internal predecessors, (299), 0 states have call successors, (0), 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 103 [2021-11-23 17:27:18,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:18,159 INFO L225 Difference]: With dead ends: 11691 [2021-11-23 17:27:18,159 INFO L226 Difference]: Without dead ends: 6909 [2021-11-23 17:27:18,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 576 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 17:27:18,166 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 220 mSDsluCounter, 2824 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 3018 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:18,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 3018 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 181 Invalid, 0 Unknown, 266 Unchecked, 0.2s Time] [2021-11-23 17:27:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6909 states. [2021-11-23 17:27:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6909 to 5039. [2021-11-23 17:27:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5039 states, 5038 states have (on average 1.2935688765383089) internal successors, (6517), 5038 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5039 states to 5039 states and 6517 transitions. [2021-11-23 17:27:18,854 INFO L78 Accepts]: Start accepts. Automaton has 5039 states and 6517 transitions. Word has length 103 [2021-11-23 17:27:18,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:18,854 INFO L470 AbstractCegarLoop]: Abstraction has 5039 states and 6517 transitions. [2021-11-23 17:27:18,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 7.475) internal successors, (299), 40 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 5039 states and 6517 transitions. [2021-11-23 17:27:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 17:27:18,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:18,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:18,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:19,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-11-23 17:27:19,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-23 17:27:19,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:19,460 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:27:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash 669636933, now seen corresponding path program 1 times [2021-11-23 17:27:19,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:19,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340822383] [2021-11-23 17:27:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:19,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:19,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:19,462 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:19,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-23 17:27:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:19,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 17:27:19,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:23,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:25,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:25,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340822383] [2021-11-23 17:27:25,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340822383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:25,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1446410343] [2021-11-23 17:27:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:25,736 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:25,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:25,737 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:25,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2021-11-23 17:27:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:25,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:27:25,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:28,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:30,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1446410343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:30,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461644947] [2021-11-23 17:27:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:30,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:30,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:30,156 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:30,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-23 17:27:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:30,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 17:27:30,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:35,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:38,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461644947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:38,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:27:38,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 17, 16, 21, 21] total 109 [2021-11-23 17:27:38,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129654765] [2021-11-23 17:27:38,108 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:27:38,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-23 17:27:38,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:38,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-23 17:27:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=10552, Unknown=0, NotChecked=0, Total=11772 [2021-11-23 17:27:38,113 INFO L87 Difference]: Start difference. First operand 5039 states and 6517 transitions. Second operand has 109 states, 109 states have (on average 4.798165137614679) internal successors, (523), 109 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:45,053 INFO L93 Difference]: Finished difference Result 11499 states and 14794 transitions. [2021-11-23 17:27:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-23 17:27:45,053 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 4.798165137614679) internal successors, (523), 109 states have internal predecessors, (523), 0 states have call successors, (0), 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 103 [2021-11-23 17:27:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:45,063 INFO L225 Difference]: With dead ends: 11499 [2021-11-23 17:27:45,063 INFO L226 Difference]: Without dead ends: 8560 [2021-11-23 17:27:45,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 515 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6395 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=2143, Invalid=15413, Unknown=0, NotChecked=0, Total=17556 [2021-11-23 17:27:45,071 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 1492 mSDsluCounter, 7187 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 7376 SdHoareTripleChecker+Invalid, 3387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1603 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:45,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1492 Valid, 7376 Invalid, 3387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1740 Invalid, 0 Unknown, 1603 Unchecked, 1.8s Time] [2021-11-23 17:27:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8560 states. [2021-11-23 17:27:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8560 to 5029. [2021-11-23 17:27:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5029 states, 5028 states have (on average 1.2935560859188544) internal successors, (6504), 5028 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5029 states to 5029 states and 6504 transitions. [2021-11-23 17:27:45,776 INFO L78 Accepts]: Start accepts. Automaton has 5029 states and 6504 transitions. Word has length 103 [2021-11-23 17:27:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:45,776 INFO L470 AbstractCegarLoop]: Abstraction has 5029 states and 6504 transitions. [2021-11-23 17:27:45,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 4.798165137614679) internal successors, (523), 109 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:27:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 5029 states and 6504 transitions. [2021-11-23 17:27:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 17:27:45,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:45,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:27:45,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-11-23 17:27:45,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2021-11-23 17:27:46,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:46,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:46,378 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:27:46,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:46,379 INFO L85 PathProgramCache]: Analyzing trace with hash 255957823, now seen corresponding path program 1 times [2021-11-23 17:27:46,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:46,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630177090] [2021-11-23 17:27:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:46,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:46,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:46,380 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:46,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-11-23 17:27:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:46,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 17:27:46,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:51,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:53,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:53,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630177090] [2021-11-23 17:27:53,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630177090] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:53,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1112801204] [2021-11-23 17:27:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:53,535 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:53,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:53,536 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:53,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2021-11-23 17:27:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:53,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 17:27:53,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:00,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:03,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1112801204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:03,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638249871] [2021-11-23 17:28:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:03,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:28:03,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:28:03,251 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:28:03,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-23 17:28:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:03,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 17:28:03,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:08,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:12,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638249871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:12,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:28:12,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 25, 22, 25, 25] total 109 [2021-11-23 17:28:12,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186338679] [2021-11-23 17:28:12,375 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:28:12,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-23 17:28:12,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:12,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-23 17:28:12,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=10636, Unknown=0, NotChecked=0, Total=11772 [2021-11-23 17:28:12,379 INFO L87 Difference]: Start difference. First operand 5029 states and 6504 transitions. Second operand has 109 states, 109 states have (on average 4.293577981651376) internal successors, (468), 109 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:46,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:28:46,299 INFO L93 Difference]: Finished difference Result 29061 states and 37542 transitions. [2021-11-23 17:28:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-23 17:28:46,299 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 4.293577981651376) internal successors, (468), 109 states have internal predecessors, (468), 0 states have call successors, (0), 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 103 [2021-11-23 17:28:46,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:28:46,332 INFO L225 Difference]: With dead ends: 29061 [2021-11-23 17:28:46,332 INFO L226 Difference]: Without dead ends: 24279 [2021-11-23 17:28:46,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 517 SyntacticMatches, 4 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12457 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=3540, Invalid=34290, Unknown=0, NotChecked=0, Total=37830 [2021-11-23 17:28:46,346 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 2887 mSDsluCounter, 9909 mSDsCounter, 0 mSdLazyCounter, 4265 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2887 SdHoareTripleChecker+Valid, 10165 SdHoareTripleChecker+Invalid, 6472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 4265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2030 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:28:46,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2887 Valid, 10165 Invalid, 6472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 4265 Invalid, 0 Unknown, 2030 Unchecked, 6.3s Time] [2021-11-23 17:28:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24279 states. [2021-11-23 17:28:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24279 to 5119. [2021-11-23 17:28:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5119 states, 5118 states have (on average 1.2895662368112544) internal successors, (6600), 5118 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5119 states to 5119 states and 6600 transitions. [2021-11-23 17:28:47,527 INFO L78 Accepts]: Start accepts. Automaton has 5119 states and 6600 transitions. Word has length 103 [2021-11-23 17:28:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:28:47,527 INFO L470 AbstractCegarLoop]: Abstraction has 5119 states and 6600 transitions. [2021-11-23 17:28:47,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 4.293577981651376) internal successors, (468), 109 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:28:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5119 states and 6600 transitions. [2021-11-23 17:28:47,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 17:28:47,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:28:47,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:28:47,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-11-23 17:28:47,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2021-11-23 17:28:47,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2021-11-23 17:28:48,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:28:48,133 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:28:48,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:28:48,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1039007175, now seen corresponding path program 1 times [2021-11-23 17:28:48,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:28:48,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506808295] [2021-11-23 17:28:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:48,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:28:48,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:28:48,135 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:28:48,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-23 17:28:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:48,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 17:28:48,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:52,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:28:54,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:28:54,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506808295] [2021-11-23 17:28:54,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506808295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:54,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [170838427] [2021-11-23 17:28:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:54,531 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:28:54,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:28:54,532 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:28:54,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2021-11-23 17:28:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:54,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 17:28:54,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:00,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:02,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [170838427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:02,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109599301] [2021-11-23 17:29:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:02,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:29:02,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:29:02,012 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:29:02,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-23 17:29:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:02,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:29:02,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:07,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:08,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109599301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:08,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:29:08,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 24, 22, 16, 16] total 81 [2021-11-23 17:29:08,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865672414] [2021-11-23 17:29:08,729 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:29:08,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-23 17:29:08,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:29:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-23 17:29:08,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=5933, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 17:29:08,731 INFO L87 Difference]: Start difference. First operand 5119 states and 6600 transitions. Second operand has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:29:18,323 INFO L93 Difference]: Finished difference Result 17160 states and 22321 transitions. [2021-11-23 17:29:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-23 17:29:18,324 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 0 states have call successors, (0), 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 103 [2021-11-23 17:29:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:29:18,352 INFO L225 Difference]: With dead ends: 17160 [2021-11-23 17:29:18,352 INFO L226 Difference]: Without dead ends: 15174 [2021-11-23 17:29:18,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 546 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5116 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1077, Invalid=12495, Unknown=0, NotChecked=0, Total=13572 [2021-11-23 17:29:18,360 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 748 mSDsluCounter, 7378 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 7627 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1171 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:29:18,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 7627 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1681 Invalid, 0 Unknown, 1171 Unchecked, 1.9s Time] [2021-11-23 17:29:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15174 states. [2021-11-23 17:29:19,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15174 to 5145. [2021-11-23 17:29:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5145 states, 5144 states have (on average 1.2898522550544322) internal successors, (6635), 5144 states have internal predecessors, (6635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:19,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5145 states to 5145 states and 6635 transitions. [2021-11-23 17:29:19,562 INFO L78 Accepts]: Start accepts. Automaton has 5145 states and 6635 transitions. Word has length 103 [2021-11-23 17:29:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:29:19,562 INFO L470 AbstractCegarLoop]: Abstraction has 5145 states and 6635 transitions. [2021-11-23 17:29:19,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:19,562 INFO L276 IsEmpty]: Start isEmpty. Operand 5145 states and 6635 transitions. [2021-11-23 17:29:19,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 17:29:19,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:29:19,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:29:19,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-23 17:29:19,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2021-11-23 17:29:19,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2021-11-23 17:29:20,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:29:20,165 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:29:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:29:20,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1970892402, now seen corresponding path program 1 times [2021-11-23 17:29:20,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:29:20,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648488916] [2021-11-23 17:29:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:20,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:29:20,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:29:20,167 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:29:20,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-11-23 17:29:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:20,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:29:20,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:29:20,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:29:20,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:29:20,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648488916] [2021-11-23 17:29:20,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648488916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:20,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [873130836] [2021-11-23 17:29:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:20,959 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:29:20,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:29:20,960 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:29:20,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2021-11-23 17:29:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:21,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:29:21,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:29:21,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:29:21,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [873130836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:21,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179524244] [2021-11-23 17:29:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:21,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:29:21,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:29:21,855 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:29:21,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-23 17:29:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:21,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:29:21,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:29:22,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:29:22,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179524244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:22,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:29:22,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2021-11-23 17:29:22,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757844144] [2021-11-23 17:29:22,701 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:29:22,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:29:22,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:29:22,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:29:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:29:22,702 INFO L87 Difference]: Start difference. First operand 5145 states and 6635 transitions. Second operand has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:29:24,352 INFO L93 Difference]: Finished difference Result 12461 states and 16027 transitions. [2021-11-23 17:29:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:29:24,353 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 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 104 [2021-11-23 17:29:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:29:24,361 INFO L225 Difference]: With dead ends: 12461 [2021-11-23 17:29:24,362 INFO L226 Difference]: Without dead ends: 7679 [2021-11-23 17:29:24,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 606 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:29:24,367 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 366 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:29:24,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 654 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-11-23 17:29:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2021-11-23 17:29:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 5407. [2021-11-23 17:29:25,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5407 states, 5406 states have (on average 1.2844987051424344) internal successors, (6944), 5406 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 6944 transitions. [2021-11-23 17:29:25,582 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 6944 transitions. Word has length 104 [2021-11-23 17:29:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:29:25,582 INFO L470 AbstractCegarLoop]: Abstraction has 5407 states and 6944 transitions. [2021-11-23 17:29:25,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 6944 transitions. [2021-11-23 17:29:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 17:29:25,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:29:25,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:29:25,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-11-23 17:29:25,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (76)] Ended with exit code 0 [2021-11-23 17:29:25,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (77)] Ended with exit code 0 [2021-11-23 17:29:26,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:29:26,185 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:29:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:29:26,185 INFO L85 PathProgramCache]: Analyzing trace with hash -326704416, now seen corresponding path program 1 times [2021-11-23 17:29:26,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:29:26,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121080881] [2021-11-23 17:29:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:26,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:29:26,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:29:26,189 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:29:26,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-11-23 17:29:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:26,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:29:26,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:29,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:31,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:29:31,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121080881] [2021-11-23 17:29:31,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121080881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:31,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1466037278] [2021-11-23 17:29:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:31,198 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:29:31,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:29:31,199 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:29:31,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2021-11-23 17:29:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:31,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:29:31,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:35,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:35,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1466037278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:35,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620442230] [2021-11-23 17:29:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:35,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:29:35,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:29:35,913 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:29:35,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-23 17:29:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:36,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:29:36,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:39,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:40,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620442230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:40,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:29:40,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 16, 15, 14] total 36 [2021-11-23 17:29:40,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769532876] [2021-11-23 17:29:40,469 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:29:40,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 17:29:40,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:29:40,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 17:29:40,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 17:29:40,470 INFO L87 Difference]: Start difference. First operand 5407 states and 6944 transitions. Second operand has 36 states, 36 states have (on average 6.5) internal successors, (234), 36 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:41,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:29:41,902 INFO L93 Difference]: Finished difference Result 7347 states and 9532 transitions. [2021-11-23 17:29:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 17:29:41,903 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.5) internal successors, (234), 36 states have internal predecessors, (234), 0 states have call successors, (0), 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 104 [2021-11-23 17:29:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:29:41,908 INFO L225 Difference]: With dead ends: 7347 [2021-11-23 17:29:41,908 INFO L226 Difference]: Without dead ends: 5417 [2021-11-23 17:29:41,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 583 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 17:29:41,911 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 91 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:29:41,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1784 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 176 Unchecked, 0.1s Time] [2021-11-23 17:29:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2021-11-23 17:29:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 5413. [2021-11-23 17:29:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5413 states, 5412 states have (on average 1.2845528455284554) internal successors, (6952), 5412 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5413 states to 5413 states and 6952 transitions. [2021-11-23 17:29:42,999 INFO L78 Accepts]: Start accepts. Automaton has 5413 states and 6952 transitions. Word has length 104 [2021-11-23 17:29:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:29:42,999 INFO L470 AbstractCegarLoop]: Abstraction has 5413 states and 6952 transitions. [2021-11-23 17:29:42,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.5) internal successors, (234), 36 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 5413 states and 6952 transitions. [2021-11-23 17:29:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 17:29:43,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:29:43,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:29:43,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2021-11-23 17:29:43,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-11-23 17:29:43,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2021-11-23 17:29:43,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:29:43,601 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:29:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:29:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash 29897328, now seen corresponding path program 1 times [2021-11-23 17:29:43,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:29:43,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362937845] [2021-11-23 17:29:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:43,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:29:43,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:29:43,603 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:29:43,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-11-23 17:29:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:43,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:29:43,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:46,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:47,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:29:47,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362937845] [2021-11-23 17:29:47,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362937845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:47,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1269022725] [2021-11-23 17:29:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:47,235 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:29:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:29:47,236 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:29:47,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2021-11-23 17:29:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:47,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:29:47,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:49,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:51,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1269022725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:51,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534403961] [2021-11-23 17:29:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:51,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:29:51,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:29:51,108 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:29:51,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-23 17:29:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:51,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:29:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:53,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:29:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:53,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534403961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:29:53,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:29:53,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17, 16, 16, 16] total 65 [2021-11-23 17:29:53,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719743409] [2021-11-23 17:29:53,677 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:29:53,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-23 17:29:53,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:29:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-23 17:29:53,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=3838, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 17:29:53,679 INFO L87 Difference]: Start difference. First operand 5413 states and 6952 transitions. Second operand has 65 states, 65 states have (on average 6.553846153846154) internal successors, (426), 65 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:57,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:29:57,638 INFO L93 Difference]: Finished difference Result 8371 states and 10842 transitions. [2021-11-23 17:29:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 17:29:57,639 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 6.553846153846154) internal successors, (426), 65 states have internal predecessors, (426), 0 states have call successors, (0), 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 104 [2021-11-23 17:29:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:29:57,647 INFO L225 Difference]: With dead ends: 8371 [2021-11-23 17:29:57,647 INFO L226 Difference]: Without dead ends: 6430 [2021-11-23 17:29:57,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 561 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2181 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=568, Invalid=5912, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 17:29:57,652 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 250 mSDsluCounter, 4045 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 4218 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:29:57,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 4218 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 508 Invalid, 0 Unknown, 426 Unchecked, 0.4s Time] [2021-11-23 17:29:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6430 states. [2021-11-23 17:29:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6430 to 5408. [2021-11-23 17:29:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5408 states, 5407 states have (on average 1.2844460884039208) internal successors, (6945), 5407 states have internal predecessors, (6945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5408 states to 5408 states and 6945 transitions. [2021-11-23 17:29:58,797 INFO L78 Accepts]: Start accepts. Automaton has 5408 states and 6945 transitions. Word has length 104 [2021-11-23 17:29:58,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:29:58,798 INFO L470 AbstractCegarLoop]: Abstraction has 5408 states and 6945 transitions. [2021-11-23 17:29:58,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 6.553846153846154) internal successors, (426), 65 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:29:58,798 INFO L276 IsEmpty]: Start isEmpty. Operand 5408 states and 6945 transitions. [2021-11-23 17:29:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 17:29:58,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:29:58,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:29:58,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2021-11-23 17:29:59,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0 [2021-11-23 17:29:59,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-23 17:29:59,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:29:59,400 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:29:59,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:29:59,401 INFO L85 PathProgramCache]: Analyzing trace with hash 967227511, now seen corresponding path program 1 times [2021-11-23 17:29:59,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:29:59,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143809114] [2021-11-23 17:29:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:29:59,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:29:59,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:29:59,402 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:29:59,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2021-11-23 17:29:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:29:59,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:29:59,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:29:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:29:59,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:00,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:00,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143809114] [2021-11-23 17:30:00,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143809114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:00,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1339129796] [2021-11-23 17:30:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:00,100 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:00,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:30:00,101 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:30:00,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2021-11-23 17:30:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:00,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:30:00,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:02,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:02,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1339129796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:02,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121799430] [2021-11-23 17:30:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:02,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:30:02,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:30:02,982 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:30:02,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-23 17:30:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:03,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 17:30:03,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:08,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:09,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121799430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:09,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:30:09,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14, 12, 23, 17] total 65 [2021-11-23 17:30:09,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919720698] [2021-11-23 17:30:09,642 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:30:09,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-23 17:30:09,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:30:09,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-23 17:30:09,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=3567, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 17:30:09,643 INFO L87 Difference]: Start difference. First operand 5408 states and 6945 transitions. Second operand has 65 states, 65 states have (on average 6.584615384615384) internal successors, (428), 65 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:11,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:30:11,518 INFO L93 Difference]: Finished difference Result 10571 states and 13623 transitions. [2021-11-23 17:30:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 17:30:11,519 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 6.584615384615384) internal successors, (428), 65 states have internal predecessors, (428), 0 states have call successors, (0), 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 104 [2021-11-23 17:30:11,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:30:11,525 INFO L225 Difference]: With dead ends: 10571 [2021-11-23 17:30:11,525 INFO L226 Difference]: Without dead ends: 5704 [2021-11-23 17:30:11,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 553 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1756 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=715, Invalid=3977, Unknown=0, NotChecked=0, Total=4692 [2021-11-23 17:30:11,531 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 435 mSDsluCounter, 3259 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 3418 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:30:11,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 3418 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 505 Invalid, 0 Unknown, 387 Unchecked, 0.4s Time] [2021-11-23 17:30:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2021-11-23 17:30:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5360. [2021-11-23 17:30:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 5359 states have (on average 1.2864340362007838) internal successors, (6894), 5359 states have internal predecessors, (6894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 6894 transitions. [2021-11-23 17:30:12,625 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 6894 transitions. Word has length 104 [2021-11-23 17:30:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:30:12,625 INFO L470 AbstractCegarLoop]: Abstraction has 5360 states and 6894 transitions. [2021-11-23 17:30:12,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 6.584615384615384) internal successors, (428), 65 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:30:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 6894 transitions. [2021-11-23 17:30:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 17:30:12,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:30:12,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:30:12,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (86)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:12,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2021-11-23 17:30:13,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-23 17:30:13,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:30:13,229 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:30:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:30:13,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2072817428, now seen corresponding path program 1 times [2021-11-23 17:30:13,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:30:13,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078222485] [2021-11-23 17:30:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:13,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:30:13,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:30:13,230 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:30:13,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2021-11-23 17:30:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:13,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 17:30:13,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:19,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:20,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:30:20,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078222485] [2021-11-23 17:30:20,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078222485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:20,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1673140847] [2021-11-23 17:30:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:20,794 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:30:20,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:30:20,795 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:30:20,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2021-11-23 17:30:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:21,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 17:30:21,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:29,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:31,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1673140847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:31,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28328917] [2021-11-23 17:30:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:30:31,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:30:31,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:30:31,694 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:30:31,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-23 17:30:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:30:31,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:30:31,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:30:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:34,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:30:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:30:35,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28328917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:30:35,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:30:35,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 25, 22, 16, 15] total 87 [2021-11-23 17:30:35,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288482754] [2021-11-23 17:30:35,704 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:30:35,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-23 17:30:35,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:30:35,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-23 17:30:35,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=790, Invalid=6692, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 17:30:35,706 INFO L87 Difference]: Start difference. First operand 5360 states and 6894 transitions. Second operand has 87 states, 87 states have (on average 5.0) internal successors, (435), 87 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:00,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:00,969 INFO L93 Difference]: Finished difference Result 27492 states and 35672 transitions. [2021-11-23 17:31:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-23 17:31:00,970 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 5.0) internal successors, (435), 87 states have internal predecessors, (435), 0 states have call successors, (0), 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 104 [2021-11-23 17:31:00,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:00,998 INFO L225 Difference]: With dead ends: 27492 [2021-11-23 17:31:00,998 INFO L226 Difference]: Without dead ends: 24556 [2021-11-23 17:31:01,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 538 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9111 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=2553, Invalid=23853, Unknown=0, NotChecked=0, Total=26406 [2021-11-23 17:31:01,008 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 2690 mSDsluCounter, 9726 mSDsCounter, 0 mSdLazyCounter, 4084 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2690 SdHoareTripleChecker+Valid, 10034 SdHoareTripleChecker+Invalid, 6234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 4084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1998 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:01,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2690 Valid, 10034 Invalid, 6234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 4084 Invalid, 0 Unknown, 1998 Unchecked, 5.8s Time] [2021-11-23 17:31:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24556 states. [2021-11-23 17:31:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24556 to 5415. [2021-11-23 17:31:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5415 states, 5414 states have (on average 1.2848171407462134) internal successors, (6956), 5414 states have internal predecessors, (6956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5415 states to 5415 states and 6956 transitions. [2021-11-23 17:31:02,345 INFO L78 Accepts]: Start accepts. Automaton has 5415 states and 6956 transitions. Word has length 104 [2021-11-23 17:31:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:02,345 INFO L470 AbstractCegarLoop]: Abstraction has 5415 states and 6956 transitions. [2021-11-23 17:31:02,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 5.0) internal successors, (435), 87 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 5415 states and 6956 transitions. [2021-11-23 17:31:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 17:31:02,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:02,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:02,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (89)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:02,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:02,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2021-11-23 17:31:02,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:02,948 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:31:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash 927556669, now seen corresponding path program 1 times [2021-11-23 17:31:02,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:02,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565955435] [2021-11-23 17:31:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:02,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:02,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:02,949 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:02,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2021-11-23 17:31:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:03,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:31:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:03,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:03,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:03,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565955435] [2021-11-23 17:31:03,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565955435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:03,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [604723107] [2021-11-23 17:31:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:03,536 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:03,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:03,537 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:03,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2021-11-23 17:31:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:03,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:31:03,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:05,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:07,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [604723107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:07,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097361965] [2021-11-23 17:31:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:07,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:07,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:07,008 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:07,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-23 17:31:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:07,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 17:31:07,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:11,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:14,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097361965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:14,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:31:14,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 18, 17, 24, 22] total 82 [2021-11-23 17:31:14,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329254185] [2021-11-23 17:31:14,040 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:31:14,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-23 17:31:14,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:14,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-23 17:31:14,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=6122, Unknown=0, NotChecked=0, Total=6642 [2021-11-23 17:31:14,043 INFO L87 Difference]: Start difference. First operand 5415 states and 6956 transitions. Second operand has 82 states, 82 states have (on average 5.7439024390243905) internal successors, (471), 82 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:21,046 INFO L93 Difference]: Finished difference Result 10737 states and 13785 transitions. [2021-11-23 17:31:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 17:31:21,047 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 5.7439024390243905) internal successors, (471), 82 states have internal predecessors, (471), 0 states have call successors, (0), 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 104 [2021-11-23 17:31:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:21,055 INFO L225 Difference]: With dead ends: 10737 [2021-11-23 17:31:21,056 INFO L226 Difference]: Without dead ends: 8568 [2021-11-23 17:31:21,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 547 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 3620 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1139, Invalid=10633, Unknown=0, NotChecked=0, Total=11772 [2021-11-23 17:31:21,059 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 1228 mSDsluCounter, 8794 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 9085 SdHoareTripleChecker+Invalid, 3534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1407 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:21,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1228 Valid, 9085 Invalid, 3534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2085 Invalid, 0 Unknown, 1407 Unchecked, 1.9s Time] [2021-11-23 17:31:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8568 states. [2021-11-23 17:31:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8568 to 5384. [2021-11-23 17:31:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5384 states, 5383 states have (on average 1.284042355563812) internal successors, (6912), 5383 states have internal predecessors, (6912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5384 states to 5384 states and 6912 transitions. [2021-11-23 17:31:22,294 INFO L78 Accepts]: Start accepts. Automaton has 5384 states and 6912 transitions. Word has length 104 [2021-11-23 17:31:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:22,294 INFO L470 AbstractCegarLoop]: Abstraction has 5384 states and 6912 transitions. [2021-11-23 17:31:22,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 5.7439024390243905) internal successors, (471), 82 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5384 states and 6912 transitions. [2021-11-23 17:31:22,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 17:31:22,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:22,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:22,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-11-23 17:31:22,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (92)] Ended with exit code 0 [2021-11-23 17:31:22,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (91)] Ended with exit code 0 [2021-11-23 17:31:22,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:22,896 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:31:22,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash 333615981, now seen corresponding path program 1 times [2021-11-23 17:31:22,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:22,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248230643] [2021-11-23 17:31:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:22,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:22,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:22,898 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:22,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2021-11-23 17:31:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:23,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 17:31:23,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:24,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:25,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:25,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248230643] [2021-11-23 17:31:25,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248230643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:25,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [26055988] [2021-11-23 17:31:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:25,203 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:25,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:25,204 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:25,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2021-11-23 17:31:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:25,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:31:25,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:27,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:29,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [26055988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:29,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99998481] [2021-11-23 17:31:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:29,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:29,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:29,336 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:29,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-23 17:31:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:29,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:31:29,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:30,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:31,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99998481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:31,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:31:31,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19, 16, 11, 10] total 75 [2021-11-23 17:31:31,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99561202] [2021-11-23 17:31:31,375 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:31:31,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-23 17:31:31,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:31,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-23 17:31:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=4995, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 17:31:31,378 INFO L87 Difference]: Start difference. First operand 5384 states and 6912 transitions. Second operand has 75 states, 75 states have (on average 6.573333333333333) internal successors, (493), 75 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:41,122 INFO L93 Difference]: Finished difference Result 19403 states and 24933 transitions. [2021-11-23 17:31:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-23 17:31:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 6.573333333333333) internal successors, (493), 75 states have internal predecessors, (493), 0 states have call successors, (0), 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 104 [2021-11-23 17:31:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:41,143 INFO L225 Difference]: With dead ends: 19403 [2021-11-23 17:31:41,143 INFO L226 Difference]: Without dead ends: 16382 [2021-11-23 17:31:41,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 552 SyntacticMatches, 7 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1603, Invalid=12203, Unknown=0, NotChecked=0, Total=13806 [2021-11-23 17:31:41,148 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 1910 mSDsluCounter, 12233 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 12681 SdHoareTripleChecker+Invalid, 4315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1901 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:41,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1910 Valid, 12681 Invalid, 4315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2346 Invalid, 0 Unknown, 1901 Unchecked, 2.0s Time] [2021-11-23 17:31:41,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16382 states. [2021-11-23 17:31:42,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16382 to 7424. [2021-11-23 17:31:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7424 states, 7423 states have (on average 1.2873501279806008) internal successors, (9556), 7423 states have internal predecessors, (9556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7424 states to 7424 states and 9556 transitions. [2021-11-23 17:31:42,985 INFO L78 Accepts]: Start accepts. Automaton has 7424 states and 9556 transitions. Word has length 104 [2021-11-23 17:31:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:42,986 INFO L470 AbstractCegarLoop]: Abstraction has 7424 states and 9556 transitions. [2021-11-23 17:31:42,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 6.573333333333333) internal successors, (493), 75 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7424 states and 9556 transitions. [2021-11-23 17:31:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 17:31:42,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:42,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:42,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (95)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:43,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:43,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:43,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:43,588 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:31:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:43,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1461568025, now seen corresponding path program 1 times [2021-11-23 17:31:43,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:43,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304027769] [2021-11-23 17:31:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:43,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:43,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:43,590 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:43,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2021-11-23 17:31:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:43,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 17:31:43,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:47,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:49,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:49,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304027769] [2021-11-23 17:31:49,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304027769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:49,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [961582872] [2021-11-23 17:31:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:49,786 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:49,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:49,787 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:49,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2021-11-23 17:31:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:49,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:31:49,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:52,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:54,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [961582872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:54,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822353528] [2021-11-23 17:31:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:54,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:54,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:54,231 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:54,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-23 17:31:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:54,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 17:31:54,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:00,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:03,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822353528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:03,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:32:03,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 17, 16, 24, 23] total 114 [2021-11-23 17:32:03,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592351343] [2021-11-23 17:32:03,773 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:32:03,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-23 17:32:03,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:03,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-23 17:32:03,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=11603, Unknown=0, NotChecked=0, Total=12882 [2021-11-23 17:32:03,775 INFO L87 Difference]: Start difference. First operand 7424 states and 9556 transitions. Second operand has 114 states, 114 states have (on average 4.640350877192983) internal successors, (529), 114 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:14,002 INFO L93 Difference]: Finished difference Result 14841 states and 18987 transitions. [2021-11-23 17:32:14,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 17:32:14,002 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 4.640350877192983) internal successors, (529), 114 states have internal predecessors, (529), 0 states have call successors, (0), 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 104 [2021-11-23 17:32:14,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:14,017 INFO L225 Difference]: With dead ends: 14841 [2021-11-23 17:32:14,017 INFO L226 Difference]: Without dead ends: 12741 [2021-11-23 17:32:14,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6706 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=2322, Invalid=16584, Unknown=0, NotChecked=0, Total=18906 [2021-11-23 17:32:14,022 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 1010 mSDsluCounter, 7158 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 7365 SdHoareTripleChecker+Invalid, 3445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1444 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:14,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 7365 Invalid, 3445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1919 Invalid, 0 Unknown, 1444 Unchecked, 1.9s Time] [2021-11-23 17:32:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12741 states. [2021-11-23 17:32:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12741 to 7325. [2021-11-23 17:32:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7325 states, 7324 states have (on average 1.2885035499726925) internal successors, (9437), 7324 states have internal predecessors, (9437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7325 states to 7325 states and 9437 transitions. [2021-11-23 17:32:15,853 INFO L78 Accepts]: Start accepts. Automaton has 7325 states and 9437 transitions. Word has length 104 [2021-11-23 17:32:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:15,853 INFO L470 AbstractCegarLoop]: Abstraction has 7325 states and 9437 transitions. [2021-11-23 17:32:15,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 4.640350877192983) internal successors, (529), 114 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 7325 states and 9437 transitions. [2021-11-23 17:32:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 17:32:15,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:15,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:15,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:16,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:16,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (98)] Ended with exit code 0 [2021-11-23 17:32:16,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:16,456 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:32:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:16,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1363361296, now seen corresponding path program 1 times [2021-11-23 17:32:16,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:16,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892598986] [2021-11-23 17:32:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:16,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:16,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:16,458 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:16,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2021-11-23 17:32:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:16,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:32:16,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:32:16,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:32:17,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:17,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892598986] [2021-11-23 17:32:17,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892598986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:17,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1481462218] [2021-11-23 17:32:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:17,215 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:17,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:17,216 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:17,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2021-11-23 17:32:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:17,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:32:17,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 17:32:17,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:17,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1481462218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:17,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:32:17,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 8 [2021-11-23 17:32:17,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499114442] [2021-11-23 17:32:17,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:17,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:32:17,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:17,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:32:17,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:32:17,518 INFO L87 Difference]: Start difference. First operand 7325 states and 9437 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:20,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:20,171 INFO L93 Difference]: Finished difference Result 17377 states and 22291 transitions. [2021-11-23 17:32:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:32:20,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 105 [2021-11-23 17:32:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:20,182 INFO L225 Difference]: With dead ends: 17377 [2021-11-23 17:32:20,183 INFO L226 Difference]: Without dead ends: 10557 [2021-11-23 17:32:20,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 17:32:20,188 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 75 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:20,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 200 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:32:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10557 states. [2021-11-23 17:32:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10557 to 10441. [2021-11-23 17:32:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10441 states, 10440 states have (on average 1.242528735632184) internal successors, (12972), 10440 states have internal predecessors, (12972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10441 states to 10441 states and 12972 transitions. [2021-11-23 17:32:22,885 INFO L78 Accepts]: Start accepts. Automaton has 10441 states and 12972 transitions. Word has length 105 [2021-11-23 17:32:22,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:22,886 INFO L470 AbstractCegarLoop]: Abstraction has 10441 states and 12972 transitions. [2021-11-23 17:32:22,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 10441 states and 12972 transitions. [2021-11-23 17:32:22,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 17:32:22,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:22,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:22,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (101)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:23,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:23,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:23,288 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:32:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1969548674, now seen corresponding path program 1 times [2021-11-23 17:32:23,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:23,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258429770] [2021-11-23 17:32:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:23,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:23,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:23,289 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:23,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2021-11-23 17:32:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:23,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:32:23,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:25,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:26,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:26,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258429770] [2021-11-23 17:32:26,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258429770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:26,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [499275207] [2021-11-23 17:32:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:26,142 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:26,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:26,143 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:26,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2021-11-23 17:32:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:26,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:32:26,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:28,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:28,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [499275207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:28,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727144283] [2021-11-23 17:32:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:28,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:28,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:32:28,837 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:32:28,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-23 17:32:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:28,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:32:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:30,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:30,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727144283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:30,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:32:30,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 18, 15, 18, 15] total 44 [2021-11-23 17:32:30,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798672811] [2021-11-23 17:32:30,997 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:32:30,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 17:32:30,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:30,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 17:32:30,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 17:32:30,999 INFO L87 Difference]: Start difference. First operand 10441 states and 12972 transitions. Second operand has 44 states, 44 states have (on average 5.863636363636363) internal successors, (258), 44 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:35,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:35,386 INFO L93 Difference]: Finished difference Result 20869 states and 25942 transitions. [2021-11-23 17:32:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 17:32:35,387 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.863636363636363) internal successors, (258), 44 states have internal predecessors, (258), 0 states have call successors, (0), 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 105 [2021-11-23 17:32:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:35,403 INFO L225 Difference]: With dead ends: 20869 [2021-11-23 17:32:35,403 INFO L226 Difference]: Without dead ends: 13781 [2021-11-23 17:32:35,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=305, Invalid=1857, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 17:32:35,409 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 292 mSDsluCounter, 2804 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 2991 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:35,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 2991 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 433 Invalid, 0 Unknown, 171 Unchecked, 0.4s Time] [2021-11-23 17:32:35,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13781 states. [2021-11-23 17:32:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13781 to 10441. [2021-11-23 17:32:38,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10441 states, 10440 states have (on average 1.242432950191571) internal successors, (12971), 10440 states have internal predecessors, (12971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10441 states to 10441 states and 12971 transitions. [2021-11-23 17:32:38,156 INFO L78 Accepts]: Start accepts. Automaton has 10441 states and 12971 transitions. Word has length 105 [2021-11-23 17:32:38,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:38,157 INFO L470 AbstractCegarLoop]: Abstraction has 10441 states and 12971 transitions. [2021-11-23 17:32:38,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.863636363636363) internal successors, (258), 44 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:38,157 INFO L276 IsEmpty]: Start isEmpty. Operand 10441 states and 12971 transitions. [2021-11-23 17:32:38,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 17:32:38,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:38,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:38,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-11-23 17:32:38,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (103)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:38,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:38,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:38,759 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:32:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:38,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1572083510, now seen corresponding path program 1 times [2021-11-23 17:32:38,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:38,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719589268] [2021-11-23 17:32:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:38,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:38,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:38,761 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:38,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2021-11-23 17:32:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:38,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 17:32:38,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:45,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:46,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:46,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719589268] [2021-11-23 17:32:46,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719589268] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:46,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [549994094] [2021-11-23 17:32:46,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:46,922 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:46,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:46,923 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:46,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2021-11-23 17:32:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:47,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 17:32:47,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:55,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:58,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [549994094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:58,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345057321] [2021-11-23 17:32:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:58,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:58,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:32:58,440 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:32:58,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-23 17:32:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:58,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:32:58,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:02,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:03,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345057321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:03,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:33:03,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 27, 23, 16, 17] total 90 [2021-11-23 17:33:03,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332361979] [2021-11-23 17:33:03,179 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:33:03,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-23 17:33:03,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:33:03,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-23 17:33:03,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=817, Invalid=7193, Unknown=0, NotChecked=0, Total=8010 [2021-11-23 17:33:03,181 INFO L87 Difference]: Start difference. First operand 10441 states and 12971 transitions. Second operand has 90 states, 90 states have (on average 4.822222222222222) internal successors, (434), 90 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:33:12,870 INFO L93 Difference]: Finished difference Result 27326 states and 34053 transitions. [2021-11-23 17:33:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 17:33:12,871 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 4.822222222222222) internal successors, (434), 90 states have internal predecessors, (434), 0 states have call successors, (0), 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 105 [2021-11-23 17:33:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:33:12,896 INFO L225 Difference]: With dead ends: 27326 [2021-11-23 17:33:12,896 INFO L226 Difference]: Without dead ends: 20229 [2021-11-23 17:33:12,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 538 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4015 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1184, Invalid=9528, Unknown=0, NotChecked=0, Total=10712 [2021-11-23 17:33:12,904 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 679 mSDsluCounter, 6236 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 6429 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 933 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:33:12,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 6429 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1208 Invalid, 0 Unknown, 933 Unchecked, 1.4s Time] [2021-11-23 17:33:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20229 states. [2021-11-23 17:33:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20229 to 10396. [2021-11-23 17:33:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10396 states, 10395 states have (on average 1.2425204425204426) internal successors, (12916), 10395 states have internal predecessors, (12916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10396 states to 10396 states and 12916 transitions. [2021-11-23 17:33:15,689 INFO L78 Accepts]: Start accepts. Automaton has 10396 states and 12916 transitions. Word has length 105 [2021-11-23 17:33:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:33:15,689 INFO L470 AbstractCegarLoop]: Abstraction has 10396 states and 12916 transitions. [2021-11-23 17:33:15,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 4.822222222222222) internal successors, (434), 90 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 10396 states and 12916 transitions. [2021-11-23 17:33:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 17:33:15,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:33:15,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:33:15,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (106)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:15,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:16,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:16,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:33:16,292 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:33:16,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:33:16,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1276997140, now seen corresponding path program 1 times [2021-11-23 17:33:16,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:33:16,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593106822] [2021-11-23 17:33:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:16,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:33:16,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:33:16,294 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:33:16,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2021-11-23 17:33:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:16,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:33:16,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:17,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:17,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:33:17,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593106822] [2021-11-23 17:33:17,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593106822] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:17,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [239746090] [2021-11-23 17:33:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:17,713 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:33:17,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:33:17,714 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:33:17,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2021-11-23 17:33:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:17,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:33:17,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:20,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:21,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [239746090] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:21,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814935406] [2021-11-23 17:33:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:21,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:33:21,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:33:21,648 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:33:21,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-23 17:33:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:21,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 17:33:21,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:33,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:36,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814935406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:36,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:33:36,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 19, 16, 26, 21] total 88 [2021-11-23 17:33:36,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302584514] [2021-11-23 17:33:36,251 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:33:36,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-23 17:33:36,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:33:36,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-23 17:33:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1123, Invalid=6533, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 17:33:36,253 INFO L87 Difference]: Start difference. First operand 10396 states and 12916 transitions. Second operand has 88 states, 88 states have (on average 5.625) internal successors, (495), 88 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:33:45,130 INFO L93 Difference]: Finished difference Result 22823 states and 28123 transitions. [2021-11-23 17:33:45,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-23 17:33:45,131 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 5.625) internal successors, (495), 88 states have internal predecessors, (495), 0 states have call successors, (0), 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 105 [2021-11-23 17:33:45,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:33:45,150 INFO L225 Difference]: With dead ends: 22823 [2021-11-23 17:33:45,150 INFO L226 Difference]: Without dead ends: 15781 [2021-11-23 17:33:45,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 547 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4394 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=1730, Invalid=10260, Unknown=0, NotChecked=0, Total=11990 [2021-11-23 17:33:45,159 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 1001 mSDsluCounter, 6576 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 6816 SdHoareTripleChecker+Invalid, 3161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1449 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:33:45,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 6816 Invalid, 3161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1677 Invalid, 0 Unknown, 1449 Unchecked, 2.0s Time] [2021-11-23 17:33:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15781 states. [2021-11-23 17:33:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15781 to 10402. [2021-11-23 17:33:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10402 states, 10401 states have (on average 1.2424766849341409) internal successors, (12923), 10401 states have internal predecessors, (12923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10402 states to 10402 states and 12923 transitions. [2021-11-23 17:33:47,947 INFO L78 Accepts]: Start accepts. Automaton has 10402 states and 12923 transitions. Word has length 105 [2021-11-23 17:33:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:33:47,947 INFO L470 AbstractCegarLoop]: Abstraction has 10402 states and 12923 transitions. [2021-11-23 17:33:47,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 5.625) internal successors, (495), 88 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:47,947 INFO L276 IsEmpty]: Start isEmpty. Operand 10402 states and 12923 transitions. [2021-11-23 17:33:47,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 17:33:47,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:33:47,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:33:47,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (108)] Ended with exit code 0 [2021-11-23 17:33:48,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (109)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:48,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-11-23 17:33:48,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:33:48,550 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:33:48,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:33:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1612946930, now seen corresponding path program 1 times [2021-11-23 17:33:48,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:33:48,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577779901] [2021-11-23 17:33:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:48,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:33:48,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:33:48,556 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:33:48,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2021-11-23 17:33:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:48,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:33:48,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:53,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:55,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:33:55,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577779901] [2021-11-23 17:33:55,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577779901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:55,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1504822808] [2021-11-23 17:33:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:55,466 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:33:55,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:33:55,466 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:33:55,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (112)] Waiting until timeout for monitored process [2021-11-23 17:33:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:55,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:33:55,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:58,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:01,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1504822808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:01,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110369800] [2021-11-23 17:34:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:01,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:01,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:01,188 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:34:01,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-23 17:34:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:01,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:34:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:11,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:15,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110369800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:15,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:34:15,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17, 16, 23, 24] total 100 [2021-11-23 17:34:15,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491202767] [2021-11-23 17:34:15,696 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:34:15,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-23 17:34:15,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:15,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-23 17:34:15,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=9196, Unknown=0, NotChecked=0, Total=9900 [2021-11-23 17:34:15,698 INFO L87 Difference]: Start difference. First operand 10402 states and 12923 transitions. Second operand has 100 states, 100 states have (on average 5.35) internal successors, (535), 100 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:41,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:41,329 INFO L93 Difference]: Finished difference Result 39478 states and 48605 transitions. [2021-11-23 17:34:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-23 17:34:41,330 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 5.35) internal successors, (535), 100 states have internal predecessors, (535), 0 states have call successors, (0), 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 105 [2021-11-23 17:34:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:41,376 INFO L225 Difference]: With dead ends: 39478 [2021-11-23 17:34:41,377 INFO L226 Difference]: Without dead ends: 35018 [2021-11-23 17:34:41,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 538 SyntacticMatches, 9 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6501 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=1720, Invalid=19160, Unknown=0, NotChecked=0, Total=20880 [2021-11-23 17:34:41,385 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 1476 mSDsluCounter, 10968 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 11248 SdHoareTripleChecker+Invalid, 6172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3742 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:41,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 11248 Invalid, 6172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2389 Invalid, 0 Unknown, 3742 Unchecked, 2.8s Time] [2021-11-23 17:34:41,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35018 states. [2021-11-23 17:34:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35018 to 10407. [2021-11-23 17:34:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10407 states, 10406 states have (on average 1.2423601768210648) internal successors, (12928), 10406 states have internal predecessors, (12928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10407 states to 10407 states and 12928 transitions. [2021-11-23 17:34:44,466 INFO L78 Accepts]: Start accepts. Automaton has 10407 states and 12928 transitions. Word has length 105 [2021-11-23 17:34:44,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:44,466 INFO L470 AbstractCegarLoop]: Abstraction has 10407 states and 12928 transitions. [2021-11-23 17:34:44,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 5.35) internal successors, (535), 100 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 10407 states and 12928 transitions. [2021-11-23 17:34:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 17:34:44,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:44,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:34:44,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (112)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:44,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (111)] Ended with exit code 0 [2021-11-23 17:34:44,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-11-23 17:34:45,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:45,070 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:34:45,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:45,070 INFO L85 PathProgramCache]: Analyzing trace with hash 840645789, now seen corresponding path program 1 times [2021-11-23 17:34:45,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:45,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716747189] [2021-11-23 17:34:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:45,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:45,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:45,072 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:45,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2021-11-23 17:34:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:45,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 17:34:45,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:48,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:50,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:34:50,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716747189] [2021-11-23 17:34:50,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716747189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:50,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [751992187] [2021-11-23 17:34:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:50,195 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:34:50,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:34:50,195 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:34:50,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2021-11-23 17:34:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:50,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:34:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:55,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:56,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [751992187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:56,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41555098] [2021-11-23 17:34:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:56,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:56,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:56,328 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:34:56,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-23 17:34:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:56,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 17:34:56,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:13,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:18,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41555098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:18,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:18,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 18, 17, 27, 26] total 86 [2021-11-23 17:35:18,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898969169] [2021-11-23 17:35:18,853 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:18,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-23 17:35:18,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:18,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-23 17:35:18,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=6515, Unknown=0, NotChecked=0, Total=7310 [2021-11-23 17:35:18,854 INFO L87 Difference]: Start difference. First operand 10407 states and 12928 transitions. Second operand has 86 states, 86 states have (on average 4.8604651162790695) internal successors, (418), 86 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:32,563 INFO L93 Difference]: Finished difference Result 29016 states and 36229 transitions. [2021-11-23 17:35:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-23 17:35:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 4.8604651162790695) internal successors, (418), 86 states have internal predecessors, (418), 0 states have call successors, (0), 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 106 [2021-11-23 17:35:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:32,587 INFO L225 Difference]: With dead ends: 29016 [2021-11-23 17:35:32,588 INFO L226 Difference]: Without dead ends: 19069 [2021-11-23 17:35:32,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 533 SyntacticMatches, 18 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4700 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=1234, Invalid=10322, Unknown=0, NotChecked=0, Total=11556 [2021-11-23 17:35:32,599 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 1693 mSDsluCounter, 7023 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 7307 SdHoareTripleChecker+Invalid, 3818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1905 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:32,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1693 Valid, 7307 Invalid, 3818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1834 Invalid, 0 Unknown, 1905 Unchecked, 2.1s Time] [2021-11-23 17:35:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19069 states. [2021-11-23 17:35:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19069 to 16459. [2021-11-23 17:35:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16459 states, 16458 states have (on average 1.2407339895491554) internal successors, (20420), 16458 states have internal predecessors, (20420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:37,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16459 states to 16459 states and 20420 transitions. [2021-11-23 17:35:37,216 INFO L78 Accepts]: Start accepts. Automaton has 16459 states and 20420 transitions. Word has length 106 [2021-11-23 17:35:37,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:37,217 INFO L470 AbstractCegarLoop]: Abstraction has 16459 states and 20420 transitions. [2021-11-23 17:35:37,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 4.8604651162790695) internal successors, (418), 86 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:37,217 INFO L276 IsEmpty]: Start isEmpty. Operand 16459 states and 20420 transitions. [2021-11-23 17:35:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 17:35:37,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:37,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:37,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (115)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:37,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (114)] Ended with exit code 0 [2021-11-23 17:35:37,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:37,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:37,821 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:35:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:37,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1595649081, now seen corresponding path program 1 times [2021-11-23 17:35:37,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:37,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745664688] [2021-11-23 17:35:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:37,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:37,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:37,825 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:37,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2021-11-23 17:35:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:37,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:35:37,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:38,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:39,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:35:39,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745664688] [2021-11-23 17:35:39,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745664688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:39,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [744390428] [2021-11-23 17:35:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:39,353 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:39,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:35:39,355 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:35:39,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (118)] Waiting until timeout for monitored process [2021-11-23 17:35:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:39,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:35:39,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:42,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:43,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [744390428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:43,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221783847] [2021-11-23 17:35:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:43,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:35:43,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:43,385 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:35:43,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-11-23 17:35:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:43,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:35:43,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:35:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:45,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:35:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:35:46,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221783847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:35:46,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:35:46,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 19, 16, 16, 15] total 65 [2021-11-23 17:35:46,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948963496] [2021-11-23 17:35:46,956 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:35:46,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-23 17:35:46,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:35:46,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-23 17:35:46,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=3649, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 17:35:46,959 INFO L87 Difference]: Start difference. First operand 16459 states and 20420 transitions. Second operand has 65 states, 65 states have (on average 7.338461538461538) internal successors, (477), 65 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:35:52,718 INFO L93 Difference]: Finished difference Result 28146 states and 35004 transitions. [2021-11-23 17:35:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 17:35:52,719 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 7.338461538461538) internal successors, (477), 65 states have internal predecessors, (477), 0 states have call successors, (0), 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 106 [2021-11-23 17:35:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:35:52,739 INFO L225 Difference]: With dead ends: 28146 [2021-11-23 17:35:52,739 INFO L226 Difference]: Without dead ends: 16539 [2021-11-23 17:35:52,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 575 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2056 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=723, Invalid=4977, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 17:35:52,748 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 713 mSDsluCounter, 4802 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 4984 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1142 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:35:52,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 4984 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 386 Invalid, 0 Unknown, 1142 Unchecked, 0.4s Time] [2021-11-23 17:35:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16539 states. [2021-11-23 17:35:57,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16539 to 16449. [2021-11-23 17:35:57,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16449 states, 16448 states have (on average 1.2406371595330739) internal successors, (20406), 16448 states have internal predecessors, (20406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16449 states to 16449 states and 20406 transitions. [2021-11-23 17:35:57,669 INFO L78 Accepts]: Start accepts. Automaton has 16449 states and 20406 transitions. Word has length 106 [2021-11-23 17:35:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:35:57,670 INFO L470 AbstractCegarLoop]: Abstraction has 16449 states and 20406 transitions. [2021-11-23 17:35:57,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 7.338461538461538) internal successors, (477), 65 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:35:57,670 INFO L276 IsEmpty]: Start isEmpty. Operand 16449 states and 20406 transitions. [2021-11-23 17:35:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 17:35:57,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:35:57,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:35:57,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-11-23 17:35:57,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (117)] Ended with exit code 0 [2021-11-23 17:35:58,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (118)] Ended with exit code 0 [2021-11-23 17:35:58,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:58,273 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:35:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:35:58,273 INFO L85 PathProgramCache]: Analyzing trace with hash -190625855, now seen corresponding path program 1 times [2021-11-23 17:35:58,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:35:58,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135416522] [2021-11-23 17:35:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:35:58,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:35:58,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:35:58,275 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:35:58,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2021-11-23 17:35:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:35:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:35:58,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:03,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:05,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:05,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135416522] [2021-11-23 17:36:05,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135416522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:05,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1853788807] [2021-11-23 17:36:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:05,538 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:05,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:36:05,539 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:36:05,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (121)] Waiting until timeout for monitored process [2021-11-23 17:36:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:05,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:36:05,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:09,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:11,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1853788807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:11,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452270189] [2021-11-23 17:36:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:11,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:36:11,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:11,311 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:36:11,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-11-23 17:36:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:11,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:36:11,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:14,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:14,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452270189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:14,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:36:14,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17, 16, 16, 16] total 74 [2021-11-23 17:36:14,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225026847] [2021-11-23 17:36:14,959 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:36:14,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-23 17:36:14,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:14,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-23 17:36:14,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=5057, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 17:36:14,960 INFO L87 Difference]: Start difference. First operand 16449 states and 20406 transitions. Second operand has 74 states, 74 states have (on average 6.216216216216216) internal successors, (460), 74 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:36:43,808 INFO L93 Difference]: Finished difference Result 62920 states and 77544 transitions. [2021-11-23 17:36:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-23 17:36:43,809 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 6.216216216216216) internal successors, (460), 74 states have internal predecessors, (460), 0 states have call successors, (0), 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 106 [2021-11-23 17:36:43,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:36:43,897 INFO L225 Difference]: With dead ends: 62920 [2021-11-23 17:36:43,897 INFO L226 Difference]: Without dead ends: 55255 [2021-11-23 17:36:43,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 570 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4646 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1075, Invalid=14177, Unknown=0, NotChecked=0, Total=15252 [2021-11-23 17:36:43,911 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 1038 mSDsluCounter, 13756 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 14135 SdHoareTripleChecker+Invalid, 4073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2794 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:36:43,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 14135 Invalid, 4073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1254 Invalid, 0 Unknown, 2794 Unchecked, 1.3s Time] [2021-11-23 17:36:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55255 states. [2021-11-23 17:36:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55255 to 16403. [2021-11-23 17:36:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16403 states, 16402 states have (on average 1.2408852578953786) internal successors, (20353), 16402 states have internal predecessors, (20353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16403 states to 16403 states and 20353 transitions. [2021-11-23 17:36:49,760 INFO L78 Accepts]: Start accepts. Automaton has 16403 states and 20353 transitions. Word has length 106 [2021-11-23 17:36:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:36:49,761 INFO L470 AbstractCegarLoop]: Abstraction has 16403 states and 20353 transitions. [2021-11-23 17:36:49,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 6.216216216216216) internal successors, (460), 74 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:36:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 16403 states and 20353 transitions. [2021-11-23 17:36:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 17:36:49,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:49,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:36:49,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:49,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-11-23 17:36:50,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (121)] Forceful destruction successful, exit code 0 [2021-11-23 17:36:50,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:50,368 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:36:50,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1318675638, now seen corresponding path program 1 times [2021-11-23 17:36:50,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:50,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867007975] [2021-11-23 17:36:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:50,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:50,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:50,370 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:50,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2021-11-23 17:36:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:50,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:36:50,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:51,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:36:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:52,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867007975] [2021-11-23 17:36:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867007975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:36:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1197372268] [2021-11-23 17:36:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:52,009 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:36:52,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:36:52,010 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:36:52,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (124)] Waiting until timeout for monitored process [2021-11-23 17:36:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:52,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 17:36:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:36:58,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:00,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1197372268] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:00,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513595719] [2021-11-23 17:37:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:00,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:00,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:00,282 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:37:00,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-11-23 17:37:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:00,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:37:00,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:01,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:37:01,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513595719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:01,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:37:01,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 26, 18, 11, 10] total 63 [2021-11-23 17:37:01,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958405902] [2021-11-23 17:37:01,751 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:37:01,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-23 17:37:01,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:01,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-23 17:37:01,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=3369, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 17:37:01,753 INFO L87 Difference]: Start difference. First operand 16403 states and 20353 transitions. Second operand has 63 states, 63 states have (on average 6.222222222222222) internal successors, (392), 63 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:14,645 INFO L93 Difference]: Finished difference Result 42367 states and 52769 transitions. [2021-11-23 17:37:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 17:37:14,646 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 6.222222222222222) internal successors, (392), 63 states have internal predecessors, (392), 0 states have call successors, (0), 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 107 [2021-11-23 17:37:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:14,688 INFO L225 Difference]: With dead ends: 42367 [2021-11-23 17:37:14,688 INFO L226 Difference]: Without dead ends: 30753 [2021-11-23 17:37:14,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=735, Invalid=4965, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 17:37:14,698 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 540 mSDsluCounter, 5850 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 6140 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:14,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 6140 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1298 Invalid, 0 Unknown, 410 Unchecked, 1.5s Time] [2021-11-23 17:37:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30753 states. [2021-11-23 17:37:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30753 to 16386. [2021-11-23 17:37:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16386 states, 16385 states have (on average 1.240891058895331) internal successors, (20332), 16385 states have internal predecessors, (20332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16386 states to 16386 states and 20332 transitions. [2021-11-23 17:37:20,200 INFO L78 Accepts]: Start accepts. Automaton has 16386 states and 20332 transitions. Word has length 107 [2021-11-23 17:37:20,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:20,201 INFO L470 AbstractCegarLoop]: Abstraction has 16386 states and 20332 transitions. [2021-11-23 17:37:20,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 6.222222222222222) internal successors, (392), 63 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:20,201 INFO L276 IsEmpty]: Start isEmpty. Operand 16386 states and 20332 transitions. [2021-11-23 17:37:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 17:37:20,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:20,203 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:20,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:20,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (123)] Ended with exit code 0 [2021-11-23 17:37:20,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (124)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:20,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:20,804 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:37:20,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:20,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1956495971, now seen corresponding path program 1 times [2021-11-23 17:37:20,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:20,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884922361] [2021-11-23 17:37:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:20,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:20,805 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:20,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2021-11-23 17:37:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:20,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:37:20,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:37:21,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:37:21,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:21,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884922361] [2021-11-23 17:37:21,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884922361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:37:21,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:37:21,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:37:21,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953250963] [2021-11-23 17:37:21,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:37:21,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:37:21,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:21,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:37:21,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:37:21,106 INFO L87 Difference]: Start difference. First operand 16386 states and 20332 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:37:23,244 INFO L93 Difference]: Finished difference Result 23264 states and 28842 transitions. [2021-11-23 17:37:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:37:23,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-23 17:37:23,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:37:23,253 INFO L225 Difference]: With dead ends: 23264 [2021-11-23 17:37:23,253 INFO L226 Difference]: Without dead ends: 7259 [2021-11-23 17:37:23,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:37:23,265 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 49 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:37:23,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 197 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:37:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7259 states. [2021-11-23 17:37:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7259 to 6171. [2021-11-23 17:37:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6171 states, 6170 states have (on average 1.1957860615883307) internal successors, (7378), 6170 states have internal predecessors, (7378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6171 states to 6171 states and 7378 transitions. [2021-11-23 17:37:25,492 INFO L78 Accepts]: Start accepts. Automaton has 6171 states and 7378 transitions. Word has length 127 [2021-11-23 17:37:25,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:37:25,492 INFO L470 AbstractCegarLoop]: Abstraction has 6171 states and 7378 transitions. [2021-11-23 17:37:25,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:37:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6171 states and 7378 transitions. [2021-11-23 17:37:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-23 17:37:25,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:37:25,495 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:37:25,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2021-11-23 17:37:25,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:37:25,696 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-23 17:37:25,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:37:25,697 INFO L85 PathProgramCache]: Analyzing trace with hash 489836099, now seen corresponding path program 1 times [2021-11-23 17:37:25,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:37:25,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580843105] [2021-11-23 17:37:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:25,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:37:25,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:37:25,699 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:37:25,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2021-11-23 17:37:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:25,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:37:25,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:37:27,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:37:27,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:37:27,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580843105] [2021-11-23 17:37:27,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580843105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:27,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1511395422] [2021-11-23 17:37:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:27,722 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:37:27,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:37:27,723 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:37:27,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (128)] Waiting until timeout for monitored process [2021-11-23 17:37:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:27,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:37:27,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:37:29,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 17:37:29,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1511395422] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:29,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446010593] [2021-11-23 17:37:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:37:29,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:37:29,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:29,975 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:37:29,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c22353b4-15e4-4189-ae9c-b8cc07718bd5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-11-23 17:37:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:37:30,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:37:30,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:37:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:37:30,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:37:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 17:37:31,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446010593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:37:31,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:37:31,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 4, 4] total 21 [2021-11-23 17:37:31,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771219549] [2021-11-23 17:37:31,716 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:37:31,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 17:37:31,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:37:31,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 17:37:31,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:37:31,717 INFO L87 Difference]: Start difference. First operand 6171 states and 7378 transitions. Second operand has 22 states, 22 states have (on average 19.727272727272727) internal successors, (434), 21 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)