./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label03.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_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/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_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/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_0f157055-440b-4581-92fa-bb6b5bd60270/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 89d9992650be4fcd4025f7007fb14b6b521ee1b4b929549cdf6651f6eed1ab75 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:05:13,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:05:13,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:05:13,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:05:13,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:05:13,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:05:13,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:05:13,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:05:13,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:05:13,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:05:13,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:05:13,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:05:13,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:05:13,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:05:13,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:05:13,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:05:13,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:05:13,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:05:13,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:05:13,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:05:13,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:05:13,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:05:13,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:05:13,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:05:13,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:05:13,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:05:13,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:05:13,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:05:13,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:05:13,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:05:13,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:05:13,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:05:13,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:05:13,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:05:13,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:05:13,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:05:13,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:05:13,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:05:13,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:05:13,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:05:13,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:05:13,684 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:05:13,710 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:05:13,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:05:13,711 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:05:13,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:05:13,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:05:13,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:05:13,713 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:05:13,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:05:13,714 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:05:13,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:05:13,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:05:13,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:05:13,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:05:13,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:05:13,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:05:13,716 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:05:13,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:05:13,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:05:13,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:05:13,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:05:13,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:05:13,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:05:13,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:05:13,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:05:13,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:05:13,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:05:13,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:05:13,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:05:13,719 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:05:13,719 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:05:13,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:05:13,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:05:13,719 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_0f157055-440b-4581-92fa-bb6b5bd60270/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89d9992650be4fcd4025f7007fb14b6b521ee1b4b929549cdf6651f6eed1ab75 [2021-11-02 22:05:13,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:05:14,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:05:14,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:05:14,031 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:05:14,032 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:05:14,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2021-11-02 22:05:14,117 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/data/618f6c2a0/e62c6daa4f764305a2c7232c7792a918/FLAG26c2b9706 [2021-11-02 22:05:14,977 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:05:14,977 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2021-11-02 22:05:15,008 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/data/618f6c2a0/e62c6daa4f764305a2c7232c7792a918/FLAG26c2b9706 [2021-11-02 22:05:15,048 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/data/618f6c2a0/e62c6daa4f764305a2c7232c7792a918 [2021-11-02 22:05:15,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:05:15,062 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:05:15,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:05:15,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:05:15,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:05:15,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:05:15" (1/1) ... [2021-11-02 22:05:15,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320daa64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:15, skipping insertion in model container [2021-11-02 22:05:15,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:05:15" (1/1) ... [2021-11-02 22:05:15,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:05:15,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:05:15,558 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_0f157055-440b-4581-92fa-bb6b5bd60270/sv-benchmarks/c/eca-rers2012/Problem17_label03.c[7281,7294] [2021-11-02 22:05:16,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:05:16,289 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:05:16,388 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_0f157055-440b-4581-92fa-bb6b5bd60270/sv-benchmarks/c/eca-rers2012/Problem17_label03.c[7281,7294] [2021-11-02 22:05:16,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:05:16,917 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:05:16,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:16 WrapperNode [2021-11-02 22:05:16,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:05:16,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:05:16,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:05:16,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:05:16,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:16" (1/1) ... [2021-11-02 22:05:16,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:16" (1/1) ... [2021-11-02 22:05:17,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:05:17,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:05:17,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:05:17,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:05:17,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:16" (1/1) ... [2021-11-02 22:05:17,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:16" (1/1) ... [2021-11-02 22:05:17,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:16" (1/1) ... [2021-11-02 22:05:17,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:16" (1/1) ... [2021-11-02 22:05:17,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:16" (1/1) ... [2021-11-02 22:05:17,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:16" (1/1) ... [2021-11-02 22:05:17,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:16" (1/1) ... [2021-11-02 22:05:17,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:05:17,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:05:17,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:05:17,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:05:17,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:16" (1/1) ... [2021-11-02 22:05:17,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:05:17,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:17,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:05:17,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:05:17,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:05:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:05:17,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:05:17,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:05:22,287 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:05:22,287 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-02 22:05:22,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:05:22 BoogieIcfgContainer [2021-11-02 22:05:22,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:05:22,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:05:22,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:05:22,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:05:22,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:05:15" (1/3) ... [2021-11-02 22:05:22,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c76e4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:05:22, skipping insertion in model container [2021-11-02 22:05:22,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:16" (2/3) ... [2021-11-02 22:05:22,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c76e4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:05:22, skipping insertion in model container [2021-11-02 22:05:22,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:05:22" (3/3) ... [2021-11-02 22:05:22,304 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label03.c [2021-11-02 22:05:22,313 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:05:22,313 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:05:22,385 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:05:22,393 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 22:05:22,394 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:05:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 22:05:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:05:22,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:22,445 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:22,446 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:22,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:22,461 INFO L85 PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times [2021-11-02 22:05:22,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:22,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207371076] [2021-11-02 22:05:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:22,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:22,857 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 22:05:22,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:22,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207371076] [2021-11-02 22:05:22,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207371076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:22,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:22,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:05:22,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332540241] [2021-11-02 22:05:22,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:05:22,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:22,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:05:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:22,890 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:26,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:26,331 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-11-02 22:05:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:05:26,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 22:05:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:26,358 INFO L225 Difference]: With dead ends: 1644 [2021-11-02 22:05:26,358 INFO L226 Difference]: Without dead ends: 977 [2021-11-02 22:05:26,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:26,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-02 22:05:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-11-02 22:05:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states 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 22:05:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-11-02 22:05:26,476 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 49 [2021-11-02 22:05:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:26,477 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-11-02 22:05:26,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-11-02 22:05:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-02 22:05:26,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:26,484 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:26,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:05:26,484 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:26,485 INFO L85 PathProgramCache]: Analyzing trace with hash -172834846, now seen corresponding path program 1 times [2021-11-02 22:05:26,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:26,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029207296] [2021-11-02 22:05:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:26,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:26,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:26,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029207296] [2021-11-02 22:05:26,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029207296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:26,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:26,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:05:26,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282136745] [2021-11-02 22:05:26,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:05:26,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:26,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:05:26,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:26,626 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 22:05:30,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:30,034 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2021-11-02 22:05:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:05:30,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 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 22:05:30,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:30,046 INFO L225 Difference]: With dead ends: 2813 [2021-11-02 22:05:30,047 INFO L226 Difference]: Without dead ends: 1844 [2021-11-02 22:05:30,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-02 22:05:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2021-11-02 22:05:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states 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 22:05:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2021-11-02 22:05:30,110 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 116 [2021-11-02 22:05:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:30,110 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2021-11-02 22:05:30,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 22:05:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2021-11-02 22:05:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-02 22:05:30,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:30,116 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:30,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:05:30,117 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:30,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:30,117 INFO L85 PathProgramCache]: Analyzing trace with hash -807304596, now seen corresponding path program 1 times [2021-11-02 22:05:30,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:30,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841033429] [2021-11-02 22:05:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:30,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:30,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:30,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841033429] [2021-11-02 22:05:30,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841033429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:30,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:30,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:05:30,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030029609] [2021-11-02 22:05:30,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:05:30,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:30,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:05:30,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:30,312 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:33,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:33,100 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2021-11-02 22:05:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:05:33,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-02 22:05:33,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:33,118 INFO L225 Difference]: With dead ends: 4552 [2021-11-02 22:05:33,118 INFO L226 Difference]: Without dead ends: 2713 [2021-11-02 22:05:33,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-11-02 22:05:33,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-11-02 22:05:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states 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 22:05:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2021-11-02 22:05:33,192 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 119 [2021-11-02 22:05:33,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:33,193 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2021-11-02 22:05:33,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2021-11-02 22:05:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-02 22:05:33,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:33,198 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:33,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:05:33,199 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:33,199 INFO L85 PathProgramCache]: Analyzing trace with hash 182092692, now seen corresponding path program 1 times [2021-11-02 22:05:33,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:33,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064793496] [2021-11-02 22:05:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:33,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-02 22:05:33,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:33,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064793496] [2021-11-02 22:05:33,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064793496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:33,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:33,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:05:33,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982932774] [2021-11-02 22:05:33,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:05:33,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:05:33,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:33,386 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:35,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:35,789 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2021-11-02 22:05:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:05:35,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-02 22:05:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:35,819 INFO L225 Difference]: With dead ends: 7984 [2021-11-02 22:05:35,819 INFO L226 Difference]: Without dead ends: 4421 [2021-11-02 22:05:35,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-11-02 22:05:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2021-11-02 22:05:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states 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 22:05:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2021-11-02 22:05:35,913 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 188 [2021-11-02 22:05:35,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:35,914 INFO L470 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2021-11-02 22:05:35,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:35,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2021-11-02 22:05:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-02 22:05:35,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:35,917 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:35,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:05:35,917 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:35,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:35,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1924874294, now seen corresponding path program 1 times [2021-11-02 22:05:35,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:35,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101549250] [2021-11-02 22:05:35,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:35,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:36,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:36,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101549250] [2021-11-02 22:05:36,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101549250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:36,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:36,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:05:36,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306645057] [2021-11-02 22:05:36,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:05:36,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:36,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:05:36,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:36,039 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 22:05:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:38,029 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2021-11-02 22:05:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:05:38,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2021-11-02 22:05:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:38,062 INFO L225 Difference]: With dead ends: 9273 [2021-11-02 22:05:38,062 INFO L226 Difference]: Without dead ends: 5704 [2021-11-02 22:05:38,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:38,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2021-11-02 22:05:38,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2021-11-02 22:05:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states 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 22:05:38,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2021-11-02 22:05:38,202 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 201 [2021-11-02 22:05:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:38,202 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2021-11-02 22:05:38,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 22:05:38,203 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2021-11-02 22:05:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-02 22:05:38,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:38,207 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:38,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:05:38,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1110667493, now seen corresponding path program 1 times [2021-11-02 22:05:38,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:38,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930559452] [2021-11-02 22:05:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:38,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 22:05:38,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:38,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930559452] [2021-11-02 22:05:38,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930559452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:38,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:38,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:05:38,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719922836] [2021-11-02 22:05:38,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:05:38,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:05:38,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:38,415 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:41,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:41,035 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2021-11-02 22:05:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:05:41,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-11-02 22:05:41,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:41,076 INFO L225 Difference]: With dead ends: 14376 [2021-11-02 22:05:41,076 INFO L226 Difference]: Without dead ends: 8673 [2021-11-02 22:05:41,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:41,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2021-11-02 22:05:41,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2021-11-02 22:05:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states 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 22:05:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2021-11-02 22:05:41,275 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 203 [2021-11-02 22:05:41,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:41,276 INFO L470 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2021-11-02 22:05:41,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:41,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2021-11-02 22:05:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-02 22:05:41,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:41,282 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:41,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:05:41,283 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:41,284 INFO L85 PathProgramCache]: Analyzing trace with hash -145584583, now seen corresponding path program 1 times [2021-11-02 22:05:41,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:41,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626840393] [2021-11-02 22:05:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:41,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-02 22:05:41,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:41,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626840393] [2021-11-02 22:05:41,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626840393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:41,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:41,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:05:41,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001156299] [2021-11-02 22:05:41,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:05:41,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:41,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:05:41,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:41,495 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 22:05:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:44,205 INFO L93 Difference]: Finished difference Result 13935 states and 16238 transitions. [2021-11-02 22:05:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:05:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 281 [2021-11-02 22:05:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:44,242 INFO L225 Difference]: With dead ends: 13935 [2021-11-02 22:05:44,242 INFO L226 Difference]: Without dead ends: 7832 [2021-11-02 22:05:44,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:44,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2021-11-02 22:05:44,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 7402. [2021-11-02 22:05:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 7401 states have (on average 1.1638967707066612) internal successors, (8614), 7401 states have internal predecessors, (8614), 0 states have call successors, (0), 0 states 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 22:05:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 8614 transitions. [2021-11-02 22:05:44,402 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 8614 transitions. Word has length 281 [2021-11-02 22:05:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:44,403 INFO L470 AbstractCegarLoop]: Abstraction has 7402 states and 8614 transitions. [2021-11-02 22:05:44,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 22:05:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 8614 transitions. [2021-11-02 22:05:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-02 22:05:44,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:44,409 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:44,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:05:44,410 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:44,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1693576314, now seen corresponding path program 1 times [2021-11-02 22:05:44,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:44,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753892419] [2021-11-02 22:05:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:44,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-02 22:05:44,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:44,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753892419] [2021-11-02 22:05:44,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753892419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:44,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:44,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:05:44,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959433343] [2021-11-02 22:05:44,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:05:44,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:44,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:05:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:44,536 INFO L87 Difference]: Start difference. First operand 7402 states and 8614 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 22:05:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:46,633 INFO L93 Difference]: Finished difference Result 19038 states and 22311 transitions. [2021-11-02 22:05:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:05:46,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 22:05:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:46,668 INFO L225 Difference]: With dead ends: 19038 [2021-11-02 22:05:46,669 INFO L226 Difference]: Without dead ends: 11213 [2021-11-02 22:05:46,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11213 states. [2021-11-02 22:05:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11213 to 10363. [2021-11-02 22:05:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 1.132117351862575) internal successors, (11731), 10362 states have internal predecessors, (11731), 0 states have call successors, (0), 0 states 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 22:05:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 11731 transitions. [2021-11-02 22:05:46,915 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 11731 transitions. Word has length 286 [2021-11-02 22:05:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:46,916 INFO L470 AbstractCegarLoop]: Abstraction has 10363 states and 11731 transitions. [2021-11-02 22:05:46,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states 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 22:05:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 11731 transitions. [2021-11-02 22:05:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-02 22:05:46,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:46,924 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:46,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:05:46,925 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:46,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:46,927 INFO L85 PathProgramCache]: Analyzing trace with hash -968764252, now seen corresponding path program 1 times [2021-11-02 22:05:46,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:46,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953375605] [2021-11-02 22:05:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:46,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 22:05:47,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:47,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953375605] [2021-11-02 22:05:47,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953375605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:47,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:47,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:05:47,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858336792] [2021-11-02 22:05:47,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:05:47,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:47,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:05:47,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:47,086 INFO L87 Difference]: Start difference. First operand 10363 states and 11731 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 22:05:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:49,187 INFO L93 Difference]: Finished difference Result 24567 states and 27907 transitions. [2021-11-02 22:05:49,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:05:49,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 304 [2021-11-02 22:05:49,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:49,211 INFO L225 Difference]: With dead ends: 24567 [2021-11-02 22:05:49,212 INFO L226 Difference]: Without dead ends: 13774 [2021-11-02 22:05:49,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:49,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13774 states. [2021-11-02 22:05:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13774 to 12918. [2021-11-02 22:05:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12918 states, 12917 states have (on average 1.1388867384067507) internal successors, (14711), 12917 states have internal predecessors, (14711), 0 states have call successors, (0), 0 states 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 22:05:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12918 states to 12918 states and 14711 transitions. [2021-11-02 22:05:49,427 INFO L78 Accepts]: Start accepts. Automaton has 12918 states and 14711 transitions. Word has length 304 [2021-11-02 22:05:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:49,428 INFO L470 AbstractCegarLoop]: Abstraction has 12918 states and 14711 transitions. [2021-11-02 22:05:49,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 22:05:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 12918 states and 14711 transitions. [2021-11-02 22:05:49,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-02 22:05:49,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:49,436 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:49,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:05:49,436 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:49,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1120603921, now seen corresponding path program 1 times [2021-11-02 22:05:49,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:49,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134761209] [2021-11-02 22:05:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:49,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 293 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:49,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:49,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134761209] [2021-11-02 22:05:49,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134761209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:49,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767025648] [2021-11-02 22:05:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:49,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:49,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:49,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:05:49,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:05:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:49,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:05:49,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 236 proven. 82 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-02 22:05:51,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767025648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:51,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:05:51,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-11-02 22:05:51,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227961569] [2021-11-02 22:05:51,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:05:51,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:05:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:05:51,162 INFO L87 Difference]: Start difference. First operand 12918 states and 14711 transitions. Second operand has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 22:05:58,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:58,543 INFO L93 Difference]: Finished difference Result 45901 states and 51589 transitions. [2021-11-02 22:05:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:05:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 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 309 [2021-11-02 22:05:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:58,597 INFO L225 Difference]: With dead ends: 45901 [2021-11-02 22:05:58,598 INFO L226 Difference]: Without dead ends: 30428 [2021-11-02 22:05:58,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:05:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30428 states. [2021-11-02 22:05:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30428 to 26146. [2021-11-02 22:05:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26146 states, 26145 states have (on average 1.1246127366609295) internal successors, (29403), 26145 states have internal predecessors, (29403), 0 states have call successors, (0), 0 states 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 22:05:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26146 states to 26146 states and 29403 transitions. [2021-11-02 22:05:59,208 INFO L78 Accepts]: Start accepts. Automaton has 26146 states and 29403 transitions. Word has length 309 [2021-11-02 22:05:59,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:59,209 INFO L470 AbstractCegarLoop]: Abstraction has 26146 states and 29403 transitions. [2021-11-02 22:05:59,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 22:05:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 26146 states and 29403 transitions. [2021-11-02 22:05:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-11-02 22:05:59,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:59,223 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:59,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:59,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:59,439 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:59,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2001050583, now seen corresponding path program 1 times [2021-11-02 22:05:59,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:59,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753137493] [2021-11-02 22:05:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:59,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-02 22:05:59,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:59,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753137493] [2021-11-02 22:05:59,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753137493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:59,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:59,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:05:59,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926863325] [2021-11-02 22:05:59,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:05:59,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:05:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:05:59,691 INFO L87 Difference]: Start difference. First operand 26146 states and 29403 transitions. Second operand has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 22:06:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:02,535 INFO L93 Difference]: Finished difference Result 51440 states and 57938 transitions. [2021-11-02 22:06:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:06:02,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 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 391 [2021-11-02 22:06:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:02,574 INFO L225 Difference]: With dead ends: 51440 [2021-11-02 22:06:02,574 INFO L226 Difference]: Without dead ends: 26146 [2021-11-02 22:06:02,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 22:06:02,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26146 states. [2021-11-02 22:06:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26146 to 26146. [2021-11-02 22:06:03,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26146 states, 26145 states have (on average 1.1233887932683113) internal successors, (29371), 26145 states have internal predecessors, (29371), 0 states have call successors, (0), 0 states 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 22:06:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26146 states to 26146 states and 29371 transitions. [2021-11-02 22:06:03,149 INFO L78 Accepts]: Start accepts. Automaton has 26146 states and 29371 transitions. Word has length 391 [2021-11-02 22:06:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:03,152 INFO L470 AbstractCegarLoop]: Abstraction has 26146 states and 29371 transitions. [2021-11-02 22:06:03,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 states 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 22:06:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 26146 states and 29371 transitions. [2021-11-02 22:06:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-11-02 22:06:03,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:03,174 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:03,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:06:03,175 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1628384429, now seen corresponding path program 1 times [2021-11-02 22:06:03,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:03,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530167778] [2021-11-02 22:06:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:03,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-02 22:06:03,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:03,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530167778] [2021-11-02 22:06:03,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530167778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:06:03,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:06:03,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:06:03,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917221683] [2021-11-02 22:06:03,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:06:03,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:03,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:06:03,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:06:03,372 INFO L87 Difference]: Start difference. First operand 26146 states and 29371 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:05,596 INFO L93 Difference]: Finished difference Result 60404 states and 68533 transitions. [2021-11-02 22:06:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:06:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 412 [2021-11-02 22:06:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:05,632 INFO L225 Difference]: With dead ends: 60404 [2021-11-02 22:06:05,632 INFO L226 Difference]: Without dead ends: 34681 [2021-11-02 22:06:05,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:06:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34681 states. [2021-11-02 22:06:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34681 to 32956. [2021-11-02 22:06:06,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32956 states, 32955 states have (on average 1.118676983765741) internal successors, (36866), 32955 states have internal predecessors, (36866), 0 states have call successors, (0), 0 states 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 22:06:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32956 states to 32956 states and 36866 transitions. [2021-11-02 22:06:06,240 INFO L78 Accepts]: Start accepts. Automaton has 32956 states and 36866 transitions. Word has length 412 [2021-11-02 22:06:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:06,241 INFO L470 AbstractCegarLoop]: Abstraction has 32956 states and 36866 transitions. [2021-11-02 22:06:06,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 32956 states and 36866 transitions. [2021-11-02 22:06:06,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2021-11-02 22:06:06,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:06,257 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:06,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:06:06,257 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1066513443, now seen corresponding path program 1 times [2021-11-02 22:06:06,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:06,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353506137] [2021-11-02 22:06:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:06,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 22:06:06,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:06,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353506137] [2021-11-02 22:06:06,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353506137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:06:06,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:06:06,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:06:06,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439686514] [2021-11-02 22:06:06,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:06:06,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:06:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:06:06,632 INFO L87 Difference]: Start difference. First operand 32956 states and 36866 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:08,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:08,542 INFO L93 Difference]: Finished difference Result 65052 states and 72856 transitions. [2021-11-02 22:06:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:06:08,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 418 [2021-11-02 22:06:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:08,575 INFO L225 Difference]: With dead ends: 65052 [2021-11-02 22:06:08,576 INFO L226 Difference]: Without dead ends: 32948 [2021-11-02 22:06:08,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:06:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32948 states. [2021-11-02 22:06:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32948 to 32521. [2021-11-02 22:06:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32521 states, 32520 states have (on average 1.0870848708487084) internal successors, (35352), 32520 states have internal predecessors, (35352), 0 states have call successors, (0), 0 states 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 22:06:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32521 states to 32521 states and 35352 transitions. [2021-11-02 22:06:09,120 INFO L78 Accepts]: Start accepts. Automaton has 32521 states and 35352 transitions. Word has length 418 [2021-11-02 22:06:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:09,121 INFO L470 AbstractCegarLoop]: Abstraction has 32521 states and 35352 transitions. [2021-11-02 22:06:09,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand 32521 states and 35352 transitions. [2021-11-02 22:06:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-11-02 22:06:09,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:09,140 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:09,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:06:09,141 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:09,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash 580757973, now seen corresponding path program 1 times [2021-11-02 22:06:09,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:09,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998192034] [2021-11-02 22:06:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:09,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 630 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-02 22:06:09,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:09,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998192034] [2021-11-02 22:06:09,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998192034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:06:09,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:06:09,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:06:09,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261445458] [2021-11-02 22:06:09,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:06:09,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:06:09,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:06:09,357 INFO L87 Difference]: Start difference. First operand 32521 states and 35352 transitions. Second operand has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 22:06:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:11,909 INFO L93 Difference]: Finished difference Result 67169 states and 73038 transitions. [2021-11-02 22:06:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:06:11,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 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 427 [2021-11-02 22:06:11,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:11,942 INFO L225 Difference]: With dead ends: 67169 [2021-11-02 22:06:11,942 INFO L226 Difference]: Without dead ends: 35500 [2021-11-02 22:06:11,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 22:06:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35500 states. [2021-11-02 22:06:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35500 to 35500. [2021-11-02 22:06:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35500 states, 35499 states have (on average 1.0850446491450463) internal successors, (38518), 35499 states have internal predecessors, (38518), 0 states have call successors, (0), 0 states 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 22:06:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35500 states to 35500 states and 38518 transitions. [2021-11-02 22:06:12,473 INFO L78 Accepts]: Start accepts. Automaton has 35500 states and 38518 transitions. Word has length 427 [2021-11-02 22:06:12,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:12,474 INFO L470 AbstractCegarLoop]: Abstraction has 35500 states and 38518 transitions. [2021-11-02 22:06:12,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 22:06:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 35500 states and 38518 transitions. [2021-11-02 22:06:12,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-11-02 22:06:12,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:12,483 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:12,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:06:12,484 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:12,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1757244299, now seen corresponding path program 1 times [2021-11-02 22:06:12,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:12,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847341172] [2021-11-02 22:06:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:12,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 387 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-02 22:06:12,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:12,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847341172] [2021-11-02 22:06:12,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847341172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:06:12,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:06:12,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:06:12,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960702066] [2021-11-02 22:06:12,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:06:12,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:12,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:06:12,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:06:12,669 INFO L87 Difference]: Start difference. First operand 35500 states and 38518 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 22:06:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:15,125 INFO L93 Difference]: Finished difference Result 91003 states and 98829 transitions. [2021-11-02 22:06:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:06:15,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 434 [2021-11-02 22:06:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:15,189 INFO L225 Difference]: With dead ends: 91003 [2021-11-02 22:06:15,189 INFO L226 Difference]: Without dead ends: 56355 [2021-11-02 22:06:15,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:06:15,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56355 states. [2021-11-02 22:06:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56355 to 54628. [2021-11-02 22:06:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54628 states, 54627 states have (on average 1.078880407124682) internal successors, (58936), 54627 states have internal predecessors, (58936), 0 states have call successors, (0), 0 states 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 22:06:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54628 states to 54628 states and 58936 transitions. [2021-11-02 22:06:15,913 INFO L78 Accepts]: Start accepts. Automaton has 54628 states and 58936 transitions. Word has length 434 [2021-11-02 22:06:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:15,914 INFO L470 AbstractCegarLoop]: Abstraction has 54628 states and 58936 transitions. [2021-11-02 22:06:15,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 22:06:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 54628 states and 58936 transitions. [2021-11-02 22:06:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-11-02 22:06:15,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:15,924 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:15,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:06:15,925 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:15,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1992283714, now seen corresponding path program 1 times [2021-11-02 22:06:15,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:15,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033998622] [2021-11-02 22:06:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:15,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 93 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:06:16,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:16,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033998622] [2021-11-02 22:06:16,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033998622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:16,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038493075] [2021-11-02 22:06:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:16,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:06:16,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:06:16,559 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:06:16,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:06:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:16,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:06:16,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:06:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 93 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:06:19,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038493075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:19,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:06:19,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-11-02 22:06:19,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948470767] [2021-11-02 22:06:19,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:06:19,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:06:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:06:19,685 INFO L87 Difference]: Start difference. First operand 54628 states and 58936 transitions. Second operand has 9 states, 9 states have (on average 91.22222222222223) internal successors, (821), 8 states have internal predecessors, (821), 0 states have call successors, (0), 0 states 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 22:06:26,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:26,031 INFO L93 Difference]: Finished difference Result 144682 states and 155574 transitions. [2021-11-02 22:06:26,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:06:26,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 91.22222222222223) internal successors, (821), 8 states have internal predecessors, (821), 0 states have call successors, (0), 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 435 [2021-11-02 22:06:26,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:26,119 INFO L225 Difference]: With dead ends: 144682 [2021-11-02 22:06:26,120 INFO L226 Difference]: Without dead ends: 90481 [2021-11-02 22:06:26,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:06:26,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90481 states. [2021-11-02 22:06:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90481 to 54628. [2021-11-02 22:06:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54628 states, 54627 states have (on average 1.0786790414996248) internal successors, (58925), 54627 states have internal predecessors, (58925), 0 states have call successors, (0), 0 states 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 22:06:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54628 states to 54628 states and 58925 transitions. [2021-11-02 22:06:27,316 INFO L78 Accepts]: Start accepts. Automaton has 54628 states and 58925 transitions. Word has length 435 [2021-11-02 22:06:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:27,316 INFO L470 AbstractCegarLoop]: Abstraction has 54628 states and 58925 transitions. [2021-11-02 22:06:27,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 91.22222222222223) internal successors, (821), 8 states have internal predecessors, (821), 0 states have call successors, (0), 0 states 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 22:06:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 54628 states and 58925 transitions. [2021-11-02 22:06:27,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-11-02 22:06:27,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:27,323 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:27,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-02 22:06:27,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:06:27,528 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:27,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:27,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1547686500, now seen corresponding path program 1 times [2021-11-02 22:06:27,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:27,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527056217] [2021-11-02 22:06:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:27,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-11-02 22:06:27,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:27,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527056217] [2021-11-02 22:06:27,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527056217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:06:27,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:06:27,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:06:27,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514818042] [2021-11-02 22:06:27,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:06:27,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:27,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:06:27,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:06:27,934 INFO L87 Difference]: Start difference. First operand 54628 states and 58925 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 22:06:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:30,569 INFO L93 Difference]: Finished difference Result 132721 states and 143424 transitions. [2021-11-02 22:06:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:06:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 478 [2021-11-02 22:06:30,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:30,785 INFO L225 Difference]: With dead ends: 132721 [2021-11-02 22:06:30,785 INFO L226 Difference]: Without dead ends: 78507 [2021-11-02 22:06:30,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:06:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78507 states. [2021-11-02 22:06:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78507 to 75487. [2021-11-02 22:06:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75487 states, 75486 states have (on average 1.0779747237898418) internal successors, (81372), 75486 states have internal predecessors, (81372), 0 states have call successors, (0), 0 states 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 22:06:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75487 states to 75487 states and 81372 transitions. [2021-11-02 22:06:31,810 INFO L78 Accepts]: Start accepts. Automaton has 75487 states and 81372 transitions. Word has length 478 [2021-11-02 22:06:31,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:31,811 INFO L470 AbstractCegarLoop]: Abstraction has 75487 states and 81372 transitions. [2021-11-02 22:06:31,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 22:06:31,811 INFO L276 IsEmpty]: Start isEmpty. Operand 75487 states and 81372 transitions. [2021-11-02 22:06:31,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2021-11-02 22:06:31,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:31,833 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:31,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:06:31,833 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:31,834 INFO L85 PathProgramCache]: Analyzing trace with hash 119396400, now seen corresponding path program 1 times [2021-11-02 22:06:31,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:31,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181396586] [2021-11-02 22:06:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:31,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 718 proven. 72 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 22:06:32,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:32,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181396586] [2021-11-02 22:06:32,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181396586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:32,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493764683] [2021-11-02 22:06:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:32,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:06:32,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:06:32,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:06:32,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:06:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:32,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:06:32,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:06:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 550 proven. 216 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-02 22:06:35,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493764683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:35,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:06:35,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-11-02 22:06:35,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868613712] [2021-11-02 22:06:35,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:06:35,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:35,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:06:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:06:35,740 INFO L87 Difference]: Start difference. First operand 75487 states and 81372 transitions. Second operand has 7 states, 7 states have (on average 92.42857142857143) internal successors, (647), 7 states have internal predecessors, (647), 0 states have call successors, (0), 0 states 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 22:08:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:47,795 INFO L93 Difference]: Finished difference Result 194884 states and 210365 transitions. [2021-11-02 22:08:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:08:47,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 92.42857142857143) internal successors, (647), 7 states have internal predecessors, (647), 0 states have call successors, (0), 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 539 [2021-11-02 22:08:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:47,926 INFO L225 Difference]: With dead ends: 194884 [2021-11-02 22:08:47,926 INFO L226 Difference]: Without dead ends: 118119 [2021-11-02 22:08:47,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:08:48,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118119 states. [2021-11-02 22:08:49,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118119 to 109564. [2021-11-02 22:08:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109564 states, 109563 states have (on average 1.0782380913264515) internal successors, (118135), 109563 states have internal predecessors, (118135), 0 states have call successors, (0), 0 states 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 22:08:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109564 states to 109564 states and 118135 transitions. [2021-11-02 22:08:49,916 INFO L78 Accepts]: Start accepts. Automaton has 109564 states and 118135 transitions. Word has length 539 [2021-11-02 22:08:49,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:49,916 INFO L470 AbstractCegarLoop]: Abstraction has 109564 states and 118135 transitions. [2021-11-02 22:08:49,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 92.42857142857143) internal successors, (647), 7 states have internal predecessors, (647), 0 states have call successors, (0), 0 states 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 22:08:49,917 INFO L276 IsEmpty]: Start isEmpty. Operand 109564 states and 118135 transitions. [2021-11-02 22:08:49,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2021-11-02 22:08:49,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:49,930 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:49,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:50,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:08:50,131 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:50,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:50,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1028540427, now seen corresponding path program 1 times [2021-11-02 22:08:50,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:50,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076557251] [2021-11-02 22:08:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:50,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 788 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 22:08:50,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:50,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076557251] [2021-11-02 22:08:50,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076557251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:08:50,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:08:50,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:08:50,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617376752] [2021-11-02 22:08:50,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:08:50,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:50,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:08:50,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:08:50,385 INFO L87 Difference]: Start difference. First operand 109564 states and 118135 transitions. Second operand has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 22:08:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:54,857 INFO L93 Difference]: Finished difference Result 264293 states and 284764 transitions. [2021-11-02 22:08:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:08:54,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 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 550 [2021-11-02 22:08:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:55,045 INFO L225 Difference]: With dead ends: 264293 [2021-11-02 22:08:55,045 INFO L226 Difference]: Without dead ends: 155581 [2021-11-02 22:08:55,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 22:08:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155581 states. [2021-11-02 22:08:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155581 to 143230. [2021-11-02 22:08:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143230 states, 143229 states have (on average 1.0771631443352951) internal successors, (154281), 143229 states have internal predecessors, (154281), 0 states have call successors, (0), 0 states 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 22:08:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143230 states to 143230 states and 154281 transitions. [2021-11-02 22:08:57,649 INFO L78 Accepts]: Start accepts. Automaton has 143230 states and 154281 transitions. Word has length 550 [2021-11-02 22:08:57,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:57,650 INFO L470 AbstractCegarLoop]: Abstraction has 143230 states and 154281 transitions. [2021-11-02 22:08:57,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 22:08:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 143230 states and 154281 transitions. [2021-11-02 22:08:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2021-11-02 22:08:57,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:57,671 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:57,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:08:57,671 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:57,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:57,672 INFO L85 PathProgramCache]: Analyzing trace with hash 558797188, now seen corresponding path program 1 times [2021-11-02 22:08:57,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:57,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664426459] [2021-11-02 22:08:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:57,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 796 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 22:08:57,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:57,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664426459] [2021-11-02 22:08:57,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664426459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:08:57,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:08:57,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:08:57,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738113020] [2021-11-02 22:08:57,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:08:57,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:57,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:08:57,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:08:57,915 INFO L87 Difference]: Start difference. First operand 143230 states and 154281 transitions. Second operand has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:03,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:03,150 INFO L93 Difference]: Finished difference Result 325652 states and 350244 transitions. [2021-11-02 22:09:03,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:09:03,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 554 [2021-11-02 22:09:03,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:03,443 INFO L225 Difference]: With dead ends: 325652 [2021-11-02 22:09:03,444 INFO L226 Difference]: Without dead ends: 183274 [2021-11-02 22:09:03,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 22:09:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183274 states. [2021-11-02 22:09:05,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183274 to 160284. [2021-11-02 22:09:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160284 states, 160283 states have (on average 1.0746991259210272) internal successors, (172256), 160283 states have internal predecessors, (172256), 0 states have call successors, (0), 0 states 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 22:09:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160284 states to 160284 states and 172256 transitions. [2021-11-02 22:09:06,117 INFO L78 Accepts]: Start accepts. Automaton has 160284 states and 172256 transitions. Word has length 554 [2021-11-02 22:09:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:06,117 INFO L470 AbstractCegarLoop]: Abstraction has 160284 states and 172256 transitions. [2021-11-02 22:09:06,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:09:06,118 INFO L276 IsEmpty]: Start isEmpty. Operand 160284 states and 172256 transitions. [2021-11-02 22:09:06,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2021-11-02 22:09:06,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:06,519 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:06,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:09:06,519 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:06,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:06,520 INFO L85 PathProgramCache]: Analyzing trace with hash -246051243, now seen corresponding path program 1 times [2021-11-02 22:09:06,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:06,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498628478] [2021-11-02 22:09:06,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:06,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 756 proven. 89 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 22:09:06,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:06,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498628478] [2021-11-02 22:09:06,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498628478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:09:06,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954814578] [2021-11-02 22:09:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:06,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:09:06,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:06,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:09:06,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:09:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:07,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:09:07,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:09:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 961 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-02 22:09:25,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954814578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:25,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:09:25,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-02 22:09:25,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890168190] [2021-11-02 22:09:25,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:09:25,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:09:25,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:09:25,625 INFO L87 Difference]: Start difference. First operand 160284 states and 172256 transitions. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states 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 22:09:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:51,089 INFO L93 Difference]: Finished difference Result 317111 states and 340938 transitions. [2021-11-02 22:09:51,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:09:51,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 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 565 [2021-11-02 22:09:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:51,315 INFO L225 Difference]: With dead ends: 317111 [2021-11-02 22:09:51,315 INFO L226 Difference]: Without dead ends: 174735 [2021-11-02 22:09:51,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:09:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174735 states. [2021-11-02 22:09:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174735 to 158992. [2021-11-02 22:09:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158992 states, 158991 states have (on average 1.0726833594354397) internal successors, (170547), 158991 states have internal predecessors, (170547), 0 states have call successors, (0), 0 states 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 22:09:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158992 states to 158992 states and 170547 transitions. [2021-11-02 22:09:54,275 INFO L78 Accepts]: Start accepts. Automaton has 158992 states and 170547 transitions. Word has length 565 [2021-11-02 22:09:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:54,276 INFO L470 AbstractCegarLoop]: Abstraction has 158992 states and 170547 transitions. [2021-11-02 22:09:54,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states 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 22:09:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 158992 states and 170547 transitions. [2021-11-02 22:09:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2021-11-02 22:09:54,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:54,295 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:54,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-02 22:09:54,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f157055-440b-4581-92fa-bb6b5bd60270/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 22:09:54,520 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:09:54,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:54,520 INFO L85 PathProgramCache]: Analyzing trace with hash 205374707, now seen corresponding path program 1 times [2021-11-02 22:09:54,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:54,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803278935] [2021-11-02 22:09:54,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:54,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 421 proven. 0 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-11-02 22:09:54,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:54,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803278935] [2021-11-02 22:09:54,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803278935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:54,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:54,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:09:54,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532983281] [2021-11-02 22:09:54,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:09:54,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:54,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:09:54,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:54,770 INFO L87 Difference]: Start difference. First operand 158992 states and 170547 transitions. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 22:09:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:58,254 INFO L93 Difference]: Finished difference Result 317977 states and 341248 transitions. [2021-11-02 22:09:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:09:58,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 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 570 [2021-11-02 22:09:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:58,470 INFO L225 Difference]: With dead ends: 317977 [2021-11-02 22:09:58,470 INFO L226 Difference]: Without dead ends: 159837 [2021-11-02 22:09:58,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159837 states. [2021-11-02 22:10:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159837 to 157283. [2021-11-02 22:10:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157283 states, 157282 states have (on average 1.0707455398583436) internal successors, (168409), 157282 states have internal predecessors, (168409), 0 states have call successors, (0), 0 states 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 22:10:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157283 states to 157283 states and 168409 transitions. [2021-11-02 22:10:01,567 INFO L78 Accepts]: Start accepts. Automaton has 157283 states and 168409 transitions. Word has length 570 [2021-11-02 22:10:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:01,568 INFO L470 AbstractCegarLoop]: Abstraction has 157283 states and 168409 transitions. [2021-11-02 22:10:01,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 22:10:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 157283 states and 168409 transitions. [2021-11-02 22:10:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-11-02 22:10:01,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:01,581 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:01,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 22:10:01,582 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:10:01,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:01,583 INFO L85 PathProgramCache]: Analyzing trace with hash 727384447, now seen corresponding path program 1 times [2021-11-02 22:10:01,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:01,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507497596] [2021-11-02 22:10:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:01,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 596 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2021-11-02 22:10:01,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:01,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507497596] [2021-11-02 22:10:01,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507497596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:01,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:01,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:10:01,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764752881] [2021-11-02 22:10:01,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:10:01,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:01,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:10:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:10:01,849 INFO L87 Difference]: Start difference. First operand 157283 states and 168409 transitions. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 22:10:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:05,342 INFO L93 Difference]: Finished difference Result 320943 states and 343515 transitions. [2021-11-02 22:10:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:10:05,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 577 [2021-11-02 22:10:05,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:05,565 INFO L225 Difference]: With dead ends: 320943 [2021-11-02 22:10:05,565 INFO L226 Difference]: Without dead ends: 164087 [2021-11-02 22:10:05,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:10:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164087 states. [2021-11-02 22:10:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164087 to 160655. [2021-11-02 22:10:08,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160655 states, 160654 states have (on average 1.06004207800615) internal successors, (170300), 160654 states have internal predecessors, (170300), 0 states have call successors, (0), 0 states 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 22:10:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160655 states to 160655 states and 170300 transitions. [2021-11-02 22:10:08,590 INFO L78 Accepts]: Start accepts. Automaton has 160655 states and 170300 transitions. Word has length 577 [2021-11-02 22:10:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:08,591 INFO L470 AbstractCegarLoop]: Abstraction has 160655 states and 170300 transitions. [2021-11-02 22:10:08,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states 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 22:10:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand 160655 states and 170300 transitions. [2021-11-02 22:10:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2021-11-02 22:10:08,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:08,610 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:08,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 22:10:08,611 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:10:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:08,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1429082820, now seen corresponding path program 1 times [2021-11-02 22:10:08,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:08,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310887382] [2021-11-02 22:10:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:08,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 22:10:08,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:08,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310887382] [2021-11-02 22:10:08,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310887382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:08,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:08,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:10:08,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508630914] [2021-11-02 22:10:08,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:10:08,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:08,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:10:08,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:10:08,892 INFO L87 Difference]: Start difference. First operand 160655 states and 170300 transitions. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 22:10:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:12,541 INFO L93 Difference]: Finished difference Result 309327 states and 327799 transitions. [2021-11-02 22:10:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:10:12,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 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 582 [2021-11-02 22:10:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:13,268 INFO L225 Difference]: With dead ends: 309327 [2021-11-02 22:10:13,268 INFO L226 Difference]: Without dead ends: 165295 [2021-11-02 22:10:13,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:10:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165295 states. [2021-11-02 22:10:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165295 to 158057. [2021-11-02 22:10:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158057 states, 158056 states have (on average 1.0562332337905553) internal successors, (166944), 158056 states have internal predecessors, (166944), 0 states have call successors, (0), 0 states 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 22:10:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158057 states to 158057 states and 166944 transitions. [2021-11-02 22:10:15,961 INFO L78 Accepts]: Start accepts. Automaton has 158057 states and 166944 transitions. Word has length 582 [2021-11-02 22:10:15,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:15,962 INFO L470 AbstractCegarLoop]: Abstraction has 158057 states and 166944 transitions. [2021-11-02 22:10:15,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 22:10:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 158057 states and 166944 transitions. [2021-11-02 22:10:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2021-11-02 22:10:15,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:15,986 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:15,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 22:10:15,986 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:10:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:15,987 INFO L85 PathProgramCache]: Analyzing trace with hash -927520867, now seen corresponding path program 1 times [2021-11-02 22:10:15,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:15,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512277502] [2021-11-02 22:10:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:15,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 779 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-02 22:10:16,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:16,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512277502] [2021-11-02 22:10:16,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512277502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:16,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:16,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:10:16,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896970710] [2021-11-02 22:10:16,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:10:16,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:10:16,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:10:16,264 INFO L87 Difference]: Start difference. First operand 158057 states and 166944 transitions. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)