./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash 3f53cdfefb3b8deaa85e478a46d174641ebfd83c5eabb855b34643b8ebf35e98 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:51:53,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:51:53,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:51:53,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:51:53,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:51:53,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:51:53,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:51:53,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:51:53,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:51:53,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:51:53,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:51:53,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:51:53,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:51:53,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:51:53,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:51:53,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:51:53,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:51:53,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:51:53,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:51:53,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:51:53,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:51:53,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:51:53,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:51:53,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:51:53,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:51:53,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:51:53,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:51:53,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:51:53,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:51:53,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:51:53,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:51:53,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:51:53,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:51:53,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:51:53,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:51:53,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:51:53,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:51:53,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:51:53,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:51:53,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:51:53,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:51:53,590 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:51:53,642 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:51:53,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:51:53,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:51:53,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:51:53,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:51:53,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:51:53,647 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:51:53,647 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:51:53,647 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:51:53,648 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:51:53,649 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:51:53,649 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:51:53,650 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:51:53,650 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:51:53,650 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:51:53,651 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:51:53,651 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:51:53,651 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:51:53,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:51:53,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:51:53,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:51:53,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:51:53,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:51:53,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:51:53,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:51:53,664 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:51:53,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:51:53,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:51:53,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:51:53,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:51:53,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:51:53,666 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:51:53,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:51:53,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:51:53,667 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:51:53,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:51:53,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:51:53,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:51:53,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f53cdfefb3b8deaa85e478a46d174641ebfd83c5eabb855b34643b8ebf35e98 [2022-11-03 01:51:54,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:51:54,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:51:54,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:51:54,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:51:54,042 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:51:54,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c [2022-11-03 01:51:54,135 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/data/20339202e/03faa8db644747d1825b9cab36158906/FLAGe3cb7a2b5 [2022-11-03 01:51:54,895 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:51:54,896 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c [2022-11-03 01:51:54,908 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/data/20339202e/03faa8db644747d1825b9cab36158906/FLAGe3cb7a2b5 [2022-11-03 01:51:55,158 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/data/20339202e/03faa8db644747d1825b9cab36158906 [2022-11-03 01:51:55,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:51:55,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:51:55,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:51:55,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:51:55,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:51:55,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:55,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ddb6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55, skipping insertion in model container [2022-11-03 01:51:55,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:55,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:51:55,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:51:55,496 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_edd74750-0e3b-49f5-beb2-3cfee3791c29/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c[1107,1120] [2022-11-03 01:51:55,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:51:55,635 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:51:55,660 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_edd74750-0e3b-49f5-beb2-3cfee3791c29/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c[1107,1120] [2022-11-03 01:51:55,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:51:55,821 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:51:55,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55 WrapperNode [2022-11-03 01:51:55,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:51:55,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:51:55,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:51:55,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:51:55,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:55,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:55,958 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 548 [2022-11-03 01:51:55,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:51:55,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:51:55,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:51:55,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:51:55,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:55,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:55,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:55,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:56,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:56,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:56,041 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:56,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:56,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:51:56,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:51:56,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:51:56,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:51:56,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55" (1/1) ... [2022-11-03 01:51:56,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:51:56,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:56,120 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:51:56,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:51:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:51:56,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:51:56,440 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:51:56,442 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:51:57,420 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:51:58,074 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:51:58,075 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:51:58,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:51:58 BoogieIcfgContainer [2022-11-03 01:51:58,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:51:58,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:51:58,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:51:58,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:51:58,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:51:55" (1/3) ... [2022-11-03 01:51:58,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a187dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:51:58, skipping insertion in model container [2022-11-03 01:51:58,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:55" (2/3) ... [2022-11-03 01:51:58,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a187dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:51:58, skipping insertion in model container [2022-11-03 01:51:58,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:51:58" (3/3) ... [2022-11-03 01:51:58,089 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c [2022-11-03 01:51:58,112 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:51:58,113 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:51:58,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:51:58,179 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@68940d9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:51:58,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:51:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:51:58,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:58,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:51:58,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:58,200 INFO L85 PathProgramCache]: Analyzing trace with hash 9304820, now seen corresponding path program 1 times [2022-11-03 01:51:58,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:58,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314131443] [2022-11-03 01:51:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:51:58,536 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:51:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:51:58,757 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:51:58,760 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:51:58,761 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:51:58,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:51:58,770 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:51:58,775 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:51:58,800 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 01:51:58,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:51:58 BoogieIcfgContainer [2022-11-03 01:51:58,811 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:51:58,812 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:51:58,812 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:51:58,812 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:51:58,813 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:51:58" (3/4) ... [2022-11-03 01:51:58,817 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:51:58,817 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:51:58,819 INFO L158 Benchmark]: Toolchain (without parser) took 3644.88ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 60.7MB in the beginning and 42.4MB in the end (delta: 18.4MB). Peak memory consumption was 38.6MB. Max. memory is 16.1GB. [2022-11-03 01:51:58,820 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 102.8MB. Free memory is still 77.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:51:58,821 INFO L158 Benchmark]: CACSL2BoogieTranslator took 646.52ms. Allocated memory is still 102.8MB. Free memory was 60.5MB in the beginning and 71.4MB in the end (delta: -11.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 01:51:58,822 INFO L158 Benchmark]: Boogie Procedure Inliner took 134.97ms. Allocated memory is still 102.8MB. Free memory was 71.4MB in the beginning and 65.5MB in the end (delta: 5.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 01:51:58,822 INFO L158 Benchmark]: Boogie Preprocessor took 92.87ms. Allocated memory is still 102.8MB. Free memory was 65.5MB in the beginning and 62.2MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:51:58,840 INFO L158 Benchmark]: RCFGBuilder took 2025.36ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 62.2MB in the beginning and 76.2MB in the end (delta: -14.1MB). Peak memory consumption was 45.2MB. Max. memory is 16.1GB. [2022-11-03 01:51:58,841 INFO L158 Benchmark]: TraceAbstraction took 730.35ms. Allocated memory is still 123.7MB. Free memory was 76.2MB in the beginning and 42.7MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2022-11-03 01:51:58,842 INFO L158 Benchmark]: Witness Printer took 5.71ms. Allocated memory is still 123.7MB. Free memory was 42.7MB in the beginning and 42.4MB in the end (delta: 312.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:51:58,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 102.8MB. Free memory is still 77.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 646.52ms. Allocated memory is still 102.8MB. Free memory was 60.5MB in the beginning and 71.4MB in the end (delta: -11.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 134.97ms. Allocated memory is still 102.8MB. Free memory was 71.4MB in the beginning and 65.5MB in the end (delta: 5.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 92.87ms. Allocated memory is still 102.8MB. Free memory was 65.5MB in the beginning and 62.2MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2025.36ms. Allocated memory was 102.8MB in the beginning and 123.7MB in the end (delta: 21.0MB). Free memory was 62.2MB in the beginning and 76.2MB in the end (delta: -14.1MB). Peak memory consumption was 45.2MB. Max. memory is 16.1GB. * TraceAbstraction took 730.35ms. Allocated memory is still 123.7MB. Free memory was 76.2MB in the beginning and 42.7MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Witness Printer took 5.71ms. Allocated memory is still 123.7MB. Free memory was 42.7MB in the beginning and 42.4MB in the end (delta: 312.4kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 152, overapproximation of bitwiseOr at line 161, overapproximation of bitwiseAnd at line 146. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 8); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (8 - 1); [L31] const SORT_10 mask_SORT_10 = (SORT_10)-1 >> (sizeof(SORT_10) * 8 - 32); [L32] const SORT_10 msb_SORT_10 = (SORT_10)1 << (32 - 1); [L34] const SORT_32 mask_SORT_32 = (SORT_32)-1 >> (sizeof(SORT_32) * 8 - 4); [L35] const SORT_32 msb_SORT_32 = (SORT_32)1 << (4 - 1); [L37] const SORT_70 mask_SORT_70 = (SORT_70)-1 >> (sizeof(SORT_70) * 8 - 10); [L38] const SORT_70 msb_SORT_70 = (SORT_70)1 << (10 - 1); [L40] const SORT_1 var_7 = 0; [L41] const SORT_10 var_12 = 0; [L42] const SORT_1 var_22 = 1; [L43] const SORT_70 var_71 = 0; [L44] const SORT_10 var_95 = 104; [L45] const SORT_10 var_143 = 1; [L47] SORT_1 input_2; [L48] SORT_3 input_4; [L49] SORT_1 input_5; [L50] SORT_1 input_6; [L51] SORT_1 input_30; [L52] SORT_32 input_33; [L53] SORT_1 input_35; [L54] SORT_32 input_37; [L55] SORT_1 input_39; [L56] SORT_1 input_41; [L57] SORT_1 input_47; [L58] SORT_1 input_49; [L59] SORT_1 input_51; [L60] SORT_3 input_55; [L61] SORT_1 input_58; [L62] SORT_1 input_66; [L63] SORT_1 input_75; [L64] SORT_1 input_77; [L65] SORT_1 input_89; [L66] SORT_1 input_90; [L67] SORT_1 input_91; [L68] SORT_1 input_105; [L69] SORT_1 input_111; [L70] SORT_1 input_117; [L71] SORT_1 input_123; [L72] SORT_1 input_124; [L73] SORT_1 input_125; [L74] SORT_70 input_141; [L76] SORT_1 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L77] SORT_1 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L78] SORT_1 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] SORT_1 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_60 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] SORT_1 state_62 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_64 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L86] SORT_1 state_68 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_70 state_72 = __VERIFIER_nondet_ushort() & mask_SORT_70; [L89] SORT_1 init_9_arg_1 = var_7; [L90] state_8 = init_9_arg_1 [L91] SORT_1 init_16_arg_1 = var_7; [L92] state_15 = init_16_arg_1 [L93] SORT_1 init_27_arg_1 = var_7; [L94] state_26 = init_27_arg_1 [L95] SORT_1 init_29_arg_1 = var_7; [L96] state_28 = init_29_arg_1 [L97] SORT_1 init_44_arg_1 = var_7; [L98] state_43 = init_44_arg_1 [L99] SORT_1 init_46_arg_1 = var_7; [L100] state_45 = init_46_arg_1 [L101] SORT_1 init_54_arg_1 = var_22; [L102] state_53 = init_54_arg_1 [L103] SORT_1 init_61_arg_1 = var_7; [L104] state_60 = init_61_arg_1 [L105] SORT_1 init_63_arg_1 = var_7; [L106] state_62 = init_63_arg_1 [L107] SORT_1 init_65_arg_1 = var_7; [L108] state_64 = init_65_arg_1 [L109] SORT_1 init_69_arg_1 = var_7; [L110] state_68 = init_69_arg_1 [L111] SORT_70 init_73_arg_1 = var_71; [L112] state_72 = init_73_arg_1 VAL [init_16_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_54_arg_1=1, init_61_arg_1=0, init_63_arg_1=0, init_65_arg_1=0, init_69_arg_1=0, init_73_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_10=4294967295, mask_SORT_3=255, mask_SORT_32=15, mask_SORT_70=1023, msb_SORT_1=1, msb_SORT_10=2147483648, msb_SORT_3=128, msb_SORT_32=8, msb_SORT_70=512, state_15=0, state_26=0, state_28=0, state_43=0, state_45=0, state_53=1, state_60=0, state_62=0, state_64=0, state_68=0, state_72=0, state_8=0, var_12=0, var_143=1, var_22=1, var_7=0, var_71=0, var_95=104] [L115] input_2 = __VERIFIER_nondet_uchar() [L116] input_4 = __VERIFIER_nondet_uchar() [L117] input_5 = __VERIFIER_nondet_uchar() [L118] input_6 = __VERIFIER_nondet_uchar() [L119] input_30 = __VERIFIER_nondet_uchar() [L120] input_33 = __VERIFIER_nondet_uchar() [L121] input_35 = __VERIFIER_nondet_uchar() [L122] input_37 = __VERIFIER_nondet_uchar() [L123] input_39 = __VERIFIER_nondet_uchar() [L124] input_41 = __VERIFIER_nondet_uchar() [L125] input_47 = __VERIFIER_nondet_uchar() [L126] input_49 = __VERIFIER_nondet_uchar() [L127] input_51 = __VERIFIER_nondet_uchar() [L128] input_55 = __VERIFIER_nondet_uchar() [L129] input_58 = __VERIFIER_nondet_uchar() [L130] input_66 = __VERIFIER_nondet_uchar() [L131] input_75 = __VERIFIER_nondet_uchar() [L132] input_77 = __VERIFIER_nondet_uchar() [L133] input_89 = __VERIFIER_nondet_uchar() [L134] input_90 = __VERIFIER_nondet_uchar() [L135] input_91 = __VERIFIER_nondet_uchar() [L136] input_105 = __VERIFIER_nondet_uchar() [L137] input_111 = __VERIFIER_nondet_uchar() [L138] input_117 = __VERIFIER_nondet_uchar() [L139] input_123 = __VERIFIER_nondet_uchar() [L140] input_124 = __VERIFIER_nondet_uchar() [L141] input_125 = __VERIFIER_nondet_uchar() [L142] input_141 = __VERIFIER_nondet_ushort() [L145] SORT_1 var_11_arg_0 = state_8; [L146] var_11_arg_0 = var_11_arg_0 & mask_SORT_1 [L147] SORT_10 var_11 = var_11_arg_0; [L148] SORT_10 var_13_arg_0 = var_11; [L149] SORT_10 var_13_arg_1 = var_12; [L150] SORT_1 var_13 = var_13_arg_0 == var_13_arg_1; [L151] SORT_1 var_14_arg_0 = var_13; [L152] SORT_1 var_14 = ~var_14_arg_0; [L153] SORT_1 var_17_arg_0 = state_15; [L154] var_17_arg_0 = var_17_arg_0 & mask_SORT_1 [L155] SORT_10 var_17 = var_17_arg_0; [L156] SORT_10 var_18_arg_0 = var_17; [L157] SORT_10 var_18_arg_1 = var_12; [L158] SORT_1 var_18 = var_18_arg_0 == var_18_arg_1; [L159] SORT_1 var_19_arg_0 = var_14; [L160] SORT_1 var_19_arg_1 = var_18; [L161] SORT_1 var_19 = var_19_arg_0 | var_19_arg_1; [L162] SORT_1 var_23_arg_0 = var_19; [L163] SORT_1 var_23 = ~var_23_arg_0; [L164] SORT_1 var_24_arg_0 = var_22; [L165] SORT_1 var_24_arg_1 = var_23; [L166] SORT_1 var_24 = var_24_arg_0 & var_24_arg_1; [L167] var_24 = var_24 & mask_SORT_1 [L168] SORT_1 bad_25_arg_0 = var_24; [L169] CALL __VERIFIER_assert(!(bad_25_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 01:51:58,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash 3f53cdfefb3b8deaa85e478a46d174641ebfd83c5eabb855b34643b8ebf35e98 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:52:01,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:52:01,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:52:01,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:52:01,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:52:01,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:52:01,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:52:01,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:52:01,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:52:01,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:52:01,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:52:01,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:52:01,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:52:01,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:52:01,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:52:01,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:52:01,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:52:01,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:52:01,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:52:01,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:52:01,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:52:01,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:52:01,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:52:01,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:52:01,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:52:01,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:52:01,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:52:01,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:52:01,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:52:01,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:52:01,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:52:01,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:52:01,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:52:01,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:52:01,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:52:01,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:52:01,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:52:01,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:52:01,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:52:01,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:52:01,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:52:01,922 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:52:01,981 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:52:01,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:52:01,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:52:01,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:52:01,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:52:01,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:52:01,985 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:52:01,985 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:52:01,985 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:52:01,986 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:52:01,987 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:52:01,987 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:52:01,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:52:01,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:52:01,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:52:01,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:52:01,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:52:01,990 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:52:01,990 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:52:01,991 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:52:01,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:52:01,991 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:52:01,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:52:01,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:52:01,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:52:01,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:52:01,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:52:01,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:52:01,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:52:01,993 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:52:01,993 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:52:01,993 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:01,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:52:01,994 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:52:01,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:52:01,994 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_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f53cdfefb3b8deaa85e478a46d174641ebfd83c5eabb855b34643b8ebf35e98 [2022-11-03 01:52:02,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:52:02,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:52:02,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:52:02,547 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:52:02,548 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:52:02,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c [2022-11-03 01:52:02,642 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/data/f83b8cdbb/0ef046ae7a35407eadefe3cf3167c53c/FLAG0e678e59f [2022-11-03 01:52:03,187 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:52:03,188 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c [2022-11-03 01:52:03,207 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/data/f83b8cdbb/0ef046ae7a35407eadefe3cf3167c53c/FLAG0e678e59f [2022-11-03 01:52:03,524 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/data/f83b8cdbb/0ef046ae7a35407eadefe3cf3167c53c [2022-11-03 01:52:03,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:52:03,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:52:03,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:52:03,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:52:03,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:52:03,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:52:03" (1/1) ... [2022-11-03 01:52:03,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798eb270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:03, skipping insertion in model container [2022-11-03 01:52:03,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:52:03" (1/1) ... [2022-11-03 01:52:03,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:52:03,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:52:03,748 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_edd74750-0e3b-49f5-beb2-3cfee3791c29/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c[1107,1120] [2022-11-03 01:52:03,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:52:03,877 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:52:03,925 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_edd74750-0e3b-49f5-beb2-3cfee3791c29/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c[1107,1120] [2022-11-03 01:52:04,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:52:04,047 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:52:04,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04 WrapperNode [2022-11-03 01:52:04,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:52:04,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:52:04,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:52:04,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:52:04,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04" (1/1) ... [2022-11-03 01:52:04,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04" (1/1) ... [2022-11-03 01:52:04,188 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 548 [2022-11-03 01:52:04,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:52:04,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:52:04,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:52:04,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:52:04,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04" (1/1) ... [2022-11-03 01:52:04,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04" (1/1) ... [2022-11-03 01:52:04,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04" (1/1) ... [2022-11-03 01:52:04,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04" (1/1) ... [2022-11-03 01:52:04,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04" (1/1) ... [2022-11-03 01:52:04,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04" (1/1) ... [2022-11-03 01:52:04,280 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04" (1/1) ... [2022-11-03 01:52:04,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04" (1/1) ... [2022-11-03 01:52:04,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:52:04,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:52:04,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:52:04,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:52:04,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04" (1/1) ... [2022-11-03 01:52:04,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:52:04,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:04,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:52:04,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:52:04,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:52:04,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:52:04,592 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:52:04,594 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:52:05,363 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:52:05,373 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:52:05,374 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:52:05,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:52:05 BoogieIcfgContainer [2022-11-03 01:52:05,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:52:05,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:52:05,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:52:05,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:52:05,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:52:03" (1/3) ... [2022-11-03 01:52:05,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b09f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:52:05, skipping insertion in model container [2022-11-03 01:52:05,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:52:04" (2/3) ... [2022-11-03 01:52:05,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b09f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:52:05, skipping insertion in model container [2022-11-03 01:52:05,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:52:05" (3/3) ... [2022-11-03 01:52:05,387 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p14.c [2022-11-03 01:52:05,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:52:05,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:52:05,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:52:05,481 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a8a24f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:52:05,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:52:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:05,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 01:52:05,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:05,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 01:52:05,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:05,515 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 01:52:05,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:05,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327617336] [2022-11-03 01:52:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:05,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:05,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:05,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:05,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:52:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:05,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 01:52:05,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:06,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:06,048 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:06,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327617336] [2022-11-03 01:52:06,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327617336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:06,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:06,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:06,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289744467] [2022-11-03 01:52:06,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:06,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:06,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:06,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:06,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:06,101 INFO L87 Difference]: Start difference. First operand has 83 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:06,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:06,276 INFO L93 Difference]: Finished difference Result 236 states and 354 transitions. [2022-11-03 01:52:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:06,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-03 01:52:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:06,290 INFO L225 Difference]: With dead ends: 236 [2022-11-03 01:52:06,291 INFO L226 Difference]: Without dead ends: 155 [2022-11-03 01:52:06,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:06,298 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 220 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:06,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 312 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-03 01:52:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 81. [2022-11-03 01:52:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 117 transitions. [2022-11-03 01:52:06,346 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 117 transitions. Word has length 5 [2022-11-03 01:52:06,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:06,347 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 117 transitions. [2022-11-03 01:52:06,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 117 transitions. [2022-11-03 01:52:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:06,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:06,351 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:06,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:06,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:06,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:06,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1926009885, now seen corresponding path program 1 times [2022-11-03 01:52:06,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:06,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373782923] [2022-11-03 01:52:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:06,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:06,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:06,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:06,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:52:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:06,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:06,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:06,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:06,978 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:06,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373782923] [2022-11-03 01:52:06,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373782923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:06,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:06,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:06,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293922631] [2022-11-03 01:52:06,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:06,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:06,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:06,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:06,983 INFO L87 Difference]: Start difference. First operand 81 states and 117 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:07,061 INFO L93 Difference]: Finished difference Result 307 states and 450 transitions. [2022-11-03 01:52:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:07,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:07,065 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:07,065 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:07,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:07,067 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 324 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:07,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 438 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:07,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 83. [2022-11-03 01:52:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.451219512195122) internal successors, (119), 82 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 119 transitions. [2022-11-03 01:52:07,081 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 119 transitions. Word has length 80 [2022-11-03 01:52:07,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:07,081 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 119 transitions. [2022-11-03 01:52:07,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 119 transitions. [2022-11-03 01:52:07,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:07,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:07,084 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:07,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:07,307 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:07,308 INFO L85 PathProgramCache]: Analyzing trace with hash -634852961, now seen corresponding path program 1 times [2022-11-03 01:52:07,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:07,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503559795] [2022-11-03 01:52:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:07,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:07,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:07,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:07,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:52:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:07,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:52:07,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:07,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:07,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:07,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503559795] [2022-11-03 01:52:07,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503559795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:07,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:07,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:52:07,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656789036] [2022-11-03 01:52:07,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:07,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:52:07,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:52:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:52:07,842 INFO L87 Difference]: Start difference. First operand 83 states and 119 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:08,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:08,107 INFO L93 Difference]: Finished difference Result 238 states and 346 transitions. [2022-11-03 01:52:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:52:08,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:08,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:08,110 INFO L225 Difference]: With dead ends: 238 [2022-11-03 01:52:08,110 INFO L226 Difference]: Without dead ends: 161 [2022-11-03 01:52:08,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:52:08,112 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 325 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:08,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 508 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:52:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-03 01:52:08,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 85. [2022-11-03 01:52:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 84 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-11-03 01:52:08,124 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 80 [2022-11-03 01:52:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:08,125 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-11-03 01:52:08,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-11-03 01:52:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:08,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:08,128 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:08,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:08,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:08,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:08,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:08,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1276189597, now seen corresponding path program 1 times [2022-11-03 01:52:08,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:08,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366757917] [2022-11-03 01:52:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:08,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:08,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:08,355 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:08,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:52:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:08,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:08,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:08,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:08,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:08,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366757917] [2022-11-03 01:52:08,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366757917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:08,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:08,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:08,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836376116] [2022-11-03 01:52:08,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:08,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:08,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:08,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:08,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:08,659 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:08,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:08,700 INFO L93 Difference]: Finished difference Result 307 states and 448 transitions. [2022-11-03 01:52:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:08,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:08,703 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:08,703 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:08,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:08,705 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 312 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:08,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 436 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 87. [2022-11-03 01:52:08,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.430232558139535) internal successors, (123), 86 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 123 transitions. [2022-11-03 01:52:08,716 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 123 transitions. Word has length 80 [2022-11-03 01:52:08,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:08,717 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 123 transitions. [2022-11-03 01:52:08,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:08,718 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 123 transitions. [2022-11-03 01:52:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:08,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:08,720 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:08,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:08,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:08,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:08,936 INFO L85 PathProgramCache]: Analyzing trace with hash 308838943, now seen corresponding path program 1 times [2022-11-03 01:52:08,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:08,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534373909] [2022-11-03 01:52:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:08,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:08,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:08,939 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:08,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:52:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:09,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:09,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:09,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:09,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:09,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534373909] [2022-11-03 01:52:09,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534373909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:09,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:09,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:09,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684639510] [2022-11-03 01:52:09,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:09,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:09,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:09,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:09,253 INFO L87 Difference]: Start difference. First operand 87 states and 123 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:09,292 INFO L93 Difference]: Finished difference Result 307 states and 447 transitions. [2022-11-03 01:52:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:09,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:09,294 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:09,295 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:09,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:09,297 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 306 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:09,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 435 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 89. [2022-11-03 01:52:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4204545454545454) internal successors, (125), 88 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 125 transitions. [2022-11-03 01:52:09,306 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 125 transitions. Word has length 80 [2022-11-03 01:52:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:09,307 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 125 transitions. [2022-11-03 01:52:09,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:09,307 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 125 transitions. [2022-11-03 01:52:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:09,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:09,309 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:09,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:09,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:09,526 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:09,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:09,527 INFO L85 PathProgramCache]: Analyzing trace with hash -183787231, now seen corresponding path program 1 times [2022-11-03 01:52:09,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:09,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569329266] [2022-11-03 01:52:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:09,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:09,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:09,531 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:09,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:52:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:09,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:09,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:09,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:09,903 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:09,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569329266] [2022-11-03 01:52:09,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569329266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:09,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:09,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:09,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410770731] [2022-11-03 01:52:09,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:09,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:09,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:09,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:09,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:09,913 INFO L87 Difference]: Start difference. First operand 89 states and 125 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:09,970 INFO L93 Difference]: Finished difference Result 307 states and 446 transitions. [2022-11-03 01:52:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:09,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:09,973 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:09,974 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:09,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:09,980 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 300 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:09,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 434 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:09,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 91. [2022-11-03 01:52:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4111111111111112) internal successors, (127), 90 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) [2022-11-03 01:52:09,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 127 transitions. [2022-11-03 01:52:09,988 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 127 transitions. Word has length 80 [2022-11-03 01:52:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:09,988 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 127 transitions. [2022-11-03 01:52:09,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 127 transitions. [2022-11-03 01:52:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:09,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:09,995 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:10,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:10,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:10,212 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1399940957, now seen corresponding path program 1 times [2022-11-03 01:52:10,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:10,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28913767] [2022-11-03 01:52:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:10,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:10,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:10,215 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:10,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:52:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:10,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:10,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:10,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:10,582 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:10,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28913767] [2022-11-03 01:52:10,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28913767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:10,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:10,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:10,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699177792] [2022-11-03 01:52:10,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:10,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:10,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:10,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:10,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:10,586 INFO L87 Difference]: Start difference. First operand 91 states and 127 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:10,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:10,628 INFO L93 Difference]: Finished difference Result 307 states and 445 transitions. [2022-11-03 01:52:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:10,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:10,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:10,631 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:10,631 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:10,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:10,634 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 289 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:10,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 433 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:10,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 95. [2022-11-03 01:52:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.4042553191489362) internal successors, (132), 94 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 132 transitions. [2022-11-03 01:52:10,648 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 132 transitions. Word has length 80 [2022-11-03 01:52:10,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:10,649 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 132 transitions. [2022-11-03 01:52:10,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 132 transitions. [2022-11-03 01:52:10,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:10,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:10,663 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:10,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-03 01:52:10,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:10,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:10,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:10,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1817337563, now seen corresponding path program 1 times [2022-11-03 01:52:10,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:10,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864144304] [2022-11-03 01:52:10,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:10,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:10,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:10,882 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:10,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:52:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:11,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:11,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:11,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:11,199 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:11,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864144304] [2022-11-03 01:52:11,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864144304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:11,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:11,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:11,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357172930] [2022-11-03 01:52:11,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:11,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:11,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:11,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:11,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:11,203 INFO L87 Difference]: Start difference. First operand 95 states and 132 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:11,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:11,242 INFO L93 Difference]: Finished difference Result 307 states and 444 transitions. [2022-11-03 01:52:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:11,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:11,244 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:11,244 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:11,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:11,246 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 283 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:11,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 432 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 97. [2022-11-03 01:52:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.3958333333333333) internal successors, (134), 96 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) [2022-11-03 01:52:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 134 transitions. [2022-11-03 01:52:11,260 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 134 transitions. Word has length 80 [2022-11-03 01:52:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:11,261 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 134 transitions. [2022-11-03 01:52:11,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 134 transitions. [2022-11-03 01:52:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:11,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:11,265 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:11,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:11,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:11,483 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:11,483 INFO L85 PathProgramCache]: Analyzing trace with hash 144237095, now seen corresponding path program 1 times [2022-11-03 01:52:11,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:11,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049101037] [2022-11-03 01:52:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:11,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:11,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:11,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:11,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:52:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:11,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:52:11,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:11,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:11,973 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:11,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049101037] [2022-11-03 01:52:11,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049101037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:11,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:11,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:52:11,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898785892] [2022-11-03 01:52:11,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:11,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:52:11,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:52:11,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:11,976 INFO L87 Difference]: Start difference. First operand 97 states and 134 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:12,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:12,090 INFO L93 Difference]: Finished difference Result 328 states and 472 transitions. [2022-11-03 01:52:12,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:52:12,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:12,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:12,092 INFO L225 Difference]: With dead ends: 328 [2022-11-03 01:52:12,093 INFO L226 Difference]: Without dead ends: 251 [2022-11-03 01:52:12,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:52:12,094 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 413 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:12,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 637 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-03 01:52:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 101. [2022-11-03 01:52:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.39) internal successors, (139), 100 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 139 transitions. [2022-11-03 01:52:12,101 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 139 transitions. Word has length 80 [2022-11-03 01:52:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:12,101 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 139 transitions. [2022-11-03 01:52:12,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 139 transitions. [2022-11-03 01:52:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:12,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:12,103 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:12,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:12,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:12,324 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:12,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1405154345, now seen corresponding path program 1 times [2022-11-03 01:52:12,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:12,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518123746] [2022-11-03 01:52:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:12,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:12,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:12,327 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:12,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:52:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:12,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:12,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:12,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:12,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:12,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518123746] [2022-11-03 01:52:12,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518123746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:12,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:12,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:12,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288283707] [2022-11-03 01:52:12,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:12,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:12,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:12,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:12,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:12,667 INFO L87 Difference]: Start difference. First operand 101 states and 139 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:12,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:12,760 INFO L93 Difference]: Finished difference Result 307 states and 442 transitions. [2022-11-03 01:52:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:12,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:12,762 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:12,763 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:12,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:12,764 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 266 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:12,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 409 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 103. [2022-11-03 01:52:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.3823529411764706) internal successors, (141), 102 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2022-11-03 01:52:12,770 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 80 [2022-11-03 01:52:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:12,771 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2022-11-03 01:52:12,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2022-11-03 01:52:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:12,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:12,773 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:12,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:12,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:12,986 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1503027541, now seen corresponding path program 1 times [2022-11-03 01:52:12,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:12,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5741226] [2022-11-03 01:52:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:12,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:12,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:12,990 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:12,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:52:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:13,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:52:13,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:13,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:13,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:13,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5741226] [2022-11-03 01:52:13,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5741226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:13,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:13,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:52:13,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113922837] [2022-11-03 01:52:13,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:13,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:52:13,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:13,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:52:13,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:13,532 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:13,648 INFO L93 Difference]: Finished difference Result 328 states and 470 transitions. [2022-11-03 01:52:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:52:13,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:13,650 INFO L225 Difference]: With dead ends: 328 [2022-11-03 01:52:13,651 INFO L226 Difference]: Without dead ends: 251 [2022-11-03 01:52:13,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:52:13,652 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 399 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:13,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 629 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-03 01:52:13,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 105. [2022-11-03 01:52:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.375) internal successors, (143), 104 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 143 transitions. [2022-11-03 01:52:13,657 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 143 transitions. Word has length 80 [2022-11-03 01:52:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:13,658 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 143 transitions. [2022-11-03 01:52:13,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 143 transitions. [2022-11-03 01:52:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:13,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:13,660 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:13,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:13,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:13,874 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:13,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1059126867, now seen corresponding path program 1 times [2022-11-03 01:52:13,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:13,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858923390] [2022-11-03 01:52:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:13,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:13,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:13,878 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:13,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:52:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:14,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:14,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:14,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:14,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858923390] [2022-11-03 01:52:14,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858923390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:14,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:14,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:14,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376890375] [2022-11-03 01:52:14,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:14,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:14,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:14,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:14,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:14,236 INFO L87 Difference]: Start difference. First operand 105 states and 143 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:14,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:14,332 INFO L93 Difference]: Finished difference Result 307 states and 440 transitions. [2022-11-03 01:52:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:14,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:14,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:14,334 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:14,334 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:14,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:14,336 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 254 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:14,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 407 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 107. [2022-11-03 01:52:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.3679245283018868) internal successors, (145), 106 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 145 transitions. [2022-11-03 01:52:14,342 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 145 transitions. Word has length 80 [2022-11-03 01:52:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:14,343 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 145 transitions. [2022-11-03 01:52:14,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 145 transitions. [2022-11-03 01:52:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:14,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:14,346 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:14,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:14,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:14,563 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:14,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1207254319, now seen corresponding path program 1 times [2022-11-03 01:52:14,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:14,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694499804] [2022-11-03 01:52:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:14,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:14,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:14,567 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:14,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:52:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:14,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:14,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:14,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:14,980 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:14,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694499804] [2022-11-03 01:52:14,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694499804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:14,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:14,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:14,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460437395] [2022-11-03 01:52:14,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:14,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:14,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:14,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:14,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:14,983 INFO L87 Difference]: Start difference. First operand 107 states and 145 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:15,073 INFO L93 Difference]: Finished difference Result 307 states and 439 transitions. [2022-11-03 01:52:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:15,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:15,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:15,076 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:15,076 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:15,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:15,077 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 248 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:15,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 406 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 109. [2022-11-03 01:52:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.3611111111111112) internal successors, (147), 108 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2022-11-03 01:52:15,085 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 80 [2022-11-03 01:52:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:15,086 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2022-11-03 01:52:15,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2022-11-03 01:52:15,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:15,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:15,088 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:15,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:15,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:15,305 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:15,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1191735601, now seen corresponding path program 1 times [2022-11-03 01:52:15,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:15,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555197600] [2022-11-03 01:52:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:15,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:15,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:15,308 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:15,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:52:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:15,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:15,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:15,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:15,647 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:15,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555197600] [2022-11-03 01:52:15,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555197600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:15,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:15,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:15,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343982731] [2022-11-03 01:52:15,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:15,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:15,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:15,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:15,650 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:15,687 INFO L93 Difference]: Finished difference Result 307 states and 438 transitions. [2022-11-03 01:52:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:15,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:15,689 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:15,689 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:15,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:15,691 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 242 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:15,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 429 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:15,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 111. [2022-11-03 01:52:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.3545454545454545) internal successors, (149), 110 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 149 transitions. [2022-11-03 01:52:15,697 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 149 transitions. Word has length 80 [2022-11-03 01:52:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:15,698 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 149 transitions. [2022-11-03 01:52:15,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 149 transitions. [2022-11-03 01:52:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:15,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:15,699 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:15,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:15,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:15,916 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:15,916 INFO L85 PathProgramCache]: Analyzing trace with hash 838647219, now seen corresponding path program 1 times [2022-11-03 01:52:15,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:15,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051963923] [2022-11-03 01:52:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:15,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:15,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:15,919 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:15,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:52:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:16,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:16,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:16,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:16,285 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:16,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051963923] [2022-11-03 01:52:16,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051963923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:16,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:16,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:16,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041100088] [2022-11-03 01:52:16,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:16,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:16,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:16,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:16,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:16,289 INFO L87 Difference]: Start difference. First operand 111 states and 149 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:16,324 INFO L93 Difference]: Finished difference Result 307 states and 437 transitions. [2022-11-03 01:52:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:16,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:16,326 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:16,327 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:16,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:16,330 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 236 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:16,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 428 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:16,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:16,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 113. [2022-11-03 01:52:16,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3482142857142858) internal successors, (151), 112 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:16,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 151 transitions. [2022-11-03 01:52:16,337 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 151 transitions. Word has length 80 [2022-11-03 01:52:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:16,337 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 151 transitions. [2022-11-03 01:52:16,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 151 transitions. [2022-11-03 01:52:16,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:16,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:16,339 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:16,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:16,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:16,552 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:16,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1732133557, now seen corresponding path program 1 times [2022-11-03 01:52:16,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:16,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440322440] [2022-11-03 01:52:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:16,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:16,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:16,554 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:16,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:52:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:16,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:16,923 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:16,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440322440] [2022-11-03 01:52:16,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440322440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:16,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:16,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:16,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522941604] [2022-11-03 01:52:16,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:16,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:16,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:16,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:16,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:16,926 INFO L87 Difference]: Start difference. First operand 113 states and 151 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:16,974 INFO L93 Difference]: Finished difference Result 307 states and 436 transitions. [2022-11-03 01:52:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:16,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:16,976 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:16,976 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:16,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:16,977 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 220 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:16,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 424 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:16,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:16,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 119. [2022-11-03 01:52:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.347457627118644) internal successors, (159), 118 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) [2022-11-03 01:52:16,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 159 transitions. [2022-11-03 01:52:16,986 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 159 transitions. Word has length 80 [2022-11-03 01:52:16,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:16,986 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 159 transitions. [2022-11-03 01:52:16,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:16,987 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 159 transitions. [2022-11-03 01:52:16,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:16,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:16,988 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:17,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:17,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:17,202 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:17,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:17,203 INFO L85 PathProgramCache]: Analyzing trace with hash -113233609, now seen corresponding path program 1 times [2022-11-03 01:52:17,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:17,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208453863] [2022-11-03 01:52:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:17,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:17,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:17,211 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:17,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:52:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:17,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:17,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:17,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:17,591 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:17,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208453863] [2022-11-03 01:52:17,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208453863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:17,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:17,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:17,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743661134] [2022-11-03 01:52:17,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:17,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:17,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:17,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:17,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:17,596 INFO L87 Difference]: Start difference. First operand 119 states and 159 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:17,653 INFO L93 Difference]: Finished difference Result 307 states and 435 transitions. [2022-11-03 01:52:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:17,655 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:17,656 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:17,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:17,658 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 209 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:17,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 417 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:17,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 123. [2022-11-03 01:52:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.3442622950819672) internal successors, (164), 122 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:17,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 164 transitions. [2022-11-03 01:52:17,666 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 164 transitions. Word has length 80 [2022-11-03 01:52:17,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:17,666 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 164 transitions. [2022-11-03 01:52:17,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 164 transitions. [2022-11-03 01:52:17,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:17,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:17,668 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:17,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:17,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:17,885 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:17,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:17,886 INFO L85 PathProgramCache]: Analyzing trace with hash -957239111, now seen corresponding path program 1 times [2022-11-03 01:52:17,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:17,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327266024] [2022-11-03 01:52:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:17,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:17,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:17,888 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:17,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:52:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:18,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:18,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:18,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:18,309 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:18,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327266024] [2022-11-03 01:52:18,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327266024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:18,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:18,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:18,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580516123] [2022-11-03 01:52:18,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:18,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:18,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:18,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:18,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:18,316 INFO L87 Difference]: Start difference. First operand 123 states and 164 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:18,365 INFO L93 Difference]: Finished difference Result 307 states and 434 transitions. [2022-11-03 01:52:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:18,367 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:18,368 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:18,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:18,369 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 203 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:18,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 422 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:18,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 125. [2022-11-03 01:52:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3387096774193548) internal successors, (166), 124 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2022-11-03 01:52:18,375 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 80 [2022-11-03 01:52:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:18,376 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2022-11-03 01:52:18,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2022-11-03 01:52:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:18,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:18,377 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:18,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:18,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:18,600 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1029625669, now seen corresponding path program 1 times [2022-11-03 01:52:18,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:18,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253350959] [2022-11-03 01:52:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:18,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:18,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:18,603 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:18,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 01:52:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:18,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:18,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:18,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:18,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:18,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253350959] [2022-11-03 01:52:18,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253350959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:18,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:18,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334639796] [2022-11-03 01:52:18,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:18,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:18,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:18,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:18,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:18,976 INFO L87 Difference]: Start difference. First operand 125 states and 166 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:19,024 INFO L93 Difference]: Finished difference Result 307 states and 433 transitions. [2022-11-03 01:52:19,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:19,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:19,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:19,026 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:19,026 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:19,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:19,028 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 192 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:19,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 415 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 129. [2022-11-03 01:52:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.3359375) internal successors, (171), 128 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 171 transitions. [2022-11-03 01:52:19,035 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 171 transitions. Word has length 80 [2022-11-03 01:52:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:19,036 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 171 transitions. [2022-11-03 01:52:19,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 171 transitions. [2022-11-03 01:52:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:19,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:19,037 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:19,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:19,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:19,254 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:19,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:19,255 INFO L85 PathProgramCache]: Analyzing trace with hash 356577725, now seen corresponding path program 1 times [2022-11-03 01:52:19,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:19,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372405813] [2022-11-03 01:52:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:19,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:19,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:19,257 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:19,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:52:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:19,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:52:19,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:19,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:19,784 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:19,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372405813] [2022-11-03 01:52:19,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372405813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:19,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:19,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:52:19,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189929448] [2022-11-03 01:52:19,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:19,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:52:19,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:19,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:52:19,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:19,787 INFO L87 Difference]: Start difference. First operand 129 states and 171 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:19,893 INFO L93 Difference]: Finished difference Result 328 states and 461 transitions. [2022-11-03 01:52:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:52:19,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:19,896 INFO L225 Difference]: With dead ends: 328 [2022-11-03 01:52:19,896 INFO L226 Difference]: Without dead ends: 251 [2022-11-03 01:52:19,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:52:19,897 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 311 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:19,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 578 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:19,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-03 01:52:19,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 133. [2022-11-03 01:52:19,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.3333333333333333) internal successors, (176), 132 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:19,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 176 transitions. [2022-11-03 01:52:19,904 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 176 transitions. Word has length 80 [2022-11-03 01:52:19,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:19,904 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 176 transitions. [2022-11-03 01:52:19,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:19,905 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 176 transitions. [2022-11-03 01:52:19,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:19,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:19,906 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:19,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:20,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:20,122 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:20,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:20,122 INFO L85 PathProgramCache]: Analyzing trace with hash 497126335, now seen corresponding path program 1 times [2022-11-03 01:52:20,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:20,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137060647] [2022-11-03 01:52:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:20,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:20,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:20,124 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:20,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:52:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:20,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:20,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:20,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:20,510 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137060647] [2022-11-03 01:52:20,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137060647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:20,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:20,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:20,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017344456] [2022-11-03 01:52:20,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:20,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:20,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:20,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:20,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:20,514 INFO L87 Difference]: Start difference. First operand 133 states and 176 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:20,605 INFO L93 Difference]: Finished difference Result 307 states and 431 transitions. [2022-11-03 01:52:20,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:20,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:20,608 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:20,608 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:20,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:20,609 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 175 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:20,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 398 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:20,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 135. [2022-11-03 01:52:20,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.328358208955224) internal successors, (178), 134 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 178 transitions. [2022-11-03 01:52:20,616 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 178 transitions. Word has length 80 [2022-11-03 01:52:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:20,616 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 178 transitions. [2022-11-03 01:52:20,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 178 transitions. [2022-11-03 01:52:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:20,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:20,618 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:20,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:20,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:20,835 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:20,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1308311999, now seen corresponding path program 1 times [2022-11-03 01:52:20,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:20,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666403189] [2022-11-03 01:52:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:20,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:20,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:20,837 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:20,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:52:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:21,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:52:21,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:21,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:21,391 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:21,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666403189] [2022-11-03 01:52:21,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666403189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:21,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:21,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:52:21,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188218734] [2022-11-03 01:52:21,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:21,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:52:21,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:21,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:52:21,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:21,394 INFO L87 Difference]: Start difference. First operand 135 states and 178 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:21,511 INFO L93 Difference]: Finished difference Result 328 states and 459 transitions. [2022-11-03 01:52:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:52:21,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:21,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:21,517 INFO L225 Difference]: With dead ends: 328 [2022-11-03 01:52:21,517 INFO L226 Difference]: Without dead ends: 251 [2022-11-03 01:52:21,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:52:21,520 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 297 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:21,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 570 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-03 01:52:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 137. [2022-11-03 01:52:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3235294117647058) internal successors, (180), 136 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 180 transitions. [2022-11-03 01:52:21,528 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 180 transitions. Word has length 80 [2022-11-03 01:52:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:21,529 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 180 transitions. [2022-11-03 01:52:21,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 180 transitions. [2022-11-03 01:52:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:21,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:21,530 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:21,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:21,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:21,747 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:21,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:21,747 INFO L85 PathProgramCache]: Analyzing trace with hash -885610173, now seen corresponding path program 1 times [2022-11-03 01:52:21,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:21,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217311425] [2022-11-03 01:52:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:21,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:21,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:21,749 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:21,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:52:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:22,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:22,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:22,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:22,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:22,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217311425] [2022-11-03 01:52:22,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217311425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:22,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:22,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:22,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510455958] [2022-11-03 01:52:22,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:22,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:22,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:22,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:22,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:22,161 INFO L87 Difference]: Start difference. First operand 137 states and 180 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:22,253 INFO L93 Difference]: Finished difference Result 307 states and 429 transitions. [2022-11-03 01:52:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:22,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:22,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:22,257 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:22,257 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:22,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:22,258 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 163 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:22,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 396 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 139. [2022-11-03 01:52:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.318840579710145) internal successors, (182), 138 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 182 transitions. [2022-11-03 01:52:22,264 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 182 transitions. Word has length 80 [2022-11-03 01:52:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:22,265 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 182 transitions. [2022-11-03 01:52:22,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 182 transitions. [2022-11-03 01:52:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:22,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:22,266 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:22,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:22,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:22,483 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:22,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:22,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1720413381, now seen corresponding path program 1 times [2022-11-03 01:52:22,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:22,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36801386] [2022-11-03 01:52:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:22,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:22,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:22,486 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:22,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:52:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:22,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:22,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:22,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:22,899 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:22,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36801386] [2022-11-03 01:52:22,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36801386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:22,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:22,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:22,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013450593] [2022-11-03 01:52:22,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:22,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:22,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:22,903 INFO L87 Difference]: Start difference. First operand 139 states and 182 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:22,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:22,988 INFO L93 Difference]: Finished difference Result 307 states and 428 transitions. [2022-11-03 01:52:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:22,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:22,990 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:22,990 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:22,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:22,992 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 157 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:22,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 395 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 141. [2022-11-03 01:52:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.3142857142857143) internal successors, (184), 140 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 184 transitions. [2022-11-03 01:52:23,000 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 184 transitions. Word has length 80 [2022-11-03 01:52:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:23,000 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 184 transitions. [2022-11-03 01:52:23,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:23,001 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 184 transitions. [2022-11-03 01:52:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:23,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:23,002 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:23,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:23,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:23,218 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:23,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash 132065479, now seen corresponding path program 1 times [2022-11-03 01:52:23,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:23,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407274948] [2022-11-03 01:52:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:23,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:23,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:23,223 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:23,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:52:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:23,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:23,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:23,637 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:23,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407274948] [2022-11-03 01:52:23,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407274948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:23,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:23,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:23,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892854288] [2022-11-03 01:52:23,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:23,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:23,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:23,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:23,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:23,640 INFO L87 Difference]: Start difference. First operand 141 states and 184 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:23,688 INFO L93 Difference]: Finished difference Result 307 states and 427 transitions. [2022-11-03 01:52:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:23,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:23,691 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:23,691 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:23,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:23,692 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 151 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:23,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 409 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 143. [2022-11-03 01:52:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.3098591549295775) internal successors, (186), 142 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:23,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 186 transitions. [2022-11-03 01:52:23,700 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 186 transitions. Word has length 80 [2022-11-03 01:52:23,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:23,700 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 186 transitions. [2022-11-03 01:52:23,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:23,701 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 186 transitions. [2022-11-03 01:52:23,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:23,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:23,702 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:23,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 01:52:23,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:23,919 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:23,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1147798199, now seen corresponding path program 1 times [2022-11-03 01:52:23,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:23,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430939450] [2022-11-03 01:52:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:23,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:23,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:23,922 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:23,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:52:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:24,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:24,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:24,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:24,322 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:24,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430939450] [2022-11-03 01:52:24,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430939450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:24,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:24,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:24,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681425709] [2022-11-03 01:52:24,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:24,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:24,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:24,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:24,327 INFO L87 Difference]: Start difference. First operand 143 states and 186 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:24,364 INFO L93 Difference]: Finished difference Result 307 states and 426 transitions. [2022-11-03 01:52:24,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:24,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:24,370 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:24,371 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:24,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:24,373 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 145 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:24,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 417 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 145. [2022-11-03 01:52:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3055555555555556) internal successors, (188), 144 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2022-11-03 01:52:24,391 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 80 [2022-11-03 01:52:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:24,391 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2022-11-03 01:52:24,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:24,392 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2022-11-03 01:52:24,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:24,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:24,394 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:24,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:24,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:24,607 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:24,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1734604213, now seen corresponding path program 1 times [2022-11-03 01:52:24,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:24,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865273654] [2022-11-03 01:52:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:24,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:24,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:24,610 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:24,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:52:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:24,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:24,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:25,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:25,009 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:25,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865273654] [2022-11-03 01:52:25,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865273654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:25,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:25,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772938721] [2022-11-03 01:52:25,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:25,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:25,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:25,011 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:25,064 INFO L93 Difference]: Finished difference Result 307 states and 425 transitions. [2022-11-03 01:52:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:25,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:25,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:25,069 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:25,069 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:25,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:25,075 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 139 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:25,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 413 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 147. [2022-11-03 01:52:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3013698630136987) internal successors, (190), 146 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2022-11-03 01:52:25,083 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 80 [2022-11-03 01:52:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:25,083 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2022-11-03 01:52:25,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:25,084 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2022-11-03 01:52:25,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:25,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:25,085 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:25,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:25,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:25,299 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1033539635, now seen corresponding path program 1 times [2022-11-03 01:52:25,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:25,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998824982] [2022-11-03 01:52:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:25,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:25,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:25,302 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:25,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:52:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:25,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:25,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:25,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:25,722 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:25,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998824982] [2022-11-03 01:52:25,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998824982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:25,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:25,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:25,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585098567] [2022-11-03 01:52:25,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:25,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:25,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:25,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:25,725 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:25,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:25,808 INFO L93 Difference]: Finished difference Result 307 states and 424 transitions. [2022-11-03 01:52:25,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:25,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:25,810 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:25,810 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:25,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:25,812 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 128 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:25,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 391 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 151. [2022-11-03 01:52:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.3) internal successors, (195), 150 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) [2022-11-03 01:52:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 195 transitions. [2022-11-03 01:52:25,831 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 195 transitions. Word has length 80 [2022-11-03 01:52:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:25,832 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 195 transitions. [2022-11-03 01:52:25,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 195 transitions. [2022-11-03 01:52:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:25,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:25,834 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:25,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:26,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:26,051 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:26,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash 741467727, now seen corresponding path program 1 times [2022-11-03 01:52:26,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:26,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000033764] [2022-11-03 01:52:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:26,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:26,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:26,054 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:26,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 01:52:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:26,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:52:26,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:26,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:26,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:26,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000033764] [2022-11-03 01:52:26,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000033764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:26,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:52:26,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:52:26,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50241650] [2022-11-03 01:52:26,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:26,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:52:26,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:26,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:52:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:52:26,441 INFO L87 Difference]: Start difference. First operand 151 states and 195 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:26,523 INFO L93 Difference]: Finished difference Result 307 states and 423 transitions. [2022-11-03 01:52:26,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:52:26,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:26,525 INFO L225 Difference]: With dead ends: 307 [2022-11-03 01:52:26,525 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:26,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:52:26,527 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 122 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:26,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 390 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 153. [2022-11-03 01:52:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2960526315789473) internal successors, (197), 152 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) [2022-11-03 01:52:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-11-03 01:52:26,533 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 80 [2022-11-03 01:52:26,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:26,533 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-11-03 01:52:26,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-11-03 01:52:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:52:26,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:26,535 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 01:52:26,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:26,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:26,751 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:26,751 INFO L85 PathProgramCache]: Analyzing trace with hash 743314769, now seen corresponding path program 1 times [2022-11-03 01:52:26,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:26,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797225801] [2022-11-03 01:52:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:26,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:26,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:26,753 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:26,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 01:52:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:26,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:52:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:27,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:29,564 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:29,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797225801] [2022-11-03 01:52:29,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797225801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:29,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [516120156] [2022-11-03 01:52:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:29,566 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:29,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:29,570 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:29,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 01:52:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:29,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:52:29,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:30,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:31,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [516120156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:31,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669365336] [2022-11-03 01:52:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:31,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:31,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:31,826 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:31,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 01:52:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:52:32,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:32,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:34,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669365336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:34,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:52:34,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 01:52:34,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402151817] [2022-11-03 01:52:34,003 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:34,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:52:34,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:34,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:52:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:52:34,005 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 16 states, 16 states have (on average 10.125) internal successors, (162), 16 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:34,389 INFO L93 Difference]: Finished difference Result 232 states and 312 transitions. [2022-11-03 01:52:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:52:34,390 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.125) internal successors, (162), 16 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 01:52:34,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:34,391 INFO L225 Difference]: With dead ends: 232 [2022-11-03 01:52:34,392 INFO L226 Difference]: Without dead ends: 230 [2022-11-03 01:52:34,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 458 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:52:34,393 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 505 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:34,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 965 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2022-11-03 01:52:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-03 01:52:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 156. [2022-11-03 01:52:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.2903225806451613) internal successors, (200), 155 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) [2022-11-03 01:52:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 200 transitions. [2022-11-03 01:52:34,400 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 200 transitions. Word has length 80 [2022-11-03 01:52:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:34,401 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 200 transitions. [2022-11-03 01:52:34,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.125) internal successors, (162), 16 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 200 transitions. [2022-11-03 01:52:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:52:34,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:34,403 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:52:34,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:34,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:34,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-11-03 01:52:35,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:35,019 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:35,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1759749547, now seen corresponding path program 1 times [2022-11-03 01:52:35,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:35,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91342075] [2022-11-03 01:52:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:35,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:35,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:35,022 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:35,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 01:52:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:52:35,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:35,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:35,932 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91342075] [2022-11-03 01:52:35,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91342075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [603417198] [2022-11-03 01:52:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:35,933 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:35,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:35,935 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:35,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 01:52:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:36,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:52:36,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 01:52:36,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:36,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [603417198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:36,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:52:36,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:52:36,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663560325] [2022-11-03 01:52:36,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:36,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:52:36,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:36,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:52:36,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:52:36,532 INFO L87 Difference]: Start difference. First operand 156 states and 200 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:36,642 INFO L93 Difference]: Finished difference Result 414 states and 565 transitions. [2022-11-03 01:52:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:52:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 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 155 [2022-11-03 01:52:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:36,645 INFO L225 Difference]: With dead ends: 414 [2022-11-03 01:52:36,645 INFO L226 Difference]: Without dead ends: 298 [2022-11-03 01:52:36,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:52:36,646 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 393 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:36,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 497 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-03 01:52:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 186. [2022-11-03 01:52:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.3135135135135134) internal successors, (243), 185 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 243 transitions. [2022-11-03 01:52:36,654 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 243 transitions. Word has length 155 [2022-11-03 01:52:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:36,655 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 243 transitions. [2022-11-03 01:52:36,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:36,655 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 243 transitions. [2022-11-03 01:52:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:52:36,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:36,657 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:52:36,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:36,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:37,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:37,076 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1058684969, now seen corresponding path program 1 times [2022-11-03 01:52:37,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:37,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166749057] [2022-11-03 01:52:37,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:37,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:37,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:37,078 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:37,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 01:52:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:37,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:52:37,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:37,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:37,845 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166749057] [2022-11-03 01:52:37,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166749057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [122891940] [2022-11-03 01:52:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:37,846 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:37,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:37,847 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:37,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 01:52:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:38,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:52:38,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:52:38,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:38,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [122891940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:38,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:52:38,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:52:38,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696179139] [2022-11-03 01:52:38,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:38,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:52:38,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:38,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:52:38,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:52:38,446 INFO L87 Difference]: Start difference. First operand 186 states and 243 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:38,575 INFO L93 Difference]: Finished difference Result 587 states and 828 transitions. [2022-11-03 01:52:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:52:38,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 0 states have call successors, (0), 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 155 [2022-11-03 01:52:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:38,579 INFO L225 Difference]: With dead ends: 587 [2022-11-03 01:52:38,579 INFO L226 Difference]: Without dead ends: 480 [2022-11-03 01:52:38,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:52:38,580 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 375 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:38,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 734 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:38,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-11-03 01:52:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 264. [2022-11-03 01:52:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.361216730038023) internal successors, (358), 263 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 358 transitions. [2022-11-03 01:52:38,607 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 358 transitions. Word has length 155 [2022-11-03 01:52:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:38,608 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 358 transitions. [2022-11-03 01:52:38,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 358 transitions. [2022-11-03 01:52:38,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:52:38,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:38,612 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:52:38,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-03 01:52:38,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:39,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:39,013 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:39,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1738743339, now seen corresponding path program 1 times [2022-11-03 01:52:39,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:39,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108274051] [2022-11-03 01:52:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:39,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:39,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:39,015 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:39,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 01:52:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:39,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:52:39,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:39,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:39,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:39,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108274051] [2022-11-03 01:52:39,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108274051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:39,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1522881114] [2022-11-03 01:52:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:39,769 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:39,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:39,772 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:39,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 01:52:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:40,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:52:40,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:40,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 75 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:40,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1522881114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:40,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426513403] [2022-11-03 01:52:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:40,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:40,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:40,829 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:40,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 01:52:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:41,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:52:41,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:52:41,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:52:41,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426513403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:41,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:52:41,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 7, 7] total 18 [2022-11-03 01:52:41,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214288428] [2022-11-03 01:52:41,744 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:41,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 01:52:41,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 01:52:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:52:41,747 INFO L87 Difference]: Start difference. First operand 264 states and 358 transitions. Second operand has 18 states, 18 states have (on average 15.944444444444445) internal successors, (287), 18 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:44,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:44,977 INFO L93 Difference]: Finished difference Result 2965 states and 4290 transitions. [2022-11-03 01:52:44,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-03 01:52:44,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.944444444444445) internal successors, (287), 18 states have internal predecessors, (287), 0 states have call successors, (0), 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 155 [2022-11-03 01:52:44,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:44,988 INFO L225 Difference]: With dead ends: 2965 [2022-11-03 01:52:44,988 INFO L226 Difference]: Without dead ends: 2745 [2022-11-03 01:52:44,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 906 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1372, Invalid=4948, Unknown=0, NotChecked=0, Total=6320 [2022-11-03 01:52:44,993 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 3466 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3466 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:44,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3466 Valid, 1630 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:52:44,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-11-03 01:52:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 429. [2022-11-03 01:52:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.3831775700934579) internal successors, (592), 428 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 592 transitions. [2022-11-03 01:52:45,024 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 592 transitions. Word has length 155 [2022-11-03 01:52:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:45,025 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 592 transitions. [2022-11-03 01:52:45,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.944444444444445) internal successors, (287), 18 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 592 transitions. [2022-11-03 01:52:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:52:45,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:45,027 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:52:45,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:45,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:45,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-03 01:52:45,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:45,642 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:45,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:45,642 INFO L85 PathProgramCache]: Analyzing trace with hash -848644391, now seen corresponding path program 1 times [2022-11-03 01:52:45,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:45,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134913900] [2022-11-03 01:52:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:45,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:45,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:45,645 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:45,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 01:52:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:45,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:52:45,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:52:46,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:52:46,794 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:46,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134913900] [2022-11-03 01:52:46,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134913900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:46,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [586919517] [2022-11-03 01:52:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:46,794 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:46,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:46,795 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:46,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 01:52:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:47,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:52:47,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:52:47,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:47,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [586919517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:47,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:52:47,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 11] total 23 [2022-11-03 01:52:47,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552057171] [2022-11-03 01:52:47,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:47,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:52:47,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:47,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:52:47,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:52:47,270 INFO L87 Difference]: Start difference. First operand 429 states and 592 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:47,397 INFO L93 Difference]: Finished difference Result 1475 states and 2109 transitions. [2022-11-03 01:52:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:52:47,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 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 155 [2022-11-03 01:52:47,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:47,401 INFO L225 Difference]: With dead ends: 1475 [2022-11-03 01:52:47,402 INFO L226 Difference]: Without dead ends: 1125 [2022-11-03 01:52:47,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 443 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:52:47,403 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 538 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:47,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 434 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-11-03 01:52:47,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 437. [2022-11-03 01:52:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.3830275229357798) internal successors, (603), 436 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 603 transitions. [2022-11-03 01:52:47,420 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 603 transitions. Word has length 155 [2022-11-03 01:52:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:47,420 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 603 transitions. [2022-11-03 01:52:47,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 603 transitions. [2022-11-03 01:52:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:52:47,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:47,422 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:52:47,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:47,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 01:52:47,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:52:47,825 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:47,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2064798117, now seen corresponding path program 1 times [2022-11-03 01:52:47,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:47,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447513107] [2022-11-03 01:52:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:47,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:47,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:47,828 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:47,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 01:52:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:48,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:52:48,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:52:48,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:52:48,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:48,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447513107] [2022-11-03 01:52:48,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447513107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:48,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412582731] [2022-11-03 01:52:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:48,836 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:48,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:48,838 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:48,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 01:52:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:49,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:52:49,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 01:52:49,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:49,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [412582731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:49,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:52:49,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 11] total 23 [2022-11-03 01:52:49,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009046752] [2022-11-03 01:52:49,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:49,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:52:49,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:52:49,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:52:49,404 INFO L87 Difference]: Start difference. First operand 437 states and 603 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:49,553 INFO L93 Difference]: Finished difference Result 1395 states and 1987 transitions. [2022-11-03 01:52:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:52:49,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 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 155 [2022-11-03 01:52:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:49,558 INFO L225 Difference]: With dead ends: 1395 [2022-11-03 01:52:49,559 INFO L226 Difference]: Without dead ends: 1037 [2022-11-03 01:52:49,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 443 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:52:49,562 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 341 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:49,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 511 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-11-03 01:52:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 485. [2022-11-03 01:52:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.378099173553719) internal successors, (667), 484 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 667 transitions. [2022-11-03 01:52:49,580 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 667 transitions. Word has length 155 [2022-11-03 01:52:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:49,581 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 667 transitions. [2022-11-03 01:52:49,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 667 transitions. [2022-11-03 01:52:49,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:52:49,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:49,583 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:52:49,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:49,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:50,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:50,001 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:50,002 INFO L85 PathProgramCache]: Analyzing trace with hash -678594723, now seen corresponding path program 1 times [2022-11-03 01:52:50,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:50,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288333226] [2022-11-03 01:52:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:50,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:50,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:50,004 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:50,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 01:52:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:50,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:52:50,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:52:50,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:52:51,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:51,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288333226] [2022-11-03 01:52:51,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288333226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:51,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [11869481] [2022-11-03 01:52:51,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:51,135 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:51,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:51,136 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:51,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 01:52:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:51,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:52:51,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 01:52:51,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:52:51,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [11869481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:52:51,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:52:51,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 11] total 23 [2022-11-03 01:52:51,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407261940] [2022-11-03 01:52:51,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:52:51,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:52:51,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:51,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:52:51,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:52:51,711 INFO L87 Difference]: Start difference. First operand 485 states and 667 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:51,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:51,830 INFO L93 Difference]: Finished difference Result 1555 states and 2203 transitions. [2022-11-03 01:52:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:52:51,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 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 155 [2022-11-03 01:52:51,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:51,834 INFO L225 Difference]: With dead ends: 1555 [2022-11-03 01:52:51,834 INFO L226 Difference]: Without dead ends: 1149 [2022-11-03 01:52:51,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 443 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:52:51,836 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 350 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:51,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 505 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:52:51,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-03 01:52:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 597. [2022-11-03 01:52:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 1.3875838926174497) internal successors, (827), 596 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 827 transitions. [2022-11-03 01:52:51,857 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 827 transitions. Word has length 155 [2022-11-03 01:52:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:51,858 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 827 transitions. [2022-11-03 01:52:51,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 827 transitions. [2022-11-03 01:52:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:52:51,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:51,860 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:52:51,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:52,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-03 01:52:52,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:52,279 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:52,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1958458401, now seen corresponding path program 1 times [2022-11-03 01:52:52,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:52,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841894793] [2022-11-03 01:52:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:52,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:52,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:52,281 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:52,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 01:52:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:52,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:52:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:52:52,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:52:53,199 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:53,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841894793] [2022-11-03 01:52:53,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841894793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:53,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1283014645] [2022-11-03 01:52:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:53,200 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:53,201 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:53,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 01:52:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:53,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:52:53,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:52:54,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:52:54,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1283014645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:54,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974337797] [2022-11-03 01:52:54,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:54,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:54,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:54,255 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:54,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-03 01:52:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:54,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:52:54,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:52:54,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:52:55,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974337797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:55,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:52:55,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 20 [2022-11-03 01:52:55,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906311200] [2022-11-03 01:52:55,012 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:55,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 01:52:55,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 01:52:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:52:55,014 INFO L87 Difference]: Start difference. First operand 597 states and 827 transitions. Second operand has 20 states, 20 states have (on average 11.45) internal successors, (229), 20 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:56,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:56,149 INFO L93 Difference]: Finished difference Result 3675 states and 5233 transitions. [2022-11-03 01:52:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 01:52:56,152 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.45) internal successors, (229), 20 states have internal predecessors, (229), 0 states have call successors, (0), 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 155 [2022-11-03 01:52:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:56,161 INFO L225 Difference]: With dead ends: 3675 [2022-11-03 01:52:56,161 INFO L226 Difference]: Without dead ends: 3157 [2022-11-03 01:52:56,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 903 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 01:52:56,163 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 1743 mSDsluCounter, 4132 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 4369 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:56,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1743 Valid, 4369 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:52:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2022-11-03 01:52:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 1105. [2022-11-03 01:52:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 1.4085144927536233) internal successors, (1555), 1104 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1555 transitions. [2022-11-03 01:52:56,210 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1555 transitions. Word has length 155 [2022-11-03 01:52:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:56,211 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1555 transitions. [2022-11-03 01:52:56,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.45) internal successors, (229), 20 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1555 transitions. [2022-11-03 01:52:56,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:52:56,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:56,213 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:52:56,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:56,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-03 01:52:56,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2022-11-03 01:52:56,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:56,827 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:56,827 INFO L85 PathProgramCache]: Analyzing trace with hash -47415843, now seen corresponding path program 1 times [2022-11-03 01:52:56,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:52:56,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737236946] [2022-11-03 01:52:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:56,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:52:56,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:52:56,829 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:52:56,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 01:52:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:57,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:52:57,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 71 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:57,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:57,651 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:52:57,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737236946] [2022-11-03 01:52:57,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737236946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:57,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [314326686] [2022-11-03 01:52:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:57,653 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:52:57,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:52:57,654 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:52:57,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 01:52:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:58,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:52:58,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 71 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:58,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:58,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [314326686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:58,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966173779] [2022-11-03 01:52:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:58,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:58,599 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:58,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-03 01:52:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:58,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:52:58,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:59,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:52:59,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966173779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:59,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:52:59,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 11, 11] total 34 [2022-11-03 01:52:59,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2648646] [2022-11-03 01:52:59,589 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:59,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 01:52:59,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:52:59,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 01:52:59,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 01:52:59,591 INFO L87 Difference]: Start difference. First operand 1105 states and 1555 transitions. Second operand has 34 states, 34 states have (on average 9.617647058823529) internal successors, (327), 34 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:11,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:11,083 INFO L93 Difference]: Finished difference Result 32098 states and 45601 transitions. [2022-11-03 01:53:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2022-11-03 01:53:11,084 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 9.617647058823529) internal successors, (327), 34 states have internal predecessors, (327), 0 states have call successors, (0), 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 155 [2022-11-03 01:53:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:11,202 INFO L225 Difference]: With dead ends: 32098 [2022-11-03 01:53:11,203 INFO L226 Difference]: Without dead ends: 31072 [2022-11-03 01:53:11,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1122 GetRequests, 892 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22300 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=9340, Invalid=44252, Unknown=0, NotChecked=0, Total=53592 [2022-11-03 01:53:11,242 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 6228 mSDsluCounter, 11375 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6228 SdHoareTripleChecker+Valid, 11583 SdHoareTripleChecker+Invalid, 3454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:11,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6228 Valid, 11583 Invalid, 3454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-03 01:53:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31072 states. [2022-11-03 01:53:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31072 to 4250. [2022-11-03 01:53:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 1.4208048952694752) internal successors, (6037), 4249 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 6037 transitions. [2022-11-03 01:53:11,643 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 6037 transitions. Word has length 155 [2022-11-03 01:53:11,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:11,643 INFO L495 AbstractCegarLoop]: Abstraction has 4250 states and 6037 transitions. [2022-11-03 01:53:11,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 9.617647058823529) internal successors, (327), 34 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 6037 transitions. [2022-11-03 01:53:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:11,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:11,653 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:11,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:11,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:12,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-03 01:53:12,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:12,260 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:12,261 INFO L85 PathProgramCache]: Analyzing trace with hash 372018913, now seen corresponding path program 1 times [2022-11-03 01:53:12,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:12,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082707058] [2022-11-03 01:53:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:12,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:12,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:12,263 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:12,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 01:53:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:53:12,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 69 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:12,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:13,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:13,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082707058] [2022-11-03 01:53:13,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082707058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:13,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1659324579] [2022-11-03 01:53:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:13,316 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:13,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:13,317 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:13,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-03 01:53:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:13,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:13,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:53:13,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:13,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1659324579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:13,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:13,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 20 [2022-11-03 01:53:13,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334604291] [2022-11-03 01:53:13,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:13,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:13,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:13,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:13,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:53:13,809 INFO L87 Difference]: Start difference. First operand 4250 states and 6037 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:13,940 INFO L93 Difference]: Finished difference Result 9406 states and 13413 transitions. [2022-11-03 01:53:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:53:13,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-11-03 01:53:13,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:13,952 INFO L225 Difference]: With dead ends: 9406 [2022-11-03 01:53:13,952 INFO L226 Difference]: Without dead ends: 7312 [2022-11-03 01:53:13,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:53:13,957 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 511 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:13,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 447 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:53:13,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7312 states. [2022-11-03 01:53:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7312 to 4262. [2022-11-03 01:53:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4262 states, 4261 states have (on average 1.4182116873973245) internal successors, (6043), 4261 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4262 states to 4262 states and 6043 transitions. [2022-11-03 01:53:14,133 INFO L78 Accepts]: Start accepts. Automaton has 4262 states and 6043 transitions. Word has length 155 [2022-11-03 01:53:14,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:14,133 INFO L495 AbstractCegarLoop]: Abstraction has 4262 states and 6043 transitions. [2022-11-03 01:53:14,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:14,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4262 states and 6043 transitions. [2022-11-03 01:53:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:14,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:14,144 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:14,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:14,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-11-03 01:53:14,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:14,562 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:14,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:14,563 INFO L85 PathProgramCache]: Analyzing trace with hash -120607261, now seen corresponding path program 1 times [2022-11-03 01:53:14,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:14,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940052272] [2022-11-03 01:53:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:14,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:14,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:14,566 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:14,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 01:53:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:14,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:14,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:15,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:15,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:15,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940052272] [2022-11-03 01:53:15,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940052272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:15,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [296898796] [2022-11-03 01:53:15,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:15,372 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:15,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:15,374 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:15,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-03 01:53:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:15,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:15,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:53:15,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:15,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [296898796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:15,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:15,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:53:15,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956635402] [2022-11-03 01:53:15,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:15,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:15,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:15,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:15,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:53:15,867 INFO L87 Difference]: Start difference. First operand 4262 states and 6043 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:16,043 INFO L93 Difference]: Finished difference Result 12400 states and 17669 transitions. [2022-11-03 01:53:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:53:16,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 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 155 [2022-11-03 01:53:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:16,053 INFO L225 Difference]: With dead ends: 12400 [2022-11-03 01:53:16,053 INFO L226 Difference]: Without dead ends: 8246 [2022-11-03 01:53:16,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:53:16,058 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 438 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:16,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 449 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2022-11-03 01:53:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 4294. [2022-11-03 01:53:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 4293 states have (on average 1.4150943396226414) internal successors, (6075), 4293 states have internal predecessors, (6075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 6075 transitions. [2022-11-03 01:53:16,164 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 6075 transitions. Word has length 155 [2022-11-03 01:53:16,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:16,164 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 6075 transitions. [2022-11-03 01:53:16,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 6075 transitions. [2022-11-03 01:53:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:16,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:16,171 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:16,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:16,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-03 01:53:16,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:16,587 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:16,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2145773925, now seen corresponding path program 1 times [2022-11-03 01:53:16,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:16,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108669064] [2022-11-03 01:53:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:16,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:16,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:16,589 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:16,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 01:53:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:16,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:16,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:17,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:17,429 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:17,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108669064] [2022-11-03 01:53:17,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108669064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:17,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1689244344] [2022-11-03 01:53:17,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:17,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:17,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:17,431 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:17,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-03 01:53:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:17,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:17,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:53:17,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:17,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1689244344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:17,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:17,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:53:17,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092811412] [2022-11-03 01:53:17,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:17,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:17,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:17,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:17,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:53:17,975 INFO L87 Difference]: Start difference. First operand 4294 states and 6075 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:18,150 INFO L93 Difference]: Finished difference Result 8345 states and 11830 transitions. [2022-11-03 01:53:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:53:18,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 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 155 [2022-11-03 01:53:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:18,157 INFO L225 Difference]: With dead ends: 8345 [2022-11-03 01:53:18,157 INFO L226 Difference]: Without dead ends: 4159 [2022-11-03 01:53:18,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:53:18,163 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 434 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:18,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 448 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2022-11-03 01:53:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3053. [2022-11-03 01:53:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 1.4056356487549149) internal successors, (4290), 3052 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 4290 transitions. [2022-11-03 01:53:18,237 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 4290 transitions. Word has length 155 [2022-11-03 01:53:18,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:18,238 INFO L495 AbstractCegarLoop]: Abstraction has 3053 states and 4290 transitions. [2022-11-03 01:53:18,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:18,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 4290 transitions. [2022-11-03 01:53:18,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:18,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:18,242 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:18,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:18,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-11-03 01:53:18,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:18,659 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:18,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2130255207, now seen corresponding path program 1 times [2022-11-03 01:53:18,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:18,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618034658] [2022-11-03 01:53:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:18,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:18,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:18,662 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:18,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 01:53:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:18,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:18,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:19,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:19,460 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:19,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618034658] [2022-11-03 01:53:19,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618034658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:19,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2141532445] [2022-11-03 01:53:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:19,460 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:19,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:19,461 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:19,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 01:53:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:19,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:19,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:53:19,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:19,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2141532445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:19,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:19,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:53:19,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145834490] [2022-11-03 01:53:19,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:19,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:19,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:19,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:19,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:53:19,998 INFO L87 Difference]: Start difference. First operand 3053 states and 4290 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:20,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:20,189 INFO L93 Difference]: Finished difference Result 9514 states and 13435 transitions. [2022-11-03 01:53:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:53:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 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 155 [2022-11-03 01:53:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:20,196 INFO L225 Difference]: With dead ends: 9514 [2022-11-03 01:53:20,197 INFO L226 Difference]: Without dead ends: 6569 [2022-11-03 01:53:20,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:53:20,201 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 450 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:20,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 453 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6569 states. [2022-11-03 01:53:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6569 to 3629. [2022-11-03 01:53:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 1.396361631753032) internal successors, (5066), 3628 states have internal predecessors, (5066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 5066 transitions. [2022-11-03 01:53:20,294 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 5066 transitions. Word has length 155 [2022-11-03 01:53:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:20,294 INFO L495 AbstractCegarLoop]: Abstraction has 3629 states and 5066 transitions. [2022-11-03 01:53:20,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 5066 transitions. [2022-11-03 01:53:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:20,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:20,299 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:20,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:20,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 01:53:20,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:20,703 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:20,703 INFO L85 PathProgramCache]: Analyzing trace with hash 324816873, now seen corresponding path program 1 times [2022-11-03 01:53:20,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:20,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978857116] [2022-11-03 01:53:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:20,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:20,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:20,707 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:20,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 01:53:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:20,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:20,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:21,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:21,481 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:21,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978857116] [2022-11-03 01:53:21,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978857116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:21,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1098863616] [2022-11-03 01:53:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:21,481 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:21,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:21,482 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:21,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 01:53:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:21,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:21,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:53:22,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:22,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1098863616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:22,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:22,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:53:22,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666018847] [2022-11-03 01:53:22,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:22,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:22,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:22,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:22,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:53:22,008 INFO L87 Difference]: Start difference. First operand 3629 states and 5066 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:22,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:22,163 INFO L93 Difference]: Finished difference Result 10218 states and 14315 transitions. [2022-11-03 01:53:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:53:22,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 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 155 [2022-11-03 01:53:22,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:22,169 INFO L225 Difference]: With dead ends: 10218 [2022-11-03 01:53:22,169 INFO L226 Difference]: Without dead ends: 6697 [2022-11-03 01:53:22,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:53:22,174 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 449 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:22,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 452 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6697 states. [2022-11-03 01:53:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6697 to 3757. [2022-11-03 01:53:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3757 states, 3756 states have (on average 1.3849840255591055) internal successors, (5202), 3756 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3757 states to 3757 states and 5202 transitions. [2022-11-03 01:53:22,267 INFO L78 Accepts]: Start accepts. Automaton has 3757 states and 5202 transitions. Word has length 155 [2022-11-03 01:53:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:22,268 INFO L495 AbstractCegarLoop]: Abstraction has 3757 states and 5202 transitions. [2022-11-03 01:53:22,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:22,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3757 states and 5202 transitions. [2022-11-03 01:53:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:22,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:22,272 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:22,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:22,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:22,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:22,686 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:22,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1364126869, now seen corresponding path program 1 times [2022-11-03 01:53:22,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:22,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920411122] [2022-11-03 01:53:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:22,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:22,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:22,688 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:22,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 01:53:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:22,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:23,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:23,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:23,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:23,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920411122] [2022-11-03 01:53:23,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920411122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:23,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [225509210] [2022-11-03 01:53:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:23,490 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:23,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:23,492 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:23,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 01:53:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:23,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:23,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:53:24,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:24,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [225509210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:24,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:24,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:53:24,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678352621] [2022-11-03 01:53:24,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:24,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:24,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:24,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:24,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:53:24,060 INFO L87 Difference]: Start difference. First operand 3757 states and 5202 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:24,219 INFO L93 Difference]: Finished difference Result 10410 states and 14459 transitions. [2022-11-03 01:53:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:53:24,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 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 155 [2022-11-03 01:53:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:24,225 INFO L225 Difference]: With dead ends: 10410 [2022-11-03 01:53:24,225 INFO L226 Difference]: Without dead ends: 6761 [2022-11-03 01:53:24,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:53:24,228 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 447 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:24,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 451 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2022-11-03 01:53:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 3821. [2022-11-03 01:53:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3821 states, 3820 states have (on average 1.3722513089005235) internal successors, (5242), 3820 states have internal predecessors, (5242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5242 transitions. [2022-11-03 01:53:24,313 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5242 transitions. Word has length 155 [2022-11-03 01:53:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:24,314 INFO L495 AbstractCegarLoop]: Abstraction has 3821 states and 5242 transitions. [2022-11-03 01:53:24,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:24,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5242 transitions. [2022-11-03 01:53:24,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:24,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:24,318 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:24,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:24,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:24,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:24,735 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:24,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1342492525, now seen corresponding path program 1 times [2022-11-03 01:53:24,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:24,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291328024] [2022-11-03 01:53:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:24,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:24,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:24,737 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:24,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 01:53:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:25,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:25,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:25,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:25,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:25,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291328024] [2022-11-03 01:53:25,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291328024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:25,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [417972015] [2022-11-03 01:53:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:25,521 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:25,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:25,522 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:25,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-03 01:53:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:25,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:25,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:53:26,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:26,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [417972015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:26,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:26,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:53:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554344297] [2022-11-03 01:53:26,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:26,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:26,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:26,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:26,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:53:26,054 INFO L87 Difference]: Start difference. First operand 3821 states and 5242 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:26,211 INFO L93 Difference]: Finished difference Result 10710 states and 14779 transitions. [2022-11-03 01:53:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:53:26,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 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 155 [2022-11-03 01:53:26,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:26,217 INFO L225 Difference]: With dead ends: 10710 [2022-11-03 01:53:26,217 INFO L226 Difference]: Without dead ends: 6997 [2022-11-03 01:53:26,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:53:26,220 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 451 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:26,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 450 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:26,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6997 states. [2022-11-03 01:53:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6997 to 3973. [2022-11-03 01:53:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3973 states, 3972 states have (on average 1.3683282980866063) internal successors, (5435), 3972 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3973 states to 3973 states and 5435 transitions. [2022-11-03 01:53:26,293 INFO L78 Accepts]: Start accepts. Automaton has 3973 states and 5435 transitions. Word has length 155 [2022-11-03 01:53:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:26,294 INFO L495 AbstractCegarLoop]: Abstraction has 3973 states and 5435 transitions. [2022-11-03 01:53:26,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3973 states and 5435 transitions. [2022-11-03 01:53:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:26,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:26,298 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:26,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:26,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-03 01:53:26,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:26,702 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:26,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1177467409, now seen corresponding path program 1 times [2022-11-03 01:53:26,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:26,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868420083] [2022-11-03 01:53:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:26,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:26,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:26,705 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:26,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 01:53:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:26,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:26,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:27,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:27,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:27,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868420083] [2022-11-03 01:53:27,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868420083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:27,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [952201346] [2022-11-03 01:53:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:27,479 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:27,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:27,480 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:27,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-03 01:53:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:27,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:53:28,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:28,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [952201346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:28,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:28,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:53:28,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117414080] [2022-11-03 01:53:28,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:28,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:28,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:28,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:28,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:53:28,035 INFO L87 Difference]: Start difference. First operand 3973 states and 5435 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:28,224 INFO L93 Difference]: Finished difference Result 10870 states and 14973 transitions. [2022-11-03 01:53:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:53:28,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 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 155 [2022-11-03 01:53:28,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:28,230 INFO L225 Difference]: With dead ends: 10870 [2022-11-03 01:53:28,230 INFO L226 Difference]: Without dead ends: 7005 [2022-11-03 01:53:28,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:53:28,234 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 449 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:28,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 449 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:53:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2022-11-03 01:53:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 3981. [2022-11-03 01:53:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3980 states have (on average 1.3668341708542713) internal successors, (5440), 3980 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 5440 transitions. [2022-11-03 01:53:28,340 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 5440 transitions. Word has length 155 [2022-11-03 01:53:28,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:28,340 INFO L495 AbstractCegarLoop]: Abstraction has 3981 states and 5440 transitions. [2022-11-03 01:53:28,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:28,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 5440 transitions. [2022-11-03 01:53:28,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:28,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:28,345 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:28,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:28,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:28,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:28,759 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:28,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:28,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1175620367, now seen corresponding path program 1 times [2022-11-03 01:53:28,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:28,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974504464] [2022-11-03 01:53:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:28,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:28,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:28,761 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:28,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 01:53:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:29,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:29,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:29,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:29,523 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:29,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974504464] [2022-11-03 01:53:29,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974504464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:29,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2071154245] [2022-11-03 01:53:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:29,523 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:29,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:29,524 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:29,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 01:53:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:30,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:30,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:30,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:30,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2071154245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:30,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125382926] [2022-11-03 01:53:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:30,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:30,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:30,537 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:30,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-03 01:53:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:30,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:30,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:31,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:31,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125382926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:31,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:53:31,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 01:53:31,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634276843] [2022-11-03 01:53:31,220 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:31,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:53:31,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:31,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:53:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:53:31,222 INFO L87 Difference]: Start difference. First operand 3981 states and 5440 transitions. Second operand has 11 states, 11 states have (on average 20.09090909090909) internal successors, (221), 11 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:31,764 INFO L93 Difference]: Finished difference Result 22572 states and 30993 transitions. [2022-11-03 01:53:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:53:31,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.09090909090909) internal successors, (221), 11 states have internal predecessors, (221), 0 states have call successors, (0), 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 155 [2022-11-03 01:53:31,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:31,776 INFO L225 Difference]: With dead ends: 22572 [2022-11-03 01:53:31,776 INFO L226 Difference]: Without dead ends: 18699 [2022-11-03 01:53:31,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:53:31,782 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 751 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:31,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 1599 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:53:31,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18699 states. [2022-11-03 01:53:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18699 to 7852. [2022-11-03 01:53:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7852 states, 7851 states have (on average 1.3700165584002038) internal successors, (10756), 7851 states have internal predecessors, (10756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7852 states to 7852 states and 10756 transitions. [2022-11-03 01:53:31,996 INFO L78 Accepts]: Start accepts. Automaton has 7852 states and 10756 transitions. Word has length 155 [2022-11-03 01:53:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:31,997 INFO L495 AbstractCegarLoop]: Abstraction has 7852 states and 10756 transitions. [2022-11-03 01:53:31,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.09090909090909) internal successors, (221), 11 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7852 states and 10756 transitions. [2022-11-03 01:53:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:32,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:32,003 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:32,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:32,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:32,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-11-03 01:53:32,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:32,617 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:32,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1593016973, now seen corresponding path program 1 times [2022-11-03 01:53:32,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:32,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740689138] [2022-11-03 01:53:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:32,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:32,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:32,620 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:32,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 01:53:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:32,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:32,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:33,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:33,404 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:33,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740689138] [2022-11-03 01:53:33,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740689138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:33,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [630675654] [2022-11-03 01:53:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:33,404 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:33,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:33,405 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:33,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-03 01:53:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:33,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:33,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:53:33,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:33,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [630675654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:33,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:33,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2022-11-03 01:53:33,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135864705] [2022-11-03 01:53:33,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:33,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:33,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:33,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:33,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:53:33,849 INFO L87 Difference]: Start difference. First operand 7852 states and 10756 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:33,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:33,982 INFO L93 Difference]: Finished difference Result 17633 states and 24321 transitions. [2022-11-03 01:53:33,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:53:33,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 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 155 [2022-11-03 01:53:33,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:33,992 INFO L225 Difference]: With dead ends: 17633 [2022-11-03 01:53:33,992 INFO L226 Difference]: Without dead ends: 11523 [2022-11-03 01:53:33,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:53:33,999 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 460 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:33,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 483 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:53:34,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11523 states. [2022-11-03 01:53:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11523 to 4812. [2022-11-03 01:53:34,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4812 states, 4811 states have (on average 1.3550197464144669) internal successors, (6519), 4811 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4812 states to 4812 states and 6519 transitions. [2022-11-03 01:53:34,165 INFO L78 Accepts]: Start accepts. Automaton has 4812 states and 6519 transitions. Word has length 155 [2022-11-03 01:53:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:34,165 INFO L495 AbstractCegarLoop]: Abstraction has 4812 states and 6519 transitions. [2022-11-03 01:53:34,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4812 states and 6519 transitions. [2022-11-03 01:53:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:34,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:34,168 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:34,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:34,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-03 01:53:34,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:34,572 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:34,572 INFO L85 PathProgramCache]: Analyzing trace with hash 368557685, now seen corresponding path program 1 times [2022-11-03 01:53:34,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:34,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943081124] [2022-11-03 01:53:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:34,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:34,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:34,575 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:34,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 01:53:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:34,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:53:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:35,508 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:53:35,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:53:35,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:35,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943081124] [2022-11-03 01:53:35,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943081124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:35,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [734947601] [2022-11-03 01:53:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:35,850 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:35,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:35,851 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:35,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 01:53:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:36,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:36,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:36,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:37,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [734947601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:37,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270675940] [2022-11-03 01:53:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:37,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:37,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:37,134 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:37,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-03 01:53:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:37,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:37,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:37,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270675940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:37,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:53:37,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 8, 8, 8] total 19 [2022-11-03 01:53:37,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284012967] [2022-11-03 01:53:37,932 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:37,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 01:53:37,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:37,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 01:53:37,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:53:37,935 INFO L87 Difference]: Start difference. First operand 4812 states and 6519 transitions. Second operand has 19 states, 19 states have (on average 20.63157894736842) internal successors, (392), 19 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) [2022-11-03 01:53:40,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:40,706 INFO L93 Difference]: Finished difference Result 46682 states and 64175 transitions. [2022-11-03 01:53:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-03 01:53:40,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.63157894736842) internal successors, (392), 19 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 155 [2022-11-03 01:53:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:40,734 INFO L225 Difference]: With dead ends: 46682 [2022-11-03 01:53:40,734 INFO L226 Difference]: Without dead ends: 41978 [2022-11-03 01:53:40,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 906 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=902, Invalid=3130, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 01:53:40,743 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 3291 mSDsluCounter, 5604 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3291 SdHoareTripleChecker+Valid, 5809 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:40,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3291 Valid, 5809 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:53:40,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41978 states. [2022-11-03 01:53:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41978 to 11266. [2022-11-03 01:53:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11266 states, 11265 states have (on average 1.368220150909898) internal successors, (15413), 11265 states have internal predecessors, (15413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:41,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11266 states to 11266 states and 15413 transitions. [2022-11-03 01:53:41,063 INFO L78 Accepts]: Start accepts. Automaton has 11266 states and 15413 transitions. Word has length 155 [2022-11-03 01:53:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:41,064 INFO L495 AbstractCegarLoop]: Abstraction has 11266 states and 15413 transitions. [2022-11-03 01:53:41,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.63157894736842) internal successors, (392), 19 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) [2022-11-03 01:53:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 11266 states and 15413 transitions. [2022-11-03 01:53:41,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:41,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:41,067 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:41,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-03 01:53:41,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:41,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 01:53:41,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:41,683 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:41,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:41,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1091947653, now seen corresponding path program 1 times [2022-11-03 01:53:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:41,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884683074] [2022-11-03 01:53:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:41,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:41,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:41,686 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:41,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 01:53:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:41,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:53:41,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 53 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:53:42,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 53 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:53:42,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:42,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884683074] [2022-11-03 01:53:42,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884683074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:42,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1282087620] [2022-11-03 01:53:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:42,996 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:42,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:42,997 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:42,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-03 01:53:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:43,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:43,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:53:43,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:43,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1282087620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:43,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:43,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 11 [2022-11-03 01:53:43,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102092860] [2022-11-03 01:53:43,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:43,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:43,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:43,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:43,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:53:43,511 INFO L87 Difference]: Start difference. First operand 11266 states and 15413 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:43,788 INFO L93 Difference]: Finished difference Result 26028 states and 35636 transitions. [2022-11-03 01:53:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:53:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-11-03 01:53:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:43,800 INFO L225 Difference]: With dead ends: 26028 [2022-11-03 01:53:43,800 INFO L226 Difference]: Without dead ends: 14870 [2022-11-03 01:53:43,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 455 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:53:43,808 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 538 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:43,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 506 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:53:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14870 states. [2022-11-03 01:53:43,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14870 to 11266. [2022-11-03 01:53:43,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11266 states, 11265 states have (on average 1.3643142476697736) internal successors, (15369), 11265 states have internal predecessors, (15369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11266 states to 11266 states and 15369 transitions. [2022-11-03 01:53:44,010 INFO L78 Accepts]: Start accepts. Automaton has 11266 states and 15369 transitions. Word has length 155 [2022-11-03 01:53:44,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:44,010 INFO L495 AbstractCegarLoop]: Abstraction has 11266 states and 15369 transitions. [2022-11-03 01:53:44,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 11266 states and 15369 transitions. [2022-11-03 01:53:44,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:44,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:44,012 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:44,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Ended with exit code 0 [2022-11-03 01:53:44,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-03 01:53:44,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:44,413 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:44,414 INFO L85 PathProgramCache]: Analyzing trace with hash -648046979, now seen corresponding path program 1 times [2022-11-03 01:53:44,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:44,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851199191] [2022-11-03 01:53:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:44,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:44,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:44,415 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:44,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 01:53:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:44,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:45,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:45,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:45,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851199191] [2022-11-03 01:53:45,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851199191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:45,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [510972705] [2022-11-03 01:53:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:45,304 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:45,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:45,305 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:45,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-03 01:53:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:45,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:53:45,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:45,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [510972705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:45,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:45,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:53:45,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144560577] [2022-11-03 01:53:45,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:45,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:45,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:45,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:45,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:53:45,806 INFO L87 Difference]: Start difference. First operand 11266 states and 15369 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:46,116 INFO L93 Difference]: Finished difference Result 27468 states and 37488 transitions. [2022-11-03 01:53:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:53:46,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-11-03 01:53:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:46,129 INFO L225 Difference]: With dead ends: 27468 [2022-11-03 01:53:46,129 INFO L226 Difference]: Without dead ends: 16310 [2022-11-03 01:53:46,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:53:46,137 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 556 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:46,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 505 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:53:46,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16310 states. [2022-11-03 01:53:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16310 to 11266. [2022-11-03 01:53:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11266 states, 11265 states have (on average 1.3430093209054594) internal successors, (15129), 11265 states have internal predecessors, (15129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11266 states to 11266 states and 15129 transitions. [2022-11-03 01:53:46,448 INFO L78 Accepts]: Start accepts. Automaton has 11266 states and 15129 transitions. Word has length 155 [2022-11-03 01:53:46,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:46,449 INFO L495 AbstractCegarLoop]: Abstraction has 11266 states and 15129 transitions. [2022-11-03 01:53:46,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 11266 states and 15129 transitions. [2022-11-03 01:53:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:46,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:46,452 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:46,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Ended with exit code 0 [2022-11-03 01:53:46,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 01:53:46,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:53:46,856 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:46,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash -507498369, now seen corresponding path program 1 times [2022-11-03 01:53:46,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:46,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727154582] [2022-11-03 01:53:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:46,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:46,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:46,859 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:46,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 01:53:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:47,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:47,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:47,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:47,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:47,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727154582] [2022-11-03 01:53:47,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727154582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:47,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1349902052] [2022-11-03 01:53:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:47,748 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:47,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:47,749 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:47,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-03 01:53:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:48,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:53:48,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:48,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1349902052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:48,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:48,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 01:53:48,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216304687] [2022-11-03 01:53:48,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:48,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:48,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:53:48,255 INFO L87 Difference]: Start difference. First operand 11266 states and 15129 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:48,567 INFO L93 Difference]: Finished difference Result 27852 states and 37456 transitions. [2022-11-03 01:53:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:53:48,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-11-03 01:53:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:48,582 INFO L225 Difference]: With dead ends: 27852 [2022-11-03 01:53:48,582 INFO L226 Difference]: Without dead ends: 16694 [2022-11-03 01:53:48,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:53:48,588 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 556 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:48,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 504 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:53:48,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16694 states. [2022-11-03 01:53:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16694 to 11266. [2022-11-03 01:53:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11266 states, 11265 states have (on average 1.321704394141145) internal successors, (14889), 11265 states have internal predecessors, (14889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11266 states to 11266 states and 14889 transitions. [2022-11-03 01:53:48,845 INFO L78 Accepts]: Start accepts. Automaton has 11266 states and 14889 transitions. Word has length 155 [2022-11-03 01:53:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:48,845 INFO L495 AbstractCegarLoop]: Abstraction has 11266 states and 14889 transitions. [2022-11-03 01:53:48,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 11266 states and 14889 transitions. [2022-11-03 01:53:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:48,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:48,847 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:53:48,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-03 01:53:49,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-11-03 01:53:49,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:49,248 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash -84796543, now seen corresponding path program 1 times [2022-11-03 01:53:49,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:49,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623024869] [2022-11-03 01:53:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:49,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:49,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:49,250 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:49,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 01:53:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:49,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:49,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:49,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:50,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:50,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623024869] [2022-11-03 01:53:50,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623024869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:50,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1425452661] [2022-11-03 01:53:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:50,109 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:50,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:50,110 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:50,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-03 01:53:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:50,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:50,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:51,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:51,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1425452661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:51,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003275313] [2022-11-03 01:53:51,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:51,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:51,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:51,296 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:51,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-03 01:53:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:51,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:51,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:51,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:52,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003275313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:52,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:53:52,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 01:53:52,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774437137] [2022-11-03 01:53:52,039 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:52,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:53:52,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:53:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:53:52,040 INFO L87 Difference]: Start difference. First operand 11266 states and 14889 transitions. Second operand has 11 states, 11 states have (on average 20.454545454545453) internal successors, (225), 11 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:52,855 INFO L93 Difference]: Finished difference Result 63794 states and 84241 transitions. [2022-11-03 01:53:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:53:52,855 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.454545454545453) internal successors, (225), 11 states have internal predecessors, (225), 0 states have call successors, (0), 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 155 [2022-11-03 01:53:52,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:52,887 INFO L225 Difference]: With dead ends: 63794 [2022-11-03 01:53:52,887 INFO L226 Difference]: Without dead ends: 52636 [2022-11-03 01:53:52,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:53:52,894 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 725 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:52,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 1398 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:53:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52636 states. [2022-11-03 01:53:53,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52636 to 22422. [2022-11-03 01:53:53,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22422 states, 22421 states have (on average 1.3154185807947907) internal successors, (29493), 22421 states have internal predecessors, (29493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22422 states to 22422 states and 29493 transitions. [2022-11-03 01:53:53,509 INFO L78 Accepts]: Start accepts. Automaton has 22422 states and 29493 transitions. Word has length 155 [2022-11-03 01:53:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:53,509 INFO L495 AbstractCegarLoop]: Abstraction has 22422 states and 29493 transitions. [2022-11-03 01:53:53,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.454545454545453) internal successors, (225), 11 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 22422 states and 29493 transitions. [2022-11-03 01:53:53,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:53,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:53,513 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:53,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-03 01:53:53,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:53,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:54,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:54,131 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:54,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:54,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1930163709, now seen corresponding path program 1 times [2022-11-03 01:53:54,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:54,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956697634] [2022-11-03 01:53:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:54,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:54,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:54,136 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:54,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 01:53:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:54,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:53:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:54,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:53:55,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:53:55,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956697634] [2022-11-03 01:53:55,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956697634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:55,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1774718471] [2022-11-03 01:53:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:55,118 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:55,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:53:55,119 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:53:55,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-03 01:53:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:55,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:53:55,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:53:55,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:53:55,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1774718471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:53:55,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:55,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2022-11-03 01:53:55,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49259741] [2022-11-03 01:53:55,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:53:55,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:53:55,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:53:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:53:55,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:53:55,559 INFO L87 Difference]: Start difference. First operand 22422 states and 29493 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:55,902 INFO L93 Difference]: Finished difference Result 49518 states and 65017 transitions. [2022-11-03 01:53:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:53:55,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 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 155 [2022-11-03 01:53:55,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:55,933 INFO L225 Difference]: With dead ends: 49518 [2022-11-03 01:53:55,933 INFO L226 Difference]: Without dead ends: 37708 [2022-11-03 01:53:55,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:53:55,945 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 362 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:55,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 513 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:53:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37708 states. [2022-11-03 01:53:56,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37708 to 24102. [2022-11-03 01:53:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24102 states, 24101 states have (on average 1.2934318078088045) internal successors, (31173), 24101 states have internal predecessors, (31173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24102 states to 24102 states and 31173 transitions. [2022-11-03 01:53:56,382 INFO L78 Accepts]: Start accepts. Automaton has 24102 states and 31173 transitions. Word has length 155 [2022-11-03 01:53:56,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:56,383 INFO L495 AbstractCegarLoop]: Abstraction has 24102 states and 31173 transitions. [2022-11-03 01:53:56,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:56,383 INFO L276 IsEmpty]: Start isEmpty. Operand 24102 states and 31173 transitions. [2022-11-03 01:53:56,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 01:53:56,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:56,385 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:56,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:56,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:56,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:53:56,795 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:56,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2002550267, now seen corresponding path program 1 times [2022-11-03 01:53:56,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:53:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567077339] [2022-11-03 01:53:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:56,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:53:56,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:53:56,797 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:53:56,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 01:53:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:57,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:53:57,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 01:53:58,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 01:54:00,629 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:00,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567077339] [2022-11-03 01:54:00,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567077339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:00,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [587480812] [2022-11-03 01:54:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:00,630 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:00,637 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:00,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-03 01:54:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:01,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:54:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 01:54:02,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 01:54:04,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [587480812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:04,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532369145] [2022-11-03 01:54:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:04,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:04,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:04,050 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:04,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-03 01:54:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:04,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 01:54:04,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 01:54:05,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 01:54:07,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532369145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:07,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:54:07,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 01:54:07,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642398717] [2022-11-03 01:54:07,426 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:07,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:54:07,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:07,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:54:07,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:54:07,427 INFO L87 Difference]: Start difference. First operand 24102 states and 31173 transitions. Second operand has 16 states, 16 states have (on average 16.0) internal successors, (256), 16 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:07,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:07,913 INFO L93 Difference]: Finished difference Result 24104 states and 31174 transitions. [2022-11-03 01:54:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:54:07,913 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.0) internal successors, (256), 16 states have internal predecessors, (256), 0 states have call successors, (0), 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 155 [2022-11-03 01:54:07,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:07,930 INFO L225 Difference]: With dead ends: 24104 [2022-11-03 01:54:07,930 INFO L226 Difference]: Without dead ends: 24102 [2022-11-03 01:54:07,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 908 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:54:07,935 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 780 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:07,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 541 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2022-11-03 01:54:07,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24102 states. [2022-11-03 01:54:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24102 to 24080. [2022-11-03 01:54:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24080 states, 24079 states have (on average 1.291291166576685) internal successors, (31093), 24079 states have internal predecessors, (31093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24080 states to 24080 states and 31093 transitions. [2022-11-03 01:54:08,277 INFO L78 Accepts]: Start accepts. Automaton has 24080 states and 31093 transitions. Word has length 155 [2022-11-03 01:54:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:08,277 INFO L495 AbstractCegarLoop]: Abstraction has 24080 states and 31093 transitions. [2022-11-03 01:54:08,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.0) internal successors, (256), 16 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:08,277 INFO L276 IsEmpty]: Start isEmpty. Operand 24080 states and 31093 transitions. [2022-11-03 01:54:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-11-03 01:54:08,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:08,295 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 01:54:08,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:08,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Ended with exit code 0 [2022-11-03 01:54:08,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-11-03 01:54:08,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:08,912 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:08,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1090741811, now seen corresponding path program 1 times [2022-11-03 01:54:08,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:08,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843069069] [2022-11-03 01:54:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:08,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:08,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:08,915 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:08,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-03 01:54:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:09,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:54:09,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 271 proven. 42 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-03 01:54:09,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 271 proven. 42 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-03 01:54:10,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:10,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843069069] [2022-11-03 01:54:10,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843069069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:10,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [792191194] [2022-11-03 01:54:10,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:10,449 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:10,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:10,450 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:10,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-03 01:54:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:11,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:54:11,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 273 proven. 44 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-03 01:54:11,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 273 proven. 44 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-03 01:54:12,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [792191194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:12,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535910409] [2022-11-03 01:54:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:12,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:12,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:12,383 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:12,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-03 01:54:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:12,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:54:12,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 279 proven. 3 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-11-03 01:54:13,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 277 proven. 9 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-03 01:54:13,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535910409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:13,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:54:13,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12, 12, 7, 8] total 48 [2022-11-03 01:54:13,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146010550] [2022-11-03 01:54:13,540 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:13,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 01:54:13,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 01:54:13,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2067, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 01:54:13,543 INFO L87 Difference]: Start difference. First operand 24080 states and 31093 transitions. Second operand has 48 states, 48 states have (on average 11.333333333333334) internal successors, (544), 48 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:22,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:22,779 INFO L93 Difference]: Finished difference Result 83786 states and 106926 transitions. [2022-11-03 01:54:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-03 01:54:22,780 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 11.333333333333334) internal successors, (544), 48 states have internal predecessors, (544), 0 states have call successors, (0), 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 305 [2022-11-03 01:54:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:22,832 INFO L225 Difference]: With dead ends: 83786 [2022-11-03 01:54:22,832 INFO L226 Difference]: Without dead ends: 59792 [2022-11-03 01:54:22,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1909 GetRequests, 1777 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2926, Invalid=14630, Unknown=0, NotChecked=0, Total=17556 [2022-11-03 01:54:22,854 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 5521 mSDsluCounter, 13190 mSDsCounter, 0 mSdLazyCounter, 3698 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5521 SdHoareTripleChecker+Valid, 13683 SdHoareTripleChecker+Invalid, 3870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 3698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:22,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5521 Valid, 13683 Invalid, 3870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 3698 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-03 01:54:22,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59792 states. [2022-11-03 01:54:23,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59792 to 11938. [2022-11-03 01:54:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11938 states, 11937 states have (on average 1.2626288012063331) internal successors, (15072), 11937 states have internal predecessors, (15072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11938 states to 11938 states and 15072 transitions. [2022-11-03 01:54:23,219 INFO L78 Accepts]: Start accepts. Automaton has 11938 states and 15072 transitions. Word has length 305 [2022-11-03 01:54:23,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:23,219 INFO L495 AbstractCegarLoop]: Abstraction has 11938 states and 15072 transitions. [2022-11-03 01:54:23,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 11.333333333333334) internal successors, (544), 48 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 11938 states and 15072 transitions. [2022-11-03 01:54:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-11-03 01:54:23,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:23,227 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:23,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:23,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (92)] Ended with exit code 0 [2022-11-03 01:54:23,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-11-03 01:54:23,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:23,828 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:23,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:23,829 INFO L85 PathProgramCache]: Analyzing trace with hash -42231637, now seen corresponding path program 1 times [2022-11-03 01:54:23,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:23,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129601745] [2022-11-03 01:54:23,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:23,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:23,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:23,831 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:23,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 01:54:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:24,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 2064 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:54:24,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 493 proven. 38 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2022-11-03 01:54:24,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 493 proven. 38 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2022-11-03 01:54:25,109 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:25,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129601745] [2022-11-03 01:54:25,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129601745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:25,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [106165763] [2022-11-03 01:54:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:25,110 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:25,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:25,111 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:25,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-03 01:54:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:26,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 2064 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:54:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 493 proven. 38 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2022-11-03 01:54:26,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 493 proven. 38 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2022-11-03 01:54:27,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [106165763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:27,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326382569] [2022-11-03 01:54:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:27,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:27,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:27,022 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:27,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-03 01:54:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:27,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 2064 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:54:27,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 493 proven. 5 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-11-03 01:54:27,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 493 proven. 5 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-11-03 01:54:28,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326382569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:28,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:54:28,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 7, 7] total 24 [2022-11-03 01:54:28,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751128729] [2022-11-03 01:54:28,031 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:28,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 01:54:28,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:28,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 01:54:28,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:54:28,033 INFO L87 Difference]: Start difference. First operand 11938 states and 15072 transitions. Second operand has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:30,338 INFO L93 Difference]: Finished difference Result 34075 states and 43044 transitions. [2022-11-03 01:54:30,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 01:54:30,339 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 0 states have call successors, (0), 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 455 [2022-11-03 01:54:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:30,354 INFO L225 Difference]: With dead ends: 34075 [2022-11-03 01:54:30,354 INFO L226 Difference]: Without dead ends: 22175 [2022-11-03 01:54:30,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2756 GetRequests, 2700 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=753, Invalid=2327, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:54:30,362 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 2499 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2499 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:30,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2499 Valid, 2295 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:54:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22175 states. [2022-11-03 01:54:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22175 to 10277. [2022-11-03 01:54:30,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 1.2501946282600234) internal successors, (12847), 10276 states have internal predecessors, (12847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:30,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 12847 transitions. [2022-11-03 01:54:30,701 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 12847 transitions. Word has length 455 [2022-11-03 01:54:30,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:30,701 INFO L495 AbstractCegarLoop]: Abstraction has 10277 states and 12847 transitions. [2022-11-03 01:54:30,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 12847 transitions. [2022-11-03 01:54:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2022-11-03 01:54:30,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:30,715 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:30,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:30,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-11-03 01:54:31,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:31,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:54:31,316 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1751550189, now seen corresponding path program 1 times [2022-11-03 01:54:31,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:31,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547306292] [2022-11-03 01:54:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:31,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:31,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:31,319 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:31,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 01:54:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:32,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:54:32,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1002 proven. 108 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2022-11-03 01:54:32,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1002 proven. 108 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2022-11-03 01:54:33,028 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:33,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547306292] [2022-11-03 01:54:33,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547306292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:33,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1329510805] [2022-11-03 01:54:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:33,029 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:33,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:33,030 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:33,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-03 01:54:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:34,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:54:34,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1002 proven. 108 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2022-11-03 01:54:35,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1002 proven. 108 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2022-11-03 01:54:35,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1329510805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:35,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153853432] [2022-11-03 01:54:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:35,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:35,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:35,765 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:35,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-03 01:54:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:36,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:54:36,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1023 proven. 358 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2022-11-03 01:54:38,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1023 proven. 358 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2022-11-03 01:54:39,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153853432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:39,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:54:39,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 12, 12] total 31 [2022-11-03 01:54:39,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478360309] [2022-11-03 01:54:39,482 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:54:39,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 01:54:39,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 01:54:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2022-11-03 01:54:39,486 INFO L87 Difference]: Start difference. First operand 10277 states and 12847 transitions. Second operand has 31 states, 31 states have (on average 21.258064516129032) internal successors, (659), 31 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:46,929 INFO L93 Difference]: Finished difference Result 95418 states and 120086 transitions. [2022-11-03 01:54:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-03 01:54:46,929 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 21.258064516129032) internal successors, (659), 31 states have internal predecessors, (659), 0 states have call successors, (0), 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 605 [2022-11-03 01:54:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:46,999 INFO L225 Difference]: With dead ends: 95418 [2022-11-03 01:54:46,999 INFO L226 Difference]: Without dead ends: 84639 [2022-11-03 01:54:47,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3735 GetRequests, 3595 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5918 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2919, Invalid=17103, Unknown=0, NotChecked=0, Total=20022 [2022-11-03 01:54:47,018 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 6159 mSDsluCounter, 7109 mSDsCounter, 0 mSdLazyCounter, 2530 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6159 SdHoareTripleChecker+Valid, 7670 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:47,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6159 Valid, 7670 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2530 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 01:54:47,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84639 states. [2022-11-03 01:54:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84639 to 27948. [2022-11-03 01:54:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27948 states, 27947 states have (on average 1.242995670376069) internal successors, (34738), 27947 states have internal predecessors, (34738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27948 states to 27948 states and 34738 transitions. [2022-11-03 01:54:48,086 INFO L78 Accepts]: Start accepts. Automaton has 27948 states and 34738 transitions. Word has length 605 [2022-11-03 01:54:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:48,086 INFO L495 AbstractCegarLoop]: Abstraction has 27948 states and 34738 transitions. [2022-11-03 01:54:48,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 21.258064516129032) internal successors, (659), 31 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 27948 states and 34738 transitions. [2022-11-03 01:54:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2022-11-03 01:54:48,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:48,107 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:48,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:48,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:48,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-11-03 01:54:48,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:48,708 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1019015773, now seen corresponding path program 2 times [2022-11-03 01:54:48,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:48,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670983554] [2022-11-03 01:54:48,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:54:48,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:48,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:48,711 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:48,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 01:54:49,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:54:49,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:49,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:54:49,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1008 proven. 77 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2022-11-03 01:54:50,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1082 proven. 3 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2022-11-03 01:54:50,843 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:54:50,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670983554] [2022-11-03 01:54:50,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670983554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:50,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [388599714] [2022-11-03 01:54:50,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:54:50,844 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:54:50,847 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:54:50,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-03 01:54:52,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:54:52,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:52,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:54:52,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1174 proven. 0 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2022-11-03 01:54:52,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:52,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [388599714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:52,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:54:52,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 10] total 18 [2022-11-03 01:54:52,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377218878] [2022-11-03 01:54:52,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:52,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:54:52,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:54:52,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:54:52,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:54:52,343 INFO L87 Difference]: Start difference. First operand 27948 states and 34738 transitions. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:53,132 INFO L93 Difference]: Finished difference Result 68859 states and 85483 transitions. [2022-11-03 01:54:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:54:53,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 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 605 [2022-11-03 01:54:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:53,160 INFO L225 Difference]: With dead ends: 68859 [2022-11-03 01:54:53,160 INFO L226 Difference]: Without dead ends: 41455 [2022-11-03 01:54:53,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1818 GetRequests, 1798 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:54:53,173 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 322 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:53,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 567 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:54:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41455 states. [2022-11-03 01:54:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41455 to 27864. [2022-11-03 01:54:53,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27864 states, 27863 states have (on average 1.236406704231418) internal successors, (34450), 27863 states have internal predecessors, (34450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27864 states to 27864 states and 34450 transitions. [2022-11-03 01:54:54,017 INFO L78 Accepts]: Start accepts. Automaton has 27864 states and 34450 transitions. Word has length 605 [2022-11-03 01:54:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:54,017 INFO L495 AbstractCegarLoop]: Abstraction has 27864 states and 34450 transitions. [2022-11-03 01:54:54,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:54:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 27864 states and 34450 transitions. [2022-11-03 01:54:54,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2022-11-03 01:54:54,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:54,034 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:54,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-03 01:54:54,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2022-11-03 01:54:54,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:54:54,435 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:54,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1860120739, now seen corresponding path program 3 times [2022-11-03 01:54:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:54:54,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39073120] [2022-11-03 01:54:54,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:54:54,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:54:54,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:54:54,439 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:54:54,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-03 01:54:54,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:54:54,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:54,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:54:54,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2022-11-03 01:55:00,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2022-11-03 01:55:09,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:09,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39073120] [2022-11-03 01:55:09,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39073120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:09,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [657050900] [2022-11-03 01:55:09,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:55:09,325 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:09,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:09,326 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:09,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2022-11-03 01:55:10,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:55:10,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:10,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:55:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2022-11-03 01:55:15,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2022-11-03 01:55:23,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [657050900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:23,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945218934] [2022-11-03 01:55:23,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:55:23,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:23,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:23,856 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:23,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-11-03 01:55:24,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:55:24,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:55:24,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:55:24,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2022-11-03 01:55:29,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2022-11-03 01:55:37,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945218934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:37,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:55:37,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2022-11-03 01:55:37,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024180282] [2022-11-03 01:55:37,742 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:37,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 01:55:37,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 01:55:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:55:37,744 INFO L87 Difference]: Start difference. First operand 27864 states and 34450 transitions. Second operand has 22 states, 22 states have (on average 13.545454545454545) internal successors, (298), 22 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:41,178 INFO L93 Difference]: Finished difference Result 83578 states and 106022 transitions. [2022-11-03 01:55:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 01:55:41,179 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 13.545454545454545) internal successors, (298), 22 states have internal predecessors, (298), 0 states have call successors, (0), 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 605 [2022-11-03 01:55:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:41,234 INFO L225 Difference]: With dead ends: 83578 [2022-11-03 01:55:41,234 INFO L226 Difference]: Without dead ends: 83576 [2022-11-03 01:55:41,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3657 GetRequests, 3602 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=627, Invalid=2343, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 01:55:41,242 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 1164 mSDsluCounter, 3056 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 3299 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 714 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:41,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 3299 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 494 Invalid, 0 Unknown, 714 Unchecked, 0.6s Time] [2022-11-03 01:55:41,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83576 states. [2022-11-03 01:55:42,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83576 to 33672. [2022-11-03 01:55:42,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33672 states, 33671 states have (on average 1.2473048023521724) internal successors, (41998), 33671 states have internal predecessors, (41998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33672 states to 33672 states and 41998 transitions. [2022-11-03 01:55:42,416 INFO L78 Accepts]: Start accepts. Automaton has 33672 states and 41998 transitions. Word has length 605 [2022-11-03 01:55:42,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:42,416 INFO L495 AbstractCegarLoop]: Abstraction has 33672 states and 41998 transitions. [2022-11-03 01:55:42,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 13.545454545454545) internal successors, (298), 22 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:42,417 INFO L276 IsEmpty]: Start isEmpty. Operand 33672 states and 41998 transitions. [2022-11-03 01:55:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2022-11-03 01:55:42,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:42,438 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:42,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:42,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:42,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (103)] Ended with exit code 0 [2022-11-03 01:55:43,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:43,055 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:43,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:43,055 INFO L85 PathProgramCache]: Analyzing trace with hash 406260447, now seen corresponding path program 1 times [2022-11-03 01:55:43,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:43,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001321800] [2022-11-03 01:55:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:43,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:43,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:43,058 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:43,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-03 01:55:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:55:44,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1008 proven. 77 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2022-11-03 01:55:44,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1082 proven. 3 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2022-11-03 01:55:45,219 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:45,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001321800] [2022-11-03 01:55:45,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001321800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:45,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [285846499] [2022-11-03 01:55:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:45,220 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:45,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:45,221 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:45,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2022-11-03 01:55:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:46,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:55:46,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 1736 trivial. 0 not checked. [2022-11-03 01:55:46,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:55:46,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [285846499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:46,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:55:46,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 10] total 18 [2022-11-03 01:55:46,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243703736] [2022-11-03 01:55:46,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:46,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:55:46,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:46,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:55:46,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:55:46,629 INFO L87 Difference]: Start difference. First operand 33672 states and 41998 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:47,458 INFO L93 Difference]: Finished difference Result 56794 states and 71407 transitions. [2022-11-03 01:55:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:55:47,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 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 605 [2022-11-03 01:55:47,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:47,482 INFO L225 Difference]: With dead ends: 56794 [2022-11-03 01:55:47,482 INFO L226 Difference]: Without dead ends: 31784 [2022-11-03 01:55:47,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1818 GetRequests, 1798 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:55:47,496 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 269 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:47,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 473 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:55:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31784 states. [2022-11-03 01:55:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31784 to 29888. [2022-11-03 01:55:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29888 states, 29887 states have (on average 1.2384648843978987) internal successors, (37014), 29887 states have internal predecessors, (37014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29888 states to 29888 states and 37014 transitions. [2022-11-03 01:55:48,410 INFO L78 Accepts]: Start accepts. Automaton has 29888 states and 37014 transitions. Word has length 605 [2022-11-03 01:55:48,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:48,410 INFO L495 AbstractCegarLoop]: Abstraction has 29888 states and 37014 transitions. [2022-11-03 01:55:48,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 29888 states and 37014 transitions. [2022-11-03 01:55:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2022-11-03 01:55:48,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:48,461 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 01:55:48,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:48,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (106)] Ended with exit code 0 [2022-11-03 01:55:48,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:48,879 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:48,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2019196627, now seen corresponding path program 1 times [2022-11-03 01:55:48,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:55:48,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902730762] [2022-11-03 01:55:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:48,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:55:48,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:55:48,883 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:55:48,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 01:55:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:49,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 3048 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:55:49,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 1192 proven. 77 refuted. 0 times theorem prover too weak. 1449 trivial. 0 not checked. [2022-11-03 01:55:50,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 1266 proven. 3 refuted. 0 times theorem prover too weak. 1449 trivial. 0 not checked. [2022-11-03 01:55:50,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:55:50,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902730762] [2022-11-03 01:55:50,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902730762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:50,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [331308763] [2022-11-03 01:55:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:50,964 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:55:50,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:55:50,965 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:55:50,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2022-11-03 01:55:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:53,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 3048 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:55:53,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 1192 proven. 77 refuted. 0 times theorem prover too weak. 1449 trivial. 0 not checked. [2022-11-03 01:55:53,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 1266 proven. 3 refuted. 0 times theorem prover too weak. 1449 trivial. 0 not checked. [2022-11-03 01:55:54,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [331308763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:54,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429971052] [2022-11-03 01:55:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:54,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:54,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:55:54,192 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:55:54,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-03 01:55:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 3048 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:55:55,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:55:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 802 proven. 524 refuted. 0 times theorem prover too weak. 1392 trivial. 0 not checked. [2022-11-03 01:55:57,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2718 backedges. 802 proven. 524 refuted. 0 times theorem prover too weak. 1392 trivial. 0 not checked. [2022-11-03 01:55:59,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429971052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:59,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:55:59,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 12, 12] total 35 [2022-11-03 01:55:59,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416379598] [2022-11-03 01:55:59,563 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:59,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 01:55:59,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:55:59,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 01:55:59,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1104, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 01:55:59,565 INFO L87 Difference]: Start difference. First operand 29888 states and 37014 transitions. Second operand has 35 states, 35 states have (on average 18.914285714285715) internal successors, (662), 35 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:00,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:00,547 INFO L93 Difference]: Finished difference Result 30432 states and 37615 transitions. [2022-11-03 01:56:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:56:00,548 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 18.914285714285715) internal successors, (662), 35 states have internal predecessors, (662), 0 states have call successors, (0), 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 680 [2022-11-03 01:56:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:00,549 INFO L225 Difference]: With dead ends: 30432 [2022-11-03 01:56:00,549 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 01:56:00,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4081 GetRequests, 4039 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 01:56:00,557 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 783 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:00,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 2314 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:56:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 01:56:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 01:56:00,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 01:56:00,559 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 680 [2022-11-03 01:56:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:00,559 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 01:56:00,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 18.914285714285715) internal successors, (662), 35 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 01:56:00,560 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 01:56:00,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:56:00,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-03 01:56:00,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-11-03 01:56:00,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:01,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:56:01,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-03 02:00:39,125 WARN L234 SmtUtils]: Spent 4.63m on a formula simplification. DAG size of input: 313 DAG size of output: 310 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-11-03 02:00:43,523 INFO L899 garLoopResultBuilder]: For program point L267(line 267) no Hoare annotation was computed. [2022-11-03 02:00:43,524 INFO L899 garLoopResultBuilder]: For program point L201(line 201) no Hoare annotation was computed. [2022-11-03 02:00:43,524 INFO L899 garLoopResultBuilder]: For program point L267-2(line 267) no Hoare annotation was computed. [2022-11-03 02:00:43,524 INFO L899 garLoopResultBuilder]: For program point L201-2(line 201) no Hoare annotation was computed. [2022-11-03 02:00:43,524 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-03 02:00:43,524 INFO L899 garLoopResultBuilder]: For program point L284(line 284) no Hoare annotation was computed. [2022-11-03 02:00:43,526 INFO L899 garLoopResultBuilder]: For program point L284-2(line 284) no Hoare annotation was computed. [2022-11-03 02:00:43,526 INFO L899 garLoopResultBuilder]: For program point L185(line 185) no Hoare annotation was computed. [2022-11-03 02:00:43,526 INFO L899 garLoopResultBuilder]: For program point L185-2(line 185) no Hoare annotation was computed. [2022-11-03 02:00:43,527 INFO L899 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2022-11-03 02:00:43,527 INFO L899 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2022-11-03 02:00:43,527 INFO L899 garLoopResultBuilder]: For program point L20-3(line 20) no Hoare annotation was computed. [2022-11-03 02:00:43,527 INFO L899 garLoopResultBuilder]: For program point L367(line 367) no Hoare annotation was computed. [2022-11-03 02:00:43,527 INFO L899 garLoopResultBuilder]: For program point L334(line 334) no Hoare annotation was computed. [2022-11-03 02:00:43,527 INFO L899 garLoopResultBuilder]: For program point L301(line 301) no Hoare annotation was computed. [2022-11-03 02:00:43,528 INFO L899 garLoopResultBuilder]: For program point L367-2(line 367) no Hoare annotation was computed. [2022-11-03 02:00:43,528 INFO L899 garLoopResultBuilder]: For program point L334-2(line 334) no Hoare annotation was computed. [2022-11-03 02:00:43,528 INFO L899 garLoopResultBuilder]: For program point L301-2(line 301) no Hoare annotation was computed. [2022-11-03 02:00:43,529 INFO L899 garLoopResultBuilder]: For program point L318(line 318) no Hoare annotation was computed. [2022-11-03 02:00:43,529 INFO L899 garLoopResultBuilder]: For program point L318-2(line 318) no Hoare annotation was computed. [2022-11-03 02:00:43,530 INFO L899 garLoopResultBuilder]: For program point L236(line 236) no Hoare annotation was computed. [2022-11-03 02:00:43,530 INFO L899 garLoopResultBuilder]: For program point L236-2(line 236) no Hoare annotation was computed. [2022-11-03 02:00:43,530 INFO L899 garLoopResultBuilder]: For program point L352(line 352) no Hoare annotation was computed. [2022-11-03 02:00:43,530 INFO L899 garLoopResultBuilder]: For program point L352-2(line 352) no Hoare annotation was computed. [2022-11-03 02:00:43,530 INFO L899 garLoopResultBuilder]: For program point L254(line 254) no Hoare annotation was computed. [2022-11-03 02:00:43,531 INFO L899 garLoopResultBuilder]: For program point L254-2(line 254) no Hoare annotation was computed. [2022-11-03 02:00:43,531 INFO L899 garLoopResultBuilder]: For program point L271(line 271) no Hoare annotation was computed. [2022-11-03 02:00:43,531 INFO L899 garLoopResultBuilder]: For program point L205(line 205) no Hoare annotation was computed. [2022-11-03 02:00:43,531 INFO L899 garLoopResultBuilder]: For program point L271-2(line 271) no Hoare annotation was computed. [2022-11-03 02:00:43,531 INFO L899 garLoopResultBuilder]: For program point L205-2(line 205) no Hoare annotation was computed. [2022-11-03 02:00:43,531 INFO L899 garLoopResultBuilder]: For program point L288(line 288) no Hoare annotation was computed. [2022-11-03 02:00:43,532 INFO L899 garLoopResultBuilder]: For program point L288-2(line 288) no Hoare annotation was computed. [2022-11-03 02:00:43,532 INFO L899 garLoopResultBuilder]: For program point L189(line 189) no Hoare annotation was computed. [2022-11-03 02:00:43,532 INFO L899 garLoopResultBuilder]: For program point L189-2(line 189) no Hoare annotation was computed. [2022-11-03 02:00:43,532 INFO L899 garLoopResultBuilder]: For program point L371(line 371) no Hoare annotation was computed. [2022-11-03 02:00:43,532 INFO L899 garLoopResultBuilder]: For program point L305(line 305) no Hoare annotation was computed. [2022-11-03 02:00:43,532 INFO L899 garLoopResultBuilder]: For program point L371-2(line 371) no Hoare annotation was computed. [2022-11-03 02:00:43,533 INFO L899 garLoopResultBuilder]: For program point L305-2(line 305) no Hoare annotation was computed. [2022-11-03 02:00:43,533 INFO L899 garLoopResultBuilder]: For program point L322(line 322) no Hoare annotation was computed. [2022-11-03 02:00:43,533 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-03 02:00:43,533 INFO L899 garLoopResultBuilder]: For program point L322-2(line 322) no Hoare annotation was computed. [2022-11-03 02:00:43,533 INFO L899 garLoopResultBuilder]: For program point L240(line 240) no Hoare annotation was computed. [2022-11-03 02:00:43,533 INFO L899 garLoopResultBuilder]: For program point L174(line 174) no Hoare annotation was computed. [2022-11-03 02:00:43,534 INFO L899 garLoopResultBuilder]: For program point L240-2(line 240) no Hoare annotation was computed. [2022-11-03 02:00:43,536 INFO L899 garLoopResultBuilder]: For program point L174-2(line 174) no Hoare annotation was computed. [2022-11-03 02:00:43,536 INFO L899 garLoopResultBuilder]: For program point L340(line 340) no Hoare annotation was computed. [2022-11-03 02:00:43,536 INFO L899 garLoopResultBuilder]: For program point L340-2(line 340) no Hoare annotation was computed. [2022-11-03 02:00:43,536 INFO L899 garLoopResultBuilder]: For program point L209(line 209) no Hoare annotation was computed. [2022-11-03 02:00:43,536 INFO L899 garLoopResultBuilder]: For program point L209-2(line 209) no Hoare annotation was computed. [2022-11-03 02:00:43,537 INFO L895 garLoopResultBuilder]: At program point L391(lines 22 392) the Hoare annotation is: false [2022-11-03 02:00:43,537 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-03 02:00:43,537 INFO L899 garLoopResultBuilder]: For program point L375(line 375) no Hoare annotation was computed. [2022-11-03 02:00:43,537 INFO L899 garLoopResultBuilder]: For program point L375-2(line 375) no Hoare annotation was computed. [2022-11-03 02:00:43,537 INFO L899 garLoopResultBuilder]: For program point L326(line 326) no Hoare annotation was computed. [2022-11-03 02:00:43,538 INFO L899 garLoopResultBuilder]: For program point L326-2(line 326) no Hoare annotation was computed. [2022-11-03 02:00:43,538 INFO L899 garLoopResultBuilder]: For program point L244(line 244) no Hoare annotation was computed. [2022-11-03 02:00:43,538 INFO L899 garLoopResultBuilder]: For program point L244-2(line 244) no Hoare annotation was computed. [2022-11-03 02:00:43,539 INFO L899 garLoopResultBuilder]: For program point L228(line 228) no Hoare annotation was computed. [2022-11-03 02:00:43,539 INFO L899 garLoopResultBuilder]: For program point L228-2(line 228) no Hoare annotation was computed. [2022-11-03 02:00:43,539 INFO L895 garLoopResultBuilder]: At program point L113-2(lines 113 390) the Hoare annotation is: (let ((.cse68 ((_ extract 7 0) ((_ zero_extend 24) |ULTIMATE.start_main_~var_7~0#1|)))) (let ((.cse66 ((_ extract 7 0) ((_ zero_extend 24) .cse68)))) (let ((.cse67 ((_ extract 7 0) (bvand ((_ zero_extend 24) ((_ extract 7 0) ((_ zero_extend 24) .cse66))) (_ bv1 32))))) (let ((.cse2 (= (_ bv0 8) |ULTIMATE.start_main_~state_26~0#1|)) (.cse14 (= |ULTIMATE.start_main_~var_74_arg_2~0#1| (_ bv0 8))) (.cse15 (= |ULTIMATE.start_main_~var_74~0#1| (_ bv0 8))) (.cse0 (= (_ bv1 8) |ULTIMATE.start_main_~var_22~0#1|)) (.cse16 (= |ULTIMATE.start_main_~var_148_arg_0~0#1| (_ bv0 8))) (.cse1 (= (_ bv1 8) |ULTIMATE.start_main_~mask_SORT_1~0#1|)) (.cse17 (= |ULTIMATE.start_main_~var_118_arg_0~0#1| (_ bv0 8))) (.cse18 (= |ULTIMATE.start_main_~next_137_arg_1~0#1| (_ bv0 8))) (.cse19 (= (_ bv1 8) |ULTIMATE.start_main_~var_112_arg_1~0#1|)) (.cse20 (= |ULTIMATE.start_main_~var_98_arg_0~0#1| (_ bv0 8))) (.cse21 (= |ULTIMATE.start_main_~var_136_arg_2~0#1| (_ bv0 8))) (.cse22 (= |ULTIMATE.start___VERIFIER_assert_~cond#1| (_ bv1 32))) (.cse23 (= |ULTIMATE.start_main_~var_114_arg_1~0#1| .cse68)) (.cse24 (= |ULTIMATE.start_main_~var_101_arg_2~0#1| (_ bv0 8))) (.cse25 (= (_ bv1 8) |ULTIMATE.start_main_~var_108_arg_0~0#1|)) (.cse26 (= (_ bv0 8) |ULTIMATE.start_main_~var_100_arg_0~0#1|)) (.cse27 (= |ULTIMATE.start_main_~next_88_arg_1~0#1| (_ bv0 8))) (.cse28 (= .cse67 |ULTIMATE.start_main_~state_43~0#1|)) (.cse29 (= |ULTIMATE.start_main_~var_147_arg_0~0#1| (_ bv0 8))) (.cse30 (= |ULTIMATE.start_main_~next_102_arg_1~0#1| (_ bv0 8))) (.cse31 (= (_ bv0 8) |ULTIMATE.start_main_~next_135_arg_1~0#1|)) (.cse32 (= |ULTIMATE.start_main_~var_109_arg_2~0#1| (_ bv0 8))) (.cse3 (= (_ bv0 8) |ULTIMATE.start_main_~state_64~0#1|)) (.cse33 (= (_ bv1 8) |ULTIMATE.start_main_~var_107~0#1|)) (.cse34 (= |ULTIMATE.start_main_~var_129_arg_0~0#1| (_ bv0 8))) (.cse35 (= (_ bv1 8) |ULTIMATE.start_main_~var_113~0#1|)) (.cse4 (= |ULTIMATE.start_main_~state_8~0#1| (_ bv0 8))) (.cse36 (= |ULTIMATE.start_main_~var_138_arg_2~0#1| (_ bv0 8))) (.cse37 (= |ULTIMATE.start_main_~var_134_arg_2~0#1| (_ bv0 8))) (.cse38 (= (_ bv1 8) |ULTIMATE.start_main_~var_106_arg_1~0#1|)) (.cse39 (= |ULTIMATE.start_main_~var_128_arg_0~0#1| (_ bv0 8))) (.cse40 (= |ULTIMATE.start_main_~var_97_arg_0~0#1| |ULTIMATE.start_main_~var_96~0#1|)) (.cse41 (= |ULTIMATE.start_main_~next_116_arg_1~0#1| .cse67)) (.cse42 (= (_ bv0 8) |ULTIMATE.start_main_~var_100_arg_1~0#1|)) (.cse5 (= |ULTIMATE.start_main_~var_7~0#1| (_ bv0 8))) (.cse43 (= |ULTIMATE.start_main_~var_112_arg_0~0#1| (_ bv0 8))) (.cse44 (= |ULTIMATE.start_main_~var_136_arg_1~0#1| (_ bv0 8))) (.cse45 (= |ULTIMATE.start_main_~var_103_arg_1~0#1| (_ bv0 8))) (.cse46 (= |ULTIMATE.start_main_~var_130_arg_0~0#1| (_ bv0 8))) (.cse47 (= (_ bv0 16) |ULTIMATE.start_main_~var_148_arg_2~0#1|)) (.cse6 (= (_ bv0 8) |ULTIMATE.start_main_~state_28~0#1|)) (.cse48 (= |ULTIMATE.start_main_~var_99_arg_0~0#1| (_ bv0 8))) (.cse49 (= |ULTIMATE.start_main_~var_106_arg_0~0#1| (_ bv0 8))) (.cse7 (= (_ bv104 32) |ULTIMATE.start_main_~var_95~0#1|)) (.cse50 (= |ULTIMATE.start_main_~var_109_arg_0~0#1| (_ bv0 8))) (.cse51 (= |ULTIMATE.start_main_~var_132_arg_0~0#1| (_ bv0 8))) (.cse52 (= |ULTIMATE.start_main_~var_131_arg_0~0#1| (_ bv0 8))) (.cse53 (= |ULTIMATE.start_main_~var_101_arg_0~0#1| (_ bv0 8))) (.cse54 (= |ULTIMATE.start_main_~var_106_arg_2~0#1| (_ bv0 8))) (.cse8 (= (_ bv0 8) |ULTIMATE.start_main_~state_62~0#1|)) (.cse55 (= |ULTIMATE.start_main_~var_87_arg_0~0#1| (_ bv0 8))) (.cse9 (= (_ bv0 8) |ULTIMATE.start_main_~state_15~0#1|)) (.cse56 (= |ULTIMATE.start_main_~var_114_arg_0~0#1| (_ bv1 8))) (.cse10 (= (_ bv0 8) |ULTIMATE.start_main_~state_60~0#1|)) (.cse57 (= .cse66 |ULTIMATE.start_main_~var_115_arg_2~0#1|)) (.cse58 (= (_ bv0 8) |ULTIMATE.start_main_~var_86_arg_0~0#1|)) (.cse59 (= |ULTIMATE.start_main_~next_139_arg_1~0#1| (_ bv0 8))) (.cse60 (= |ULTIMATE.start_main_~var_87_arg_2~0#1| (_ bv0 8))) (.cse11 (= (_ bv1023 16) |ULTIMATE.start_main_~mask_SORT_70~0#1|)) (.cse61 (= |ULTIMATE.start_main_~var_112_arg_2~0#1| |ULTIMATE.start_main_~var_7~0#1|)) (.cse12 (= (_ bv0 16) |ULTIMATE.start_main_~state_72~0#1|)) (.cse62 (= |ULTIMATE.start_main_~var_96~0#1| (_ bv0 8))) (.cse63 (= |ULTIMATE.start_main_~next_110_arg_1~0#1| (_ bv0 8))) (.cse64 (= |ULTIMATE.start_main_~state_43~0#1| |ULTIMATE.start_main_~var_115_arg_0~0#1|)) (.cse13 (= |ULTIMATE.start_main_~var_12~0#1| (_ bv0 32))) (.cse65 (= |ULTIMATE.start_main_~var_108_arg_1~0#1| (_ bv0 8)))) (or (and .cse0 .cse1 (= (_ bv0 8) |ULTIMATE.start_main_~state_45~0#1|) .cse2 .cse3 .cse4 .cse5 .cse6 (= (_ bv0 8) |ULTIMATE.start_main_~state_68~0#1|) .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 (= ((_ zero_extend 24) |ULTIMATE.start_main_~state_43~0#1|) (_ bv0 32))) (and .cse14 .cse15 .cse0 (= |ULTIMATE.start_main_~next_104_arg_1~0#1| (_ bv0 8)) .cse16 .cse1 .cse17 .cse18 .cse19 .cse20 .cse21 .cse22 .cse23 .cse24 .cse25 .cse2 .cse26 .cse27 .cse28 .cse29 .cse30 .cse31 .cse32 .cse3 .cse33 .cse34 .cse35 .cse4 .cse36 .cse37 .cse38 .cse39 .cse40 .cse41 .cse42 .cse5 .cse43 .cse44 .cse45 .cse46 .cse47 .cse6 .cse48 .cse49 .cse7 .cse50 .cse51 .cse52 .cse53 .cse54 .cse8 .cse55 .cse9 .cse56 .cse10 .cse57 .cse58 .cse59 .cse60 .cse11 .cse61 .cse12 .cse62 .cse63 .cse64 .cse13 .cse65) (and .cse14 .cse15 .cse0 .cse16 .cse1 .cse17 .cse18 .cse19 .cse20 .cse21 .cse22 .cse23 .cse24 .cse25 .cse26 .cse27 .cse28 .cse29 .cse30 .cse31 .cse32 .cse3 .cse33 .cse34 .cse35 .cse4 .cse36 .cse37 .cse38 .cse39 .cse40 .cse41 .cse42 .cse5 .cse43 (= |ULTIMATE.start_main_~var_136_arg_0~0#1| (_ bv0 8)) .cse44 .cse45 .cse46 .cse47 .cse6 .cse48 .cse49 .cse7 .cse50 .cse51 .cse52 .cse53 .cse54 .cse8 .cse55 .cse9 .cse56 .cse10 (= |ULTIMATE.start_main_~var_103_arg_0~0#1| (_ bv0 8)) .cse57 .cse58 .cse59 .cse60 .cse11 .cse61 .cse12 .cse62 .cse63 .cse64 .cse13 .cse65)))))) [2022-11-03 02:00:43,540 INFO L899 garLoopResultBuilder]: For program point L113-3(lines 113 390) no Hoare annotation was computed. [2022-11-03 02:00:43,540 INFO L899 garLoopResultBuilder]: For program point L213(line 213) no Hoare annotation was computed. [2022-11-03 02:00:43,540 INFO L899 garLoopResultBuilder]: For program point L213-2(line 213) no Hoare annotation was computed. [2022-11-03 02:00:43,540 INFO L899 garLoopResultBuilder]: For program point L263(line 263) no Hoare annotation was computed. [2022-11-03 02:00:43,540 INFO L899 garLoopResultBuilder]: For program point L263-2(line 263) no Hoare annotation was computed. [2022-11-03 02:00:43,541 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-03 02:00:43,541 INFO L899 garLoopResultBuilder]: For program point L346(line 346) no Hoare annotation was computed. [2022-11-03 02:00:43,541 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2022-11-03 02:00:43,542 INFO L899 garLoopResultBuilder]: For program point L280(line 280) no Hoare annotation was computed. [2022-11-03 02:00:43,542 INFO L899 garLoopResultBuilder]: For program point L346-2(line 346) no Hoare annotation was computed. [2022-11-03 02:00:43,544 INFO L899 garLoopResultBuilder]: For program point L280-2(line 280) no Hoare annotation was computed. [2022-11-03 02:00:43,544 INFO L899 garLoopResultBuilder]: For program point L181(line 181) no Hoare annotation was computed. [2022-11-03 02:00:43,544 INFO L899 garLoopResultBuilder]: For program point L181-2(line 181) no Hoare annotation was computed. [2022-11-03 02:00:43,544 INFO L899 garLoopResultBuilder]: For program point L330(line 330) no Hoare annotation was computed. [2022-11-03 02:00:43,544 INFO L899 garLoopResultBuilder]: For program point L297(line 297) no Hoare annotation was computed. [2022-11-03 02:00:43,545 INFO L899 garLoopResultBuilder]: For program point L330-2(line 330) no Hoare annotation was computed. [2022-11-03 02:00:43,545 INFO L899 garLoopResultBuilder]: For program point L297-2(line 297) no Hoare annotation was computed. [2022-11-03 02:00:43,545 INFO L899 garLoopResultBuilder]: For program point L314(line 314) no Hoare annotation was computed. [2022-11-03 02:00:43,545 INFO L899 garLoopResultBuilder]: For program point L248(line 248) no Hoare annotation was computed. [2022-11-03 02:00:43,545 INFO L899 garLoopResultBuilder]: For program point L314-2(line 314) no Hoare annotation was computed. [2022-11-03 02:00:43,545 INFO L899 garLoopResultBuilder]: For program point L248-2(line 248) no Hoare annotation was computed. [2022-11-03 02:00:43,547 INFO L899 garLoopResultBuilder]: For program point L232(line 232) no Hoare annotation was computed. [2022-11-03 02:00:43,547 INFO L899 garLoopResultBuilder]: For program point L232-2(line 232) no Hoare annotation was computed. [2022-11-03 02:00:43,552 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:43,557 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:00:43,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:00:43 BoogieIcfgContainer [2022-11-03 02:00:43,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:00:43,583 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:00:43,583 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:00:43,583 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:00:43,584 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:52:05" (3/4) ... [2022-11-03 02:00:43,588 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-03 02:00:43,607 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-03 02:00:43,608 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-03 02:00:43,609 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-03 02:00:43,712 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.witnessprinter has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromIASTNode(CACSLBacktranslationValueProvider.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromStep(CACSLBacktranslationValueProvider.java:59) at de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromStep(CACSLBacktranslationValueProvider.java:1) at de.uni_freiburg.informatik.ultimate.witnessprinter.graphml.GeneratedWitnessEdge.getSourceCode(GeneratedWitnessEdge.java:153) at de.uni_freiburg.informatik.ultimate.witnessprinter.CorrectnessWitnessGenerator.lambda$2(CorrectnessWitnessGenerator.java:95) at edu.uci.ics.jung.io.GraphMLWriter.writeEdgeData(GraphMLWriter.java:237) at de.uni_freiburg.informatik.ultimate.witnessprinter.graphml.UltimateGraphMLWriter.save(UltimateGraphMLWriter.java:106) at de.uni_freiburg.informatik.ultimate.witnessprinter.CorrectnessWitnessGenerator.makeGraphMLString(CorrectnessWitnessGenerator.java:115) at de.uni_freiburg.informatik.ultimate.witnessprinter.WitnessPrinter.generateProofWitness(WitnessPrinter.java:158) at de.uni_freiburg.informatik.ultimate.witnessprinter.WitnessPrinter.finish(WitnessPrinter.java:138) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:131) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$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) [2022-11-03 02:00:43,716 INFO L158 Benchmark]: Toolchain (without parser) took 520186.18ms. Allocated memory was 81.8MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 66.8MB in the beginning and 2.0GB in the end (delta: -1.9GB). Peak memory consumption was 233.2MB. Max. memory is 16.1GB. [2022-11-03 02:00:43,716 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 81.8MB. Free memory is still 63.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:00:43,717 INFO L158 Benchmark]: CACSL2BoogieTranslator took 531.59ms. Allocated memory is still 81.8MB. Free memory was 66.5MB in the beginning and 60.5MB in the end (delta: 6.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 02:00:43,717 INFO L158 Benchmark]: Boogie Procedure Inliner took 126.71ms. Allocated memory is still 81.8MB. Free memory was 60.5MB in the beginning and 56.6MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:00:43,720 INFO L158 Benchmark]: Boogie Preprocessor took 97.37ms. Allocated memory is still 81.8MB. Free memory was 56.6MB in the beginning and 53.7MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:00:43,720 INFO L158 Benchmark]: RCFGBuilder took 1086.83ms. Allocated memory is still 81.8MB. Free memory was 53.7MB in the beginning and 45.4MB in the end (delta: 8.3MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2022-11-03 02:00:43,722 INFO L158 Benchmark]: TraceAbstraction took 518203.64ms. Allocated memory was 81.8MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 45.0MB in the beginning and 2.0GB in the end (delta: -2.0GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2022-11-03 02:00:43,722 INFO L158 Benchmark]: Witness Printer took 132.58ms. Allocated memory is still 2.3GB. Free memory was 2.0GB in the beginning and 2.0GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:00:43,723 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 81.8MB. Free memory is still 63.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 531.59ms. Allocated memory is still 81.8MB. Free memory was 66.5MB in the beginning and 60.5MB in the end (delta: 6.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 126.71ms. Allocated memory is still 81.8MB. Free memory was 60.5MB in the beginning and 56.6MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 97.37ms. Allocated memory is still 81.8MB. Free memory was 56.6MB in the beginning and 53.7MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1086.83ms. Allocated memory is still 81.8MB. Free memory was 53.7MB in the beginning and 45.4MB in the end (delta: 8.3MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. * TraceAbstraction took 518203.64ms. Allocated memory was 81.8MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 45.0MB in the beginning and 2.0GB in the end (delta: -2.0GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. * Witness Printer took 132.58ms. Allocated memory is still 2.3GB. Free memory was 2.0GB in the beginning and 2.0GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 20]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 518.1s, OverallIterations: 62, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.3s, AutomataDifference: 52.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 282.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 49333 SdHoareTripleChecker+Valid, 16.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 49333 mSDsluCounter, 79794 SdHoareTripleChecker+Invalid, 14.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 992 IncrementalHoareTripleChecker+Unchecked, 69246 mSDsCounter, 1193 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15370 IncrementalHoareTripleChecker+Invalid, 17555 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1193 mSolverCounterUnsat, 10548 mSDtfsCounter, 15370 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 37745 GetRequests, 36386 SyntacticMatches, 24 SemanticMatches, 1335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37758 ImplicationChecksByTransitivity, 35.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33672occurred in iteration=60, InterpolantAutomatonStates: 981, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 9.2s AutomataMinimizationTime, 62 MinimizatonAttempts, 347615 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 15 NumberOfFragments, 511 HoareAnnotationTreeSize, 2 FomulaSimplifications, 1896964 FormulaSimplificationTreeSizeReduction, 278.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 2310176 FormulaSimplificationTreeSizeReductionInter, 4.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 12.7s SsaConstructionTime, 24.0s SatisfiabilityAnalysisTime, 104.5s InterpolantComputationTime, 21690 NumberOfCodeBlocks, 20115 NumberOfCodeBlocksAsserted, 113 NumberOfCheckSat, 36968 ConstructedInterpolants, 2484 QuantifiedInterpolants, 291661 SizeOfPredicates, 874 NumberOfNonLiveVariables, 95976 ConjunctsInSsa, 1164 ConjunctsInUnsatCore, 167 InterpolantComputations, 49 PerfectInterpolantSequences, 65596/71618 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 113]: Loop Invariant Derived loop invariant: (((((((((((((((((1bv8 == var_22 && 1bv8 == mask_SORT_1) && 0bv8 == state_45) && 0bv8 == state_26) && 0bv8 == state_64) && state_8 == 0bv8) && var_7 == 0bv8) && 0bv8 == state_28) && 0bv8 == state_68) && 104bv32 == var_95) && 0bv8 == state_62) && 0bv8 == state_15) && 0bv8 == state_60) && 1023bv16 == mask_SORT_70) && 0bv16 == state_72) && var_12 == 0bv32) && ~zero_extendFrom16To32(state_43) == 0bv32) || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((var_74_arg_2 == 0bv8 && var_74 == 0bv8) && 1bv8 == var_22) && next_104_arg_1 == 0bv8) && var_148_arg_0 == 0bv8) && 1bv8 == mask_SORT_1) && var_118_arg_0 == 0bv8) && next_137_arg_1 == 0bv8) && 1bv8 == var_112_arg_1) && var_98_arg_0 == 0bv8) && var_136_arg_2 == 0bv8) && cond == 1bv32) && var_114_arg_1 == ~zero_extendFrom16To32(var_7)[7:0]) && var_101_arg_2 == 0bv8) && 1bv8 == var_108_arg_0) && 0bv8 == state_26) && 0bv8 == var_100_arg_0) && next_88_arg_1 == 0bv8) && ~bvand32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_7)[7:0])[7:0])[7:0]), 1bv32)[7:0] == state_43) && var_147_arg_0 == 0bv8) && next_102_arg_1 == 0bv8) && 0bv8 == next_135_arg_1) && var_109_arg_2 == 0bv8) && 0bv8 == state_64) && 1bv8 == var_107) && var_129_arg_0 == 0bv8) && 1bv8 == var_113) && state_8 == 0bv8) && var_138_arg_2 == 0bv8) && var_134_arg_2 == 0bv8) && 1bv8 == var_106_arg_1) && var_128_arg_0 == 0bv8) && var_97_arg_0 == var_96) && next_116_arg_1 == ~bvand32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_7)[7:0])[7:0])[7:0]), 1bv32)[7:0]) && 0bv8 == var_100_arg_1) && var_7 == 0bv8) && var_112_arg_0 == 0bv8) && var_136_arg_1 == 0bv8) && var_103_arg_1 == 0bv8) && var_130_arg_0 == 0bv8) && 0bv16 == var_148_arg_2) && 0bv8 == state_28) && var_99_arg_0 == 0bv8) && var_106_arg_0 == 0bv8) && 104bv32 == var_95) && var_109_arg_0 == 0bv8) && var_132_arg_0 == 0bv8) && var_131_arg_0 == 0bv8) && var_101_arg_0 == 0bv8) && var_106_arg_2 == 0bv8) && 0bv8 == state_62) && var_87_arg_0 == 0bv8) && 0bv8 == state_15) && var_114_arg_0 == 1bv8) && 0bv8 == state_60) && ~zero_extendFrom16To32(~zero_extendFrom16To32(var_7)[7:0])[7:0] == var_115_arg_2) && 0bv8 == var_86_arg_0) && next_139_arg_1 == 0bv8) && var_87_arg_2 == 0bv8) && 1023bv16 == mask_SORT_70) && var_112_arg_2 == var_7) && 0bv16 == state_72) && var_96 == 0bv8) && next_110_arg_1 == 0bv8) && state_43 == var_115_arg_0) && var_12 == 0bv32) && var_108_arg_1 == 0bv8)) || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((var_74_arg_2 == 0bv8 && var_74 == 0bv8) && 1bv8 == var_22) && var_148_arg_0 == 0bv8) && 1bv8 == mask_SORT_1) && var_118_arg_0 == 0bv8) && next_137_arg_1 == 0bv8) && 1bv8 == var_112_arg_1) && var_98_arg_0 == 0bv8) && var_136_arg_2 == 0bv8) && cond == 1bv32) && var_114_arg_1 == ~zero_extendFrom16To32(var_7)[7:0]) && var_101_arg_2 == 0bv8) && 1bv8 == var_108_arg_0) && 0bv8 == var_100_arg_0) && next_88_arg_1 == 0bv8) && ~bvand32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_7)[7:0])[7:0])[7:0]), 1bv32)[7:0] == state_43) && var_147_arg_0 == 0bv8) && next_102_arg_1 == 0bv8) && 0bv8 == next_135_arg_1) && var_109_arg_2 == 0bv8) && 0bv8 == state_64) && 1bv8 == var_107) && var_129_arg_0 == 0bv8) && 1bv8 == var_113) && state_8 == 0bv8) && var_138_arg_2 == 0bv8) && var_134_arg_2 == 0bv8) && 1bv8 == var_106_arg_1) && var_128_arg_0 == 0bv8) && var_97_arg_0 == var_96) && next_116_arg_1 == ~bvand32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(~zero_extendFrom16To32(var_7)[7:0])[7:0])[7:0]), 1bv32)[7:0]) && 0bv8 == var_100_arg_1) && var_7 == 0bv8) && var_112_arg_0 == 0bv8) && var_136_arg_0 == 0bv8) && var_136_arg_1 == 0bv8) && var_103_arg_1 == 0bv8) && var_130_arg_0 == 0bv8) && 0bv16 == var_148_arg_2) && 0bv8 == state_28) && var_99_arg_0 == 0bv8) && var_106_arg_0 == 0bv8) && 104bv32 == var_95) && var_109_arg_0 == 0bv8) && var_132_arg_0 == 0bv8) && var_131_arg_0 == 0bv8) && var_101_arg_0 == 0bv8) && var_106_arg_2 == 0bv8) && 0bv8 == state_62) && var_87_arg_0 == 0bv8) && 0bv8 == state_15) && var_114_arg_0 == 1bv8) && 0bv8 == state_60) && var_103_arg_0 == 0bv8) && ~zero_extendFrom16To32(~zero_extendFrom16To32(var_7)[7:0])[7:0] == var_115_arg_2) && 0bv8 == var_86_arg_0) && next_139_arg_1 == 0bv8) && var_87_arg_2 == 0bv8) && 1023bv16 == mask_SORT_70) && var_112_arg_2 == var_7) && 0bv16 == state_72) && var_96 == 0bv8) && next_110_arg_1 == 0bv8) && state_43 == var_115_arg_0) && var_12 == 0bv32) && var_108_arg_1 == 0bv8) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 * Results from de.uni_freiburg.informatik.ultimate.witnessprinter: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.witnessprinter: NullPointerException: null: de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSLBacktranslationValueProvider.getStringFromIASTNode(CACSLBacktranslationValueProvider.java:78) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:00:43,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edd74750-0e3b-49f5-beb2-3cfee3791c29/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null