./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 461bd06f1b3f06d79cc4cf710543bc8daecc2e978ce52b7fb468042420cb9979 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:41:19,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:41:19,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:41:19,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:41:19,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:41:19,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:41:19,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:41:19,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:41:19,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:41:19,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:41:19,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:41:19,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:41:19,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:41:19,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:41:19,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:41:19,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:41:19,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:41:19,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:41:19,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:41:19,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:41:19,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:41:19,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:41:19,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:41:19,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:41:19,734 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:41:19,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:41:19,735 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:41:19,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:41:19,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:41:19,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:41:19,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:41:19,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:41:19,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:41:19,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:41:19,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:41:19,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:41:19,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:41:19,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:41:19,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:41:19,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:41:19,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:41:19,750 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:41:19,792 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:41:19,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:41:19,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:41:19,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:41:19,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:41:19,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:41:19,795 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:41:19,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:41:19,796 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:41:19,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:41:19,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:41:19,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:41:19,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:41:19,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:41:19,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:41:19,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:41:19,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:41:19,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:41:19,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:41:19,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:41:19,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:41:19,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:41:19,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:41:19,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:41:19,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:41:19,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:41:19,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:41:19,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:41:19,802 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:41:19,802 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:41:19,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:41:19,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:41:19,803 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_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 461bd06f1b3f06d79cc4cf710543bc8daecc2e978ce52b7fb468042420cb9979 [2021-11-02 22:41:20,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:41:20,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:41:20,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:41:20,127 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:41:20,128 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:41:20,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2021-11-02 22:41:20,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/data/6e716cfcb/ff57d5160b04445ea92e681ea9423f80/FLAG690c61ada [2021-11-02 22:41:20,693 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:41:20,694 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c [2021-11-02 22:41:20,704 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/data/6e716cfcb/ff57d5160b04445ea92e681ea9423f80/FLAG690c61ada [2021-11-02 22:41:21,053 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/data/6e716cfcb/ff57d5160b04445ea92e681ea9423f80 [2021-11-02 22:41:21,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:41:21,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:41:21,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:41:21,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:41:21,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:41:21,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:41:21" (1/1) ... [2021-11-02 22:41:21,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a21b469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21, skipping insertion in model container [2021-11-02 22:41:21,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:41:21" (1/1) ... [2021-11-02 22:41:21,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:41:21,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:41:21,270 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c[334,347] [2021-11-02 22:41:21,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:41:21,294 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:41:21,305 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/sv-benchmarks/c/array-programs/partial_mod_count_limited_base.c[334,347] [2021-11-02 22:41:21,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:41:21,327 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:41:21,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21 WrapperNode [2021-11-02 22:41:21,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:41:21,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:41:21,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:41:21,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:41:21,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21" (1/1) ... [2021-11-02 22:41:21,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21" (1/1) ... [2021-11-02 22:41:21,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:41:21,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:41:21,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:41:21,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:41:21,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21" (1/1) ... [2021-11-02 22:41:21,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21" (1/1) ... [2021-11-02 22:41:21,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21" (1/1) ... [2021-11-02 22:41:21,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21" (1/1) ... [2021-11-02 22:41:21,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21" (1/1) ... [2021-11-02 22:41:21,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21" (1/1) ... [2021-11-02 22:41:21,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21" (1/1) ... [2021-11-02 22:41:21,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:41:21,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:41:21,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:41:21,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:41:21,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21" (1/1) ... [2021-11-02 22:41:21,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:41:21,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:21,426 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:41:21,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:41:21,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:41:21,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:41:21,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:41:21,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:41:21,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:41:21,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:41:21,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:41:21,765 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:41:21,778 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-02 22:41:21,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:41:21 BoogieIcfgContainer [2021-11-02 22:41:21,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:41:21,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:41:21,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:41:21,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:41:21,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:41:21" (1/3) ... [2021-11-02 22:41:21,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc19c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:41:21, skipping insertion in model container [2021-11-02 22:41:21,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:21" (2/3) ... [2021-11-02 22:41:21,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc19c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:41:21, skipping insertion in model container [2021-11-02 22:41:21,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:41:21" (3/3) ... [2021-11-02 22:41:21,804 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_base.c [2021-11-02 22:41:21,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:41:21,809 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:41:21,901 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:41:21,908 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:41:21,908 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:41:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:41:21,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:21,929 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:21,930 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:21,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:21,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2021-11-02 22:41:21,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:21,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754596427] [2021-11-02 22:41:21,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:21,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:41:22,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:22,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754596427] [2021-11-02 22:41:22,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754596427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:22,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:22,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:41:22,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211950146] [2021-11-02 22:41:22,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:41:22,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:22,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:41:22,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:41:22,204 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:22,222 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-11-02 22:41:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:41:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-02 22:41:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:22,233 INFO L225 Difference]: With dead ends: 39 [2021-11-02 22:41:22,233 INFO L226 Difference]: Without dead ends: 17 [2021-11-02 22:41:22,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:41:22,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-02 22:41:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-02 22:41:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-02 22:41:22,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-11-02 22:41:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:22,273 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-02 22:41:22,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-02 22:41:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:41:22,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:22,277 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:22,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:41:22,278 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:22,281 INFO L85 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2021-11-02 22:41:22,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:22,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601582883] [2021-11-02 22:41:22,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:22,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:41:22,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:22,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601582883] [2021-11-02 22:41:22,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601582883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:22,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:22,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:41:22,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524126156] [2021-11-02 22:41:22,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:41:22,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:22,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:41:22,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:41:22,442 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:22,517 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-11-02 22:41:22,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:41:22,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-02 22:41:22,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:22,521 INFO L225 Difference]: With dead ends: 42 [2021-11-02 22:41:22,555 INFO L226 Difference]: Without dead ends: 29 [2021-11-02 22:41:22,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:41:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-02 22:41:22,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-11-02 22:41:22,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-02 22:41:22,576 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-11-02 22:41:22,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:22,577 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-02 22:41:22,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,578 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-02 22:41:22,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:41:22,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:22,579 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:22,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:41:22,580 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:22,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:22,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2021-11-02 22:41:22,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:22,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528605712] [2021-11-02 22:41:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:22,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:41:22,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:22,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528605712] [2021-11-02 22:41:22,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528605712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:22,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:22,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:41:22,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456492104] [2021-11-02 22:41:22,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:41:22,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:22,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:41:22,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:41:22,836 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:22,923 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-11-02 22:41:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:41:22,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-11-02 22:41:22,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:22,924 INFO L225 Difference]: With dead ends: 42 [2021-11-02 22:41:22,925 INFO L226 Difference]: Without dead ends: 29 [2021-11-02 22:41:22,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:41:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-02 22:41:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2021-11-02 22:41:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-02 22:41:22,942 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2021-11-02 22:41:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:22,943 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-02 22:41:22,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-02 22:41:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:41:22,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:22,944 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:22,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:41:22,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2129460565, now seen corresponding path program 1 times [2021-11-02 22:41:22,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:22,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427025660] [2021-11-02 22:41:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:22,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:41:23,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:23,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427025660] [2021-11-02 22:41:23,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427025660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:23,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:23,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:41:23,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201298900] [2021-11-02 22:41:23,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:41:23,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:23,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:41:23,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:41:23,014 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:23,045 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-11-02 22:41:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:41:23,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-11-02 22:41:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:23,048 INFO L225 Difference]: With dead ends: 32 [2021-11-02 22:41:23,048 INFO L226 Difference]: Without dead ends: 30 [2021-11-02 22:41:23,051 INFO L786 BasicCegarLoop]: 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 [2021-11-02 22:41:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-02 22:41:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-11-02 22:41:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-02 22:41:23,068 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2021-11-02 22:41:23,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:23,070 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-02 22:41:23,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:23,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-02 22:41:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:41:23,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:23,073 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:23,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:41:23,076 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:23,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:23,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2129520147, now seen corresponding path program 1 times [2021-11-02 22:41:23,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:23,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591137120] [2021-11-02 22:41:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:23,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:41:23,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:23,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591137120] [2021-11-02 22:41:23,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591137120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:23,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:23,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:41:23,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971052686] [2021-11-02 22:41:23,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:41:23,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:23,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:41:23,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:41:23,182 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:23,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:23,236 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-11-02 22:41:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:41:23,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-11-02 22:41:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:23,239 INFO L225 Difference]: With dead ends: 37 [2021-11-02 22:41:23,239 INFO L226 Difference]: Without dead ends: 35 [2021-11-02 22:41:23,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:41:23,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-02 22:41:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2021-11-02 22:41:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:23,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-02 22:41:23,254 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2021-11-02 22:41:23,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:23,255 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-02 22:41:23,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-02 22:41:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:41:23,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:23,258 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:23,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:41:23,258 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:23,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:23,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1393431485, now seen corresponding path program 1 times [2021-11-02 22:41:23,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:23,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540943817] [2021-11-02 22:41:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:23,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:23,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:23,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540943817] [2021-11-02 22:41:23,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540943817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:23,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118188497] [2021-11-02 22:41:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:23,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:23,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:23,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:23,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:41:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:23,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:41:23,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:23,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118188497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:23,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:23,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-02 22:41:23,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186938677] [2021-11-02 22:41:23,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:41:23,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:23,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:41:23,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:41:23,644 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:23,711 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-11-02 22:41:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:41:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 21 [2021-11-02 22:41:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:23,715 INFO L225 Difference]: With dead ends: 83 [2021-11-02 22:41:23,716 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 22:41:23,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:41:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 22:41:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2021-11-02 22:41:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-11-02 22:41:23,723 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2021-11-02 22:41:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:23,723 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-11-02 22:41:23,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-11-02 22:41:23,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:41:23,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:23,727 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:23,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:23,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 22:41:23,943 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:23,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:23,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1589095526, now seen corresponding path program 1 times [2021-11-02 22:41:23,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:23,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975137281] [2021-11-02 22:41:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:23,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:24,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:24,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975137281] [2021-11-02 22:41:24,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975137281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:24,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328634381] [2021-11-02 22:41:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:24,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:24,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:24,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:24,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:41:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:24,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:41:24,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:24,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328634381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:24,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:24,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-11-02 22:41:24,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408917102] [2021-11-02 22:41:24,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:41:24,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:24,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:41:24,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:41:24,312 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:24,524 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2021-11-02 22:41:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:41:24,526 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 22:41:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:24,527 INFO L225 Difference]: With dead ends: 108 [2021-11-02 22:41:24,528 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 22:41:24,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:41:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 22:41:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 39. [2021-11-02 22:41:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-02 22:41:24,534 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 26 [2021-11-02 22:41:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:24,538 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-02 22:41:24,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-02 22:41:24,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:41:24,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:24,539 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:24,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:24,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:24,756 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:24,757 INFO L85 PathProgramCache]: Analyzing trace with hash -442192347, now seen corresponding path program 2 times [2021-11-02 22:41:24,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:24,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266962281] [2021-11-02 22:41:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:24,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:41:24,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:24,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266962281] [2021-11-02 22:41:24,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266962281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:24,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082058687] [2021-11-02 22:41:24,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:41:24,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:24,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:24,931 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:24,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:41:25,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:41:25,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:41:25,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:25,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082058687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:25,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:25,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-02 22:41:25,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306909071] [2021-11-02 22:41:25,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:41:25,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:25,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:41:25,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:41:25,221 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:25,682 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2021-11-02 22:41:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:41:25,685 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 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 31 [2021-11-02 22:41:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:25,691 INFO L225 Difference]: With dead ends: 143 [2021-11-02 22:41:25,691 INFO L226 Difference]: Without dead ends: 120 [2021-11-02 22:41:25,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:41:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-02 22:41:25,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 56. [2021-11-02 22:41:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-02 22:41:25,699 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 31 [2021-11-02 22:41:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:25,700 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-02 22:41:25,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-02 22:41:25,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:41:25,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:25,701 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:25,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:25,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:25,902 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:25,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1071498680, now seen corresponding path program 2 times [2021-11-02 22:41:25,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:25,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722501564] [2021-11-02 22:41:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:25,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:26,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:26,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722501564] [2021-11-02 22:41:26,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722501564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:26,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957245889] [2021-11-02 22:41:26,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:41:26,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:26,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:26,019 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:26,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:41:26,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:41:26,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:26,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:41:26,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:26,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957245889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:26,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:26,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-02 22:41:26,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270425407] [2021-11-02 22:41:26,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:41:26,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:26,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:41:26,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:41:26,395 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:26,513 INFO L93 Difference]: Finished difference Result 207 states and 247 transitions. [2021-11-02 22:41:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:41:26,514 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 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 36 [2021-11-02 22:41:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:26,515 INFO L225 Difference]: With dead ends: 207 [2021-11-02 22:41:26,516 INFO L226 Difference]: Without dead ends: 164 [2021-11-02 22:41:26,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:41:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-02 22:41:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 56. [2021-11-02 22:41:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-02 22:41:26,526 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 36 [2021-11-02 22:41:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:26,526 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-02 22:41:26,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-02 22:41:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:41:26,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:26,528 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:26,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-02 22:41:26,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-02 22:41:26,748 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:26,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash 4107907, now seen corresponding path program 3 times [2021-11-02 22:41:26,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:26,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125959514] [2021-11-02 22:41:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:26,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:26,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:26,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125959514] [2021-11-02 22:41:26,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125959514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:26,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344596456] [2021-11-02 22:41:26,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:41:26,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:26,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:26,858 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:26,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:41:26,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:41:26,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:26,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:41:26,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-02 22:41:27,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344596456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:27,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:27,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-11-02 22:41:27,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345158035] [2021-11-02 22:41:27,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:41:27,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:27,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:41:27,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:41:27,246 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:27,840 INFO L93 Difference]: Finished difference Result 367 states and 435 transitions. [2021-11-02 22:41:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:41:27,841 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 22:41:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:27,842 INFO L225 Difference]: With dead ends: 367 [2021-11-02 22:41:27,843 INFO L226 Difference]: Without dead ends: 349 [2021-11-02 22:41:27,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:41:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-02 22:41:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 76. [2021-11-02 22:41:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 75 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2021-11-02 22:41:27,855 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 41 [2021-11-02 22:41:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:27,855 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2021-11-02 22:41:27,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2021-11-02 22:41:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:41:27,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:27,857 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:27,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:28,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:41:28,077 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:28,078 INFO L85 PathProgramCache]: Analyzing trace with hash 867646876, now seen corresponding path program 1 times [2021-11-02 22:41:28,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:28,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409638289] [2021-11-02 22:41:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:28,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:28,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:41:28,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009463142] [2021-11-02 22:41:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:28,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:28,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:28,102 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:28,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:41:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:28,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:41:28,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:28,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:28,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409638289] [2021-11-02 22:41:28,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:41:28,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009463142] [2021-11-02 22:41:28,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009463142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:28,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:41:28,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:41:28,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688011599] [2021-11-02 22:41:28,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:41:28,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:41:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:41:28,598 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:28,723 INFO L93 Difference]: Finished difference Result 302 states and 363 transitions. [2021-11-02 22:41:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:41:28,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 22:41:28,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:28,725 INFO L225 Difference]: With dead ends: 302 [2021-11-02 22:41:28,726 INFO L226 Difference]: Without dead ends: 252 [2021-11-02 22:41:28,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:41:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-02 22:41:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 86. [2021-11-02 22:41:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 85 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2021-11-02 22:41:28,736 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 46 [2021-11-02 22:41:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:28,737 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2021-11-02 22:41:28,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2021-11-02 22:41:28,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:41:28,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:28,739 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:28,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:28,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 22:41:28,963 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:28,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1544530789, now seen corresponding path program 3 times [2021-11-02 22:41:28,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:28,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815593334] [2021-11-02 22:41:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:28,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:41:29,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:29,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815593334] [2021-11-02 22:41:29,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815593334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:29,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258010848] [2021-11-02 22:41:29,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:41:29,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:29,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:29,118 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:29,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:41:29,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-02 22:41:29,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:29,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:41:29,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:41:29,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258010848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:29,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:29,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-02 22:41:29,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291169817] [2021-11-02 22:41:29,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:41:29,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:41:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:41:29,782 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:32,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:32,392 INFO L93 Difference]: Finished difference Result 366 states and 450 transitions. [2021-11-02 22:41:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-02 22:41:32,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 22:41:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:32,395 INFO L225 Difference]: With dead ends: 366 [2021-11-02 22:41:32,395 INFO L226 Difference]: Without dead ends: 348 [2021-11-02 22:41:32,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1648, Invalid=4514, Unknown=0, NotChecked=0, Total=6162 [2021-11-02 22:41:32,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-02 22:41:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 123. [2021-11-02 22:41:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2622950819672132) internal successors, (154), 122 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 154 transitions. [2021-11-02 22:41:32,426 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 154 transitions. Word has length 51 [2021-11-02 22:41:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:32,427 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 154 transitions. [2021-11-02 22:41:32,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 154 transitions. [2021-11-02 22:41:32,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:41:32,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:32,432 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:32,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:32,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 22:41:32,647 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:32,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:32,647 INFO L85 PathProgramCache]: Analyzing trace with hash 76873861, now seen corresponding path program 2 times [2021-11-02 22:41:32,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:32,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746527594] [2021-11-02 22:41:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:32,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:32,658 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:41:32,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342769502] [2021-11-02 22:41:32,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:41:32,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:32,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:32,660 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:32,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:41:32,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:41:32,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:32,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:41:32,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-02 22:41:33,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:33,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746527594] [2021-11-02 22:41:33,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:41:33,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342769502] [2021-11-02 22:41:33,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342769502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:33,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:33,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:41:33,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226993337] [2021-11-02 22:41:33,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:41:33,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:33,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:41:33,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:41:33,030 INFO L87 Difference]: Start difference. First operand 123 states and 154 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:33,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:33,056 INFO L93 Difference]: Finished difference Result 228 states and 289 transitions. [2021-11-02 22:41:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:41:33,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 61 [2021-11-02 22:41:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:33,060 INFO L225 Difference]: With dead ends: 228 [2021-11-02 22:41:33,060 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 22:41:33,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:41:33,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 22:41:33,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2021-11-02 22:41:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.236842105263158) internal successors, (141), 114 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) [2021-11-02 22:41:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2021-11-02 22:41:33,096 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 61 [2021-11-02 22:41:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:33,097 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2021-11-02 22:41:33,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2021-11-02 22:41:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:41:33,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:33,100 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:33,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:33,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:33,301 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1073413637, now seen corresponding path program 4 times [2021-11-02 22:41:33,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:33,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500008397] [2021-11-02 22:41:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:33,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:41:33,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:33,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500008397] [2021-11-02 22:41:33,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500008397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:33,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892988480] [2021-11-02 22:41:33,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:41:33,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:33,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:33,494 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:33,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:41:33,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:41:33,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:33,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:41:33,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:33,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-02 22:41:33,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-11-02 22:41:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-02 22:41:33,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892988480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:33,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:33,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 19 [2021-11-02 22:41:33,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329358754] [2021-11-02 22:41:33,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:41:33,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:33,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:41:33,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:41:33,901 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:34,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:34,624 INFO L93 Difference]: Finished difference Result 270 states and 323 transitions. [2021-11-02 22:41:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:41:34,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 22:41:34,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:34,627 INFO L225 Difference]: With dead ends: 270 [2021-11-02 22:41:34,627 INFO L226 Difference]: Without dead ends: 220 [2021-11-02 22:41:34,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:41:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-02 22:41:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 105. [2021-11-02 22:41:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1538461538461537) internal successors, (120), 104 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2021-11-02 22:41:34,638 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 61 [2021-11-02 22:41:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:34,638 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2021-11-02 22:41:34,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2021-11-02 22:41:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:41:34,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:34,639 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:34,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:34,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 22:41:34,853 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2024298556, now seen corresponding path program 3 times [2021-11-02 22:41:34,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:34,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471085943] [2021-11-02 22:41:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:34,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:34,866 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:41:34,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044815294] [2021-11-02 22:41:34,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:41:34,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:34,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:34,867 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:34,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:41:35,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 22:41:35,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:41:35,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 185 proven. 70 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-02 22:41:35,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:35,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471085943] [2021-11-02 22:41:35,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:41:35,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044815294] [2021-11-02 22:41:35,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044815294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:35,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:41:35,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 22:41:35,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836696932] [2021-11-02 22:41:35,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:41:35,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:35,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:41:35,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:41:35,654 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:35,957 INFO L93 Difference]: Finished difference Result 272 states and 317 transitions. [2021-11-02 22:41:35,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:41:35,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 22:41:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:35,959 INFO L225 Difference]: With dead ends: 272 [2021-11-02 22:41:35,960 INFO L226 Difference]: Without dead ends: 254 [2021-11-02 22:41:35,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:41:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-02 22:41:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 115. [2021-11-02 22:41:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 114 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) [2021-11-02 22:41:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2021-11-02 22:41:35,969 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 76 [2021-11-02 22:41:35,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:35,970 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2021-11-02 22:41:35,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2021-11-02 22:41:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 22:41:35,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:35,971 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:36,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:36,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:36,199 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:36,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:36,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1166078337, now seen corresponding path program 4 times [2021-11-02 22:41:36,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:36,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165747905] [2021-11-02 22:41:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:36,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:36,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:41:36,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476042828] [2021-11-02 22:41:36,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:41:36,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:36,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:36,216 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:36,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:41:36,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:41:36,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:36,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:41:36,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:37,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:37,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165747905] [2021-11-02 22:41:37,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:41:37,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476042828] [2021-11-02 22:41:37,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476042828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:37,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:41:37,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 22:41:37,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111197785] [2021-11-02 22:41:37,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:41:37,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:41:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:41:37,142 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:37,348 INFO L93 Difference]: Finished difference Result 459 states and 539 transitions. [2021-11-02 22:41:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:41:37,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-02 22:41:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:37,351 INFO L225 Difference]: With dead ends: 459 [2021-11-02 22:41:37,351 INFO L226 Difference]: Without dead ends: 380 [2021-11-02 22:41:37,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:41:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-02 22:41:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 150. [2021-11-02 22:41:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1208053691275168) internal successors, (167), 149 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2021-11-02 22:41:37,364 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 81 [2021-11-02 22:41:37,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:37,365 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2021-11-02 22:41:37,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2021-11-02 22:41:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-02 22:41:37,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:37,366 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:37,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:37,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:41:37,580 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:37,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:37,580 INFO L85 PathProgramCache]: Analyzing trace with hash -350545868, now seen corresponding path program 5 times [2021-11-02 22:41:37,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:37,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598707684] [2021-11-02 22:41:37,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:37,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:37,597 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:41:37,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401260145] [2021-11-02 22:41:37,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:41:37,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:37,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:37,599 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:37,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:41:38,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-02 22:41:38,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:38,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:41:38,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:39,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:39,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598707684] [2021-11-02 22:41:39,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:41:39,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401260145] [2021-11-02 22:41:39,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401260145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:39,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:41:39,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 22:41:39,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724822054] [2021-11-02 22:41:39,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:41:39,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:41:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:41:39,560 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:39,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:39,910 INFO L93 Difference]: Finished difference Result 613 states and 714 transitions. [2021-11-02 22:41:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:41:39,910 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 116 [2021-11-02 22:41:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:39,914 INFO L225 Difference]: With dead ends: 613 [2021-11-02 22:41:39,914 INFO L226 Difference]: Without dead ends: 534 [2021-11-02 22:41:39,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:41:39,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-02 22:41:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 185. [2021-11-02 22:41:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0978260869565217) internal successors, (202), 184 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 202 transitions. [2021-11-02 22:41:39,930 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 202 transitions. Word has length 116 [2021-11-02 22:41:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:39,930 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 202 transitions. [2021-11-02 22:41:39,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 202 transitions. [2021-11-02 22:41:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-02 22:41:39,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:39,933 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:39,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:40,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:41:40,147 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:40,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:40,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2125285983, now seen corresponding path program 6 times [2021-11-02 22:41:40,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:40,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355899356] [2021-11-02 22:41:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:40,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:40,194 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:41:40,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102914576] [2021-11-02 22:41:40,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:41:40,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:40,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:40,204 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:40,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:41:40,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 22:41:40,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:40,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:41:40,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 693 proven. 99 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2021-11-02 22:41:41,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:41,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355899356] [2021-11-02 22:41:41,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:41:41,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102914576] [2021-11-02 22:41:41,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102914576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:41,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:41:41,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 22:41:41,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516597603] [2021-11-02 22:41:41,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:41:41,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:41,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:41:41,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:41:41,574 INFO L87 Difference]: Start difference. First operand 185 states and 202 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:42,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:42,002 INFO L93 Difference]: Finished difference Result 377 states and 428 transitions. [2021-11-02 22:41:42,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 22:41:42,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 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 151 [2021-11-02 22:41:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:42,005 INFO L225 Difference]: With dead ends: 377 [2021-11-02 22:41:42,005 INFO L226 Difference]: Without dead ends: 359 [2021-11-02 22:41:42,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=370, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:41:42,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-02 22:41:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 195. [2021-11-02 22:41:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.1030927835051547) internal successors, (214), 194 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 214 transitions. [2021-11-02 22:41:42,018 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 214 transitions. Word has length 151 [2021-11-02 22:41:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:42,019 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 214 transitions. [2021-11-02 22:41:42,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 214 transitions. [2021-11-02 22:41:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-02 22:41:42,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:42,021 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:42,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:42,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:41:42,251 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:42,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:42,251 INFO L85 PathProgramCache]: Analyzing trace with hash 125499964, now seen corresponding path program 7 times [2021-11-02 22:41:42,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:42,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821724450] [2021-11-02 22:41:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:42,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:42,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:41:42,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275182195] [2021-11-02 22:41:42,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:41:42,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:42,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:42,274 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:42,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:41:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:42,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 22:41:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:43,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:43,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821724450] [2021-11-02 22:41:43,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:41:43,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275182195] [2021-11-02 22:41:43,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275182195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:43,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:41:43,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-02 22:41:43,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898430154] [2021-11-02 22:41:44,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:41:44,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:44,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:41:44,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:41:44,002 INFO L87 Difference]: Start difference. First operand 195 states and 214 transitions. Second operand has 32 states, 32 states have (on average 4.78125) internal successors, (153), 31 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) [2021-11-02 22:41:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:44,523 INFO L93 Difference]: Finished difference Result 809 states and 939 transitions. [2021-11-02 22:41:44,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 22:41:44,524 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.78125) internal successors, (153), 31 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 156 [2021-11-02 22:41:44,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:44,528 INFO L225 Difference]: With dead ends: 809 [2021-11-02 22:41:44,528 INFO L226 Difference]: Without dead ends: 720 [2021-11-02 22:41:44,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:41:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-11-02 22:41:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 235. [2021-11-02 22:41:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0854700854700854) internal successors, (254), 234 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 254 transitions. [2021-11-02 22:41:44,547 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 254 transitions. Word has length 156 [2021-11-02 22:41:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:44,548 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 254 transitions. [2021-11-02 22:41:44,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.78125) internal successors, (153), 31 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) [2021-11-02 22:41:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 254 transitions. [2021-11-02 22:41:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-02 22:41:44,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:44,551 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:44,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-02 22:41:44,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:44,772 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:44,772 INFO L85 PathProgramCache]: Analyzing trace with hash 802096572, now seen corresponding path program 8 times [2021-11-02 22:41:44,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:44,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298893570] [2021-11-02 22:41:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:44,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:44,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:41:44,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656220807] [2021-11-02 22:41:44,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:41:44,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:44,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:44,804 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:44,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:41:45,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:41:45,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:45,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 22:41:45,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3190 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:47,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:47,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298893570] [2021-11-02 22:41:47,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:41:47,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656220807] [2021-11-02 22:41:47,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656220807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:47,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:41:47,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-11-02 22:41:47,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649444457] [2021-11-02 22:41:47,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-02 22:41:47,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:47,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-02 22:41:47,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:41:47,131 INFO L87 Difference]: Start difference. First operand 235 states and 254 transitions. Second operand has 40 states, 40 states have (on average 4.825) internal successors, (193), 39 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:47,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:47,790 INFO L93 Difference]: Finished difference Result 985 states and 1139 transitions. [2021-11-02 22:41:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 22:41:47,790 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.825) internal successors, (193), 39 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-02 22:41:47,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:47,795 INFO L225 Difference]: With dead ends: 985 [2021-11-02 22:41:47,795 INFO L226 Difference]: Without dead ends: 896 [2021-11-02 22:41:47,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:41:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-11-02 22:41:47,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 275. [2021-11-02 22:41:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.072992700729927) internal successors, (294), 274 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 294 transitions. [2021-11-02 22:41:47,819 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 294 transitions. Word has length 196 [2021-11-02 22:41:47,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:47,819 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 294 transitions. [2021-11-02 22:41:47,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.825) internal successors, (193), 39 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:47,820 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 294 transitions. [2021-11-02 22:41:47,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-02 22:41:47,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:47,823 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:47,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:48,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:48,039 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:48,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:48,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1508798148, now seen corresponding path program 9 times [2021-11-02 22:41:48,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:48,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211696389] [2021-11-02 22:41:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:48,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:48,076 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:41:48,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093884785] [2021-11-02 22:41:48,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:41:48,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:48,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:48,089 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:48,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:41:48,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-02 22:41:48,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:48,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:41:48,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4778 backedges. 1419 proven. 133 refuted. 0 times theorem prover too weak. 3226 trivial. 0 not checked. [2021-11-02 22:41:49,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:49,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211696389] [2021-11-02 22:41:49,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:41:49,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093884785] [2021-11-02 22:41:49,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093884785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:49,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:41:49,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 22:41:49,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496281126] [2021-11-02 22:41:49,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:41:49,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:41:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:41:49,646 INFO L87 Difference]: Start difference. First operand 275 states and 294 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:50,037 INFO L93 Difference]: Finished difference Result 492 states and 549 transitions. [2021-11-02 22:41:50,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:41:50,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-11-02 22:41:50,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:50,041 INFO L225 Difference]: With dead ends: 492 [2021-11-02 22:41:50,042 INFO L226 Difference]: Without dead ends: 474 [2021-11-02 22:41:50,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:41:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-02 22:41:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 285. [2021-11-02 22:41:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0774647887323943) internal successors, (306), 284 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 306 transitions. [2021-11-02 22:41:50,089 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 306 transitions. Word has length 236 [2021-11-02 22:41:50,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:50,089 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 306 transitions. [2021-11-02 22:41:50,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 306 transitions. [2021-11-02 22:41:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-02 22:41:50,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:50,094 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:50,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:50,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:50,315 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:50,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:50,315 INFO L85 PathProgramCache]: Analyzing trace with hash -890145409, now seen corresponding path program 10 times [2021-11-02 22:41:50,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:50,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134818055] [2021-11-02 22:41:50,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:50,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:50,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:41:50,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240714084] [2021-11-02 22:41:50,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:41:50,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:50,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:50,345 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:50,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:41:52,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:41:52,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:52,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 22:41:52,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4999 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:54,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:54,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134818055] [2021-11-02 22:41:54,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:41:54,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240714084] [2021-11-02 22:41:54,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240714084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:54,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:41:54,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-11-02 22:41:54,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357277199] [2021-11-02 22:41:54,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 22:41:54,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:54,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 22:41:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:41:54,265 INFO L87 Difference]: Start difference. First operand 285 states and 306 transitions. Second operand has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 48 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:55,233 INFO L93 Difference]: Finished difference Result 1203 states and 1389 transitions. [2021-11-02 22:41:55,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 22:41:55,234 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 48 states have internal predecessors, (238), 0 states have call successors, (0), 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 241 [2021-11-02 22:41:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:55,239 INFO L225 Difference]: With dead ends: 1203 [2021-11-02 22:41:55,240 INFO L226 Difference]: Without dead ends: 1104 [2021-11-02 22:41:55,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:41:55,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-11-02 22:41:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 330. [2021-11-02 22:41:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.0668693009118542) internal successors, (351), 329 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 351 transitions. [2021-11-02 22:41:55,268 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 351 transitions. Word has length 241 [2021-11-02 22:41:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:55,269 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 351 transitions. [2021-11-02 22:41:55,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 48 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 351 transitions. [2021-11-02 22:41:55,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-02 22:41:55,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:55,273 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 54, 53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:55,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:55,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:55,494 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:55,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash -39345644, now seen corresponding path program 11 times [2021-11-02 22:41:55,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:55,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019991707] [2021-11-02 22:41:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:55,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:55,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:41:55,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016519331] [2021-11-02 22:41:55,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:41:55,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:55,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:55,557 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:55,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:42:41,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2021-11-02 22:42:41,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:41,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 22:42:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7213 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:42:44,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:44,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019991707] [2021-11-02 22:42:44,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:44,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016519331] [2021-11-02 22:42:44,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016519331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:44,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:44,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2021-11-02 22:42:44,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316125130] [2021-11-02 22:42:44,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-02 22:42:44,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:44,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-02 22:42:44,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 22:42:44,055 INFO L87 Difference]: Start difference. First operand 330 states and 351 transitions. Second operand has 58 states, 58 states have (on average 4.879310344827586) internal successors, (283), 57 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:45,352 INFO L93 Difference]: Finished difference Result 1401 states and 1614 transitions. [2021-11-02 22:42:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 22:42:45,353 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.879310344827586) internal successors, (283), 57 states have internal predecessors, (283), 0 states have call successors, (0), 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 286 [2021-11-02 22:42:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:45,361 INFO L225 Difference]: With dead ends: 1401 [2021-11-02 22:42:45,362 INFO L226 Difference]: Without dead ends: 1302 [2021-11-02 22:42:45,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 22:42:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-11-02 22:42:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 375. [2021-11-02 22:42:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.0588235294117647) internal successors, (396), 374 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 396 transitions. [2021-11-02 22:42:45,395 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 396 transitions. Word has length 286 [2021-11-02 22:42:45,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:45,396 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 396 transitions. [2021-11-02 22:42:45,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.879310344827586) internal successors, (283), 57 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 396 transitions. [2021-11-02 22:42:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-11-02 22:42:45,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:45,401 INFO L513 BasicCegarLoop]: trace histogram [63, 63, 63, 62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:45,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:45,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:45,619 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:45,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:45,619 INFO L85 PathProgramCache]: Analyzing trace with hash 966681503, now seen corresponding path program 12 times [2021-11-02 22:42:45,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:45,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227031001] [2021-11-02 22:42:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:45,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:45,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:45,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111551716] [2021-11-02 22:42:45,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:42:45,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:45,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:45,698 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:45,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:42:47,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-02 22:42:47,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:47,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:42:47,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9832 backedges. 2393 proven. 172 refuted. 0 times theorem prover too weak. 7267 trivial. 0 not checked. [2021-11-02 22:42:49,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:49,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227031001] [2021-11-02 22:42:49,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:49,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111551716] [2021-11-02 22:42:49,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111551716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:49,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:49,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:42:49,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112090137] [2021-11-02 22:42:49,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:42:49,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:49,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:42:49,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:42:49,014 INFO L87 Difference]: Start difference. First operand 375 states and 396 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:49,638 INFO L93 Difference]: Finished difference Result 617 states and 680 transitions. [2021-11-02 22:42:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:42:49,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 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 331 [2021-11-02 22:42:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:49,641 INFO L225 Difference]: With dead ends: 617 [2021-11-02 22:42:49,641 INFO L226 Difference]: Without dead ends: 599 [2021-11-02 22:42:49,642 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=582, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:42:49,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-02 22:42:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 385. [2021-11-02 22:42:49,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.0625) internal successors, (408), 384 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:49,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 408 transitions. [2021-11-02 22:42:49,667 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 408 transitions. Word has length 331 [2021-11-02 22:42:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:49,668 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 408 transitions. [2021-11-02 22:42:49,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:49,668 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 408 transitions. [2021-11-02 22:42:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-11-02 22:42:49,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:49,671 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 64, 63, 63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:49,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:49,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:49,883 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:49,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:49,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1853380356, now seen corresponding path program 13 times [2021-11-02 22:42:49,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:49,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64604631] [2021-11-02 22:42:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:49,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:49,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:49,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664480733] [2021-11-02 22:42:49,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:42:49,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:49,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:49,931 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:49,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:42:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:51,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-02 22:42:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10148 backedges. 0 proven. 10144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:42:54,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:54,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64604631] [2021-11-02 22:42:54,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:54,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664480733] [2021-11-02 22:42:54,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664480733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:54,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:54,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2021-11-02 22:42:54,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403867362] [2021-11-02 22:42:54,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-02 22:42:54,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:54,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-02 22:42:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 22:42:54,743 INFO L87 Difference]: Start difference. First operand 385 states and 408 transitions. Second operand has 68 states, 68 states have (on average 4.897058823529412) internal successors, (333), 67 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:56,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:56,333 INFO L93 Difference]: Finished difference Result 1641 states and 1889 transitions. [2021-11-02 22:42:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-02 22:42:56,334 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.897058823529412) internal successors, (333), 67 states have internal predecessors, (333), 0 states have call successors, (0), 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 336 [2021-11-02 22:42:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:56,341 INFO L225 Difference]: With dead ends: 1641 [2021-11-02 22:42:56,342 INFO L226 Difference]: Without dead ends: 1532 [2021-11-02 22:42:56,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 22:42:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-11-02 22:42:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 435. [2021-11-02 22:42:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.055299539170507) internal successors, (458), 434 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 458 transitions. [2021-11-02 22:42:56,386 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 458 transitions. Word has length 336 [2021-11-02 22:42:56,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:56,387 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 458 transitions. [2021-11-02 22:42:56,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.897058823529412) internal successors, (333), 67 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 458 transitions. [2021-11-02 22:42:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-02 22:42:56,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:56,390 INFO L513 BasicCegarLoop]: trace histogram [74, 74, 74, 73, 73, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:56,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:56,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:56,615 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:56,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash 608865116, now seen corresponding path program 14 times [2021-11-02 22:42:56,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:56,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944942458] [2021-11-02 22:42:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:56,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:56,671 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:56,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483869927] [2021-11-02 22:42:56,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:42:56,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:56,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:56,673 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:56,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:42:58,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:42:58,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:58,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-02 22:42:58,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13583 backedges. 0 proven. 13579 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:43:02,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:02,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944942458] [2021-11-02 22:43:02,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:02,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483869927] [2021-11-02 22:43:02,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483869927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:02,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:02,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2021-11-02 22:43:02,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170804650] [2021-11-02 22:43:02,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-02 22:43:02,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-02 22:43:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 22:43:02,632 INFO L87 Difference]: Start difference. First operand 435 states and 458 transitions. Second operand has 78 states, 78 states have (on average 4.910256410256411) internal successors, (383), 77 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:05,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:05,175 INFO L93 Difference]: Finished difference Result 1861 states and 2139 transitions. [2021-11-02 22:43:05,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-02 22:43:05,176 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 4.910256410256411) internal successors, (383), 77 states have internal predecessors, (383), 0 states have call successors, (0), 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 386 [2021-11-02 22:43:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:05,183 INFO L225 Difference]: With dead ends: 1861 [2021-11-02 22:43:05,183 INFO L226 Difference]: Without dead ends: 1752 [2021-11-02 22:43:05,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 22:43:05,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-11-02 22:43:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 485. [2021-11-02 22:43:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.0495867768595042) internal successors, (508), 484 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 508 transitions. [2021-11-02 22:43:05,229 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 508 transitions. Word has length 386 [2021-11-02 22:43:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:05,230 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 508 transitions. [2021-11-02 22:43:05,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 4.910256410256411) internal successors, (383), 77 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:05,230 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 508 transitions. [2021-11-02 22:43:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-11-02 22:43:05,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:05,234 INFO L513 BasicCegarLoop]: trace histogram [84, 84, 84, 83, 83, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:05,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:05,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:43:05,447 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:05,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:05,447 INFO L85 PathProgramCache]: Analyzing trace with hash -419686980, now seen corresponding path program 15 times [2021-11-02 22:43:05,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:05,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691000885] [2021-11-02 22:43:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:05,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:05,511 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:05,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616331688] [2021-11-02 22:43:05,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:43:05,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:05,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:05,518 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:05,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:43:07,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-02 22:43:07,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:07,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:43:07,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17518 backedges. 3645 proven. 216 refuted. 0 times theorem prover too weak. 13657 trivial. 0 not checked. [2021-11-02 22:43:08,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:08,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691000885] [2021-11-02 22:43:08,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:08,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616331688] [2021-11-02 22:43:08,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616331688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:08,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:08,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 22:43:08,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024278304] [2021-11-02 22:43:08,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:43:08,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:43:08,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:43:08,827 INFO L87 Difference]: Start difference. First operand 485 states and 508 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:09,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:09,574 INFO L93 Difference]: Finished difference Result 752 states and 821 transitions. [2021-11-02 22:43:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:43:09,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 436 [2021-11-02 22:43:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:09,578 INFO L225 Difference]: With dead ends: 752 [2021-11-02 22:43:09,578 INFO L226 Difference]: Without dead ends: 734 [2021-11-02 22:43:09,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=416, Invalid=706, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:43:09,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-02 22:43:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 495. [2021-11-02 22:43:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.0526315789473684) internal successors, (520), 494 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 520 transitions. [2021-11-02 22:43:09,629 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 520 transitions. Word has length 436 [2021-11-02 22:43:09,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:09,630 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 520 transitions. [2021-11-02 22:43:09,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:09,630 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 520 transitions. [2021-11-02 22:43:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-11-02 22:43:09,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:09,635 INFO L513 BasicCegarLoop]: trace histogram [85, 85, 85, 84, 84, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:09,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:09,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:43:09,859 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:09,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1503280897, now seen corresponding path program 16 times [2021-11-02 22:43:09,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:09,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523128459] [2021-11-02 22:43:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:09,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:09,914 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:09,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389460552] [2021-11-02 22:43:09,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:43:09,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:09,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:09,916 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:09,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75ed816-3f05-4b6f-a261-54175d0c6709/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process