./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label15.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label15.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX --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 c74a9fc611cd640e8aacda017f0a1ef6db7219ef212e2ffc5499141a277c3acd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:50:11,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:50:11,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:50:11,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:50:11,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:50:11,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:50:11,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:50:11,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:50:11,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:50:11,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:50:11,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:50:11,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:50:11,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:50:11,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:50:11,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:50:11,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:50:11,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:50:11,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:50:11,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:50:11,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:50:11,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:50:11,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:50:11,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:50:11,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:50:11,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:50:11,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:50:11,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:50:11,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:50:11,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:50:11,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:50:11,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:50:11,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:50:11,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:50:11,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:50:11,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:50:11,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:50:11,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:50:11,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:50:11,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:50:11,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:50:11,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:50:11,703 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:50:11,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:50:11,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:50:11,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:50:11,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:50:11,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:50:11,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:50:11,748 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:50:11,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:50:11,748 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:50:11,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:50:11,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:50:11,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:50:11,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:50:11,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:50:11,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:50:11,752 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:50:11,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:50:11,752 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:50:11,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:50:11,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:50:11,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:50:11,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:50:11,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:50:11,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:50:11,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:50:11,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:50:11,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:50:11,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:50:11,756 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:50:11,758 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:50:11,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:50:11,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:50:11,759 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_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c74a9fc611cd640e8aacda017f0a1ef6db7219ef212e2ffc5499141a277c3acd [2021-11-09 10:50:12,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:50:12,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:50:12,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:50:12,192 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:50:12,193 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:50:12,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/eca-rers2012/Problem12_label15.c [2021-11-09 10:50:12,289 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/data/939451da2/47551244e4fb4036a43b0f94ca14f260/FLAG4390a2aa8 [2021-11-09 10:50:13,350 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:50:13,352 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/sv-benchmarks/c/eca-rers2012/Problem12_label15.c [2021-11-09 10:50:13,405 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/data/939451da2/47551244e4fb4036a43b0f94ca14f260/FLAG4390a2aa8 [2021-11-09 10:50:13,732 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/data/939451da2/47551244e4fb4036a43b0f94ca14f260 [2021-11-09 10:50:13,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:50:13,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:50:13,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:50:13,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:50:13,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:50:13,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:13" (1/1) ... [2021-11-09 10:50:13,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@99591cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:13, skipping insertion in model container [2021-11-09 10:50:13,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:13" (1/1) ... [2021-11-09 10:50:13,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:50:13,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:50:14,460 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_cb62f34c-0735-47da-81a7-75fec62a0fbf/sv-benchmarks/c/eca-rers2012/Problem12_label15.c[6730,6743] [2021-11-09 10:50:15,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:50:15,893 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:50:15,945 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_cb62f34c-0735-47da-81a7-75fec62a0fbf/sv-benchmarks/c/eca-rers2012/Problem12_label15.c[6730,6743] [2021-11-09 10:50:16,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:50:16,723 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:50:16,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:16 WrapperNode [2021-11-09 10:50:16,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:50:16,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:50:16,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:50:16,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:50:16,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:16" (1/1) ... [2021-11-09 10:50:16,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:16" (1/1) ... [2021-11-09 10:50:17,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:50:17,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:50:17,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:50:17,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:50:17,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:16" (1/1) ... [2021-11-09 10:50:17,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:16" (1/1) ... [2021-11-09 10:50:17,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:16" (1/1) ... [2021-11-09 10:50:17,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:16" (1/1) ... [2021-11-09 10:50:17,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:16" (1/1) ... [2021-11-09 10:50:17,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:16" (1/1) ... [2021-11-09 10:50:17,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:16" (1/1) ... [2021-11-09 10:50:17,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:50:17,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:50:17,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:50:17,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:50:17,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:16" (1/1) ... [2021-11-09 10:50:17,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:50:18,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:18,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:50:18,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:50:18,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:50:18,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:50:18,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:50:18,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:50:24,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:50:24,137 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-09 10:50:24,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:24 BoogieIcfgContainer [2021-11-09 10:50:24,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:50:24,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:50:24,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:50:24,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:50:24,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:50:13" (1/3) ... [2021-11-09 10:50:24,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f631ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:50:24, skipping insertion in model container [2021-11-09 10:50:24,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:16" (2/3) ... [2021-11-09 10:50:24,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f631ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:50:24, skipping insertion in model container [2021-11-09 10:50:24,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:24" (3/3) ... [2021-11-09 10:50:24,156 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label15.c [2021-11-09 10:50:24,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:50:24,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:50:24,239 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:50:24,248 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 [2021-11-09 10:50:24,248 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:50:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:24,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:50:24,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:24,304 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, 1, 1, 1, 1, 1] [2021-11-09 10:50:24,305 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:24,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:24,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2021-11-09 10:50:24,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:24,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558153791] [2021-11-09 10:50:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:24,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:24,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:24,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558153791] [2021-11-09 10:50:24,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558153791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:24,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:24,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:50:24,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364796531] [2021-11-09 10:50:24,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:50:24,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:24,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:50:24,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:50:24,877 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:33,349 INFO L93 Difference]: Finished difference Result 3155 states and 6150 transitions. [2021-11-09 10:50:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:50:33,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-09 10:50:33,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:33,398 INFO L225 Difference]: With dead ends: 3155 [2021-11-09 10:50:33,399 INFO L226 Difference]: Without dead ends: 2265 [2021-11-09 10:50:33,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:50:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-11-09 10:50:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2257. [2021-11-09 10:50:33,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.5350177304964538) internal successors, (3463), 2256 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3463 transitions. [2021-11-09 10:50:33,610 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3463 transitions. Word has length 54 [2021-11-09 10:50:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:33,611 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3463 transitions. [2021-11-09 10:50:33,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3463 transitions. [2021-11-09 10:50:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-09 10:50:33,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:33,622 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, 3, 3, 3, 3, 3, 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] [2021-11-09 10:50:33,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:50:33,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:33,624 INFO L85 PathProgramCache]: Analyzing trace with hash -653035601, now seen corresponding path program 1 times [2021-11-09 10:50:33,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:33,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694267512] [2021-11-09 10:50:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:33,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 10:50:34,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:34,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694267512] [2021-11-09 10:50:34,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694267512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:34,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:34,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:50:34,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644334439] [2021-11-09 10:50:34,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:50:34,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:34,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:50:34,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:50:34,053 INFO L87 Difference]: Start difference. First operand 2257 states and 3463 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:40,237 INFO L93 Difference]: Finished difference Result 6051 states and 9664 transitions. [2021-11-09 10:50:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:50:40,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 194 [2021-11-09 10:50:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:40,266 INFO L225 Difference]: With dead ends: 6051 [2021-11-09 10:50:40,266 INFO L226 Difference]: Without dead ends: 3759 [2021-11-09 10:50:40,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:50:40,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-11-09 10:50:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2021-11-09 10:50:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3408728046833422) internal successors, (5039), 3758 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5039 transitions. [2021-11-09 10:50:40,378 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5039 transitions. Word has length 194 [2021-11-09 10:50:40,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:40,379 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5039 transitions. [2021-11-09 10:50:40,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:40,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5039 transitions. [2021-11-09 10:50:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-09 10:50:40,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:40,385 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, 3, 3, 3, 3, 3, 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] [2021-11-09 10:50:40,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:50:40,386 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:40,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1501609534, now seen corresponding path program 1 times [2021-11-09 10:50:40,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:40,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549369507] [2021-11-09 10:50:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:40,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-09 10:50:40,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:40,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549369507] [2021-11-09 10:50:40,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549369507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:40,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:40,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:50:40,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781449565] [2021-11-09 10:50:40,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:50:40,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:40,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:50:40,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:50:40,606 INFO L87 Difference]: Start difference. First operand 3759 states and 5039 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:44,305 INFO L93 Difference]: Finished difference Result 10520 states and 14356 transitions. [2021-11-09 10:50:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:50:44,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2021-11-09 10:50:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:44,352 INFO L225 Difference]: With dead ends: 10520 [2021-11-09 10:50:44,352 INFO L226 Difference]: Without dead ends: 6763 [2021-11-09 10:50:44,359 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 [2021-11-09 10:50:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-11-09 10:50:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6012. [2021-11-09 10:50:44,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 1.2814839460988188) internal successors, (7703), 6011 states have internal predecessors, (7703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 7703 transitions. [2021-11-09 10:50:44,663 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 7703 transitions. Word has length 264 [2021-11-09 10:50:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:44,666 INFO L470 AbstractCegarLoop]: Abstraction has 6012 states and 7703 transitions. [2021-11-09 10:50:44,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 7703 transitions. [2021-11-09 10:50:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-09 10:50:44,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:44,676 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:44,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:50:44,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:44,681 INFO L85 PathProgramCache]: Analyzing trace with hash -436238599, now seen corresponding path program 1 times [2021-11-09 10:50:44,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:44,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52483965] [2021-11-09 10:50:44,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:44,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 103 proven. 54 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 10:50:45,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:45,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52483965] [2021-11-09 10:50:45,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52483965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:45,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641698814] [2021-11-09 10:50:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:45,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:45,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:45,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:45,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:50:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:45,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:50:45,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:46,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641698814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:46,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:50:46,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-09 10:50:46,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516563581] [2021-11-09 10:50:46,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:50:46,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:46,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:50:46,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:50:46,305 INFO L87 Difference]: Start difference. First operand 6012 states and 7703 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:50,350 INFO L93 Difference]: Finished difference Result 15026 states and 19934 transitions. [2021-11-09 10:50:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:50:50,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 277 [2021-11-09 10:50:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:50,397 INFO L225 Difference]: With dead ends: 15026 [2021-11-09 10:50:50,398 INFO L226 Difference]: Without dead ends: 9016 [2021-11-09 10:50:50,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:50:50,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9016 states. [2021-11-09 10:50:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9016 to 9016. [2021-11-09 10:50:50,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9016 states, 9015 states have (on average 1.2657792567942319) internal successors, (11411), 9015 states have internal predecessors, (11411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9016 states to 9016 states and 11411 transitions. [2021-11-09 10:50:50,718 INFO L78 Accepts]: Start accepts. Automaton has 9016 states and 11411 transitions. Word has length 277 [2021-11-09 10:50:50,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:50,719 INFO L470 AbstractCegarLoop]: Abstraction has 9016 states and 11411 transitions. [2021-11-09 10:50:50,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:50,720 INFO L276 IsEmpty]: Start isEmpty. Operand 9016 states and 11411 transitions. [2021-11-09 10:50:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-09 10:50:50,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:50,726 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, 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, 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] [2021-11-09 10:50:50,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:50,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:50,956 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash -829867597, now seen corresponding path program 1 times [2021-11-09 10:50:50,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:50,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45267221] [2021-11-09 10:50:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:50,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-09 10:50:51,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:51,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45267221] [2021-11-09 10:50:51,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45267221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:51,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:51,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:50:51,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731373301] [2021-11-09 10:50:51,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:50:51,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:51,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:50:51,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:50:51,152 INFO L87 Difference]: Start difference. First operand 9016 states and 11411 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:55,607 INFO L93 Difference]: Finished difference Result 25540 states and 32713 transitions. [2021-11-09 10:50:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:50:55,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2021-11-09 10:50:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:55,681 INFO L225 Difference]: With dead ends: 25540 [2021-11-09 10:50:55,682 INFO L226 Difference]: Without dead ends: 16526 [2021-11-09 10:50:55,697 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 [2021-11-09 10:50:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16526 states. [2021-11-09 10:50:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16526 to 15775. [2021-11-09 10:50:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2523773297831875) internal successors, (19755), 15774 states have internal predecessors, (19755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19755 transitions. [2021-11-09 10:50:56,173 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 19755 transitions. Word has length 294 [2021-11-09 10:50:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:56,174 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 19755 transitions. [2021-11-09 10:50:56,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 19755 transitions. [2021-11-09 10:50:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-11-09 10:50:56,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:56,188 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, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:56,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:50:56,189 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:56,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1769336259, now seen corresponding path program 1 times [2021-11-09 10:50:56,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:56,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105595116] [2021-11-09 10:50:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:56,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-09 10:50:56,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:56,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105595116] [2021-11-09 10:50:56,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105595116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:56,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:56,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:50:56,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661264440] [2021-11-09 10:50:56,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:50:56,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:56,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:50:56,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:50:56,417 INFO L87 Difference]: Start difference. First operand 15775 states and 19755 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:00,147 INFO L93 Difference]: Finished difference Result 38307 states and 48288 transitions. [2021-11-09 10:51:00,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:00,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 343 [2021-11-09 10:51:00,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:00,206 INFO L225 Difference]: With dead ends: 38307 [2021-11-09 10:51:00,207 INFO L226 Difference]: Without dead ends: 22534 [2021-11-09 10:51:00,230 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 [2021-11-09 10:51:00,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2021-11-09 10:51:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534. [2021-11-09 10:51:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22534 states, 22533 states have (on average 1.204988239470998) internal successors, (27152), 22533 states have internal predecessors, (27152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:00,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 27152 transitions. [2021-11-09 10:51:00,788 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 27152 transitions. Word has length 343 [2021-11-09 10:51:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:00,789 INFO L470 AbstractCegarLoop]: Abstraction has 22534 states and 27152 transitions. [2021-11-09 10:51:00,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 27152 transitions. [2021-11-09 10:51:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-11-09 10:51:00,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:00,801 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, 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, 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] [2021-11-09 10:51:00,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:51:00,802 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:00,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:00,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1851360552, now seen corresponding path program 1 times [2021-11-09 10:51:00,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:00,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757960222] [2021-11-09 10:51:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:00,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-09 10:51:01,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:01,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757960222] [2021-11-09 10:51:01,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757960222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:01,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:01,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:51:01,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686901538] [2021-11-09 10:51:01,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:01,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:01,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:01,023 INFO L87 Difference]: Start difference. First operand 22534 states and 27152 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:04,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:04,965 INFO L93 Difference]: Finished difference Result 45066 states and 54302 transitions. [2021-11-09 10:51:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:04,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 348 [2021-11-09 10:51:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:05,027 INFO L225 Difference]: With dead ends: 45066 [2021-11-09 10:51:05,027 INFO L226 Difference]: Without dead ends: 22534 [2021-11-09 10:51:05,054 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 [2021-11-09 10:51:05,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2021-11-09 10:51:05,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534. [2021-11-09 10:51:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22534 states, 22533 states have (on average 1.1919407091820884) internal successors, (26858), 22533 states have internal predecessors, (26858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 26858 transitions. [2021-11-09 10:51:05,480 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 26858 transitions. Word has length 348 [2021-11-09 10:51:05,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:05,481 INFO L470 AbstractCegarLoop]: Abstraction has 22534 states and 26858 transitions. [2021-11-09 10:51:05,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:05,482 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 26858 transitions. [2021-11-09 10:51:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-09 10:51:05,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:05,492 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, 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, 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] [2021-11-09 10:51:05,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:51:05,493 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:05,494 INFO L85 PathProgramCache]: Analyzing trace with hash -14553240, now seen corresponding path program 1 times [2021-11-09 10:51:05,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:05,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204204910] [2021-11-09 10:51:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:05,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-09 10:51:05,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:05,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204204910] [2021-11-09 10:51:05,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204204910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:05,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:05,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:51:05,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348204492] [2021-11-09 10:51:05,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:05,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:05,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:05,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:05,700 INFO L87 Difference]: Start difference. First operand 22534 states and 26858 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:10,229 INFO L93 Difference]: Finished difference Result 60837 states and 73473 transitions. [2021-11-09 10:51:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:10,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 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 359 [2021-11-09 10:51:10,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:10,294 INFO L225 Difference]: With dead ends: 60837 [2021-11-09 10:51:10,295 INFO L226 Difference]: Without dead ends: 38305 [2021-11-09 10:51:10,310 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 [2021-11-09 10:51:10,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38305 states. [2021-11-09 10:51:10,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38305 to 38305. [2021-11-09 10:51:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38305 states, 38304 states have (on average 1.1769266917293233) internal successors, (45081), 38304 states have internal predecessors, (45081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38305 states to 38305 states and 45081 transitions. [2021-11-09 10:51:10,927 INFO L78 Accepts]: Start accepts. Automaton has 38305 states and 45081 transitions. Word has length 359 [2021-11-09 10:51:10,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:10,928 INFO L470 AbstractCegarLoop]: Abstraction has 38305 states and 45081 transitions. [2021-11-09 10:51:10,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 38305 states and 45081 transitions. [2021-11-09 10:51:10,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-11-09 10:51:10,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:10,946 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, 4, 4, 4, 4, 4, 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, 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] [2021-11-09 10:51:10,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:51:10,946 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:10,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:10,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1763235576, now seen corresponding path program 1 times [2021-11-09 10:51:10,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:10,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536377256] [2021-11-09 10:51:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:10,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 339 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:11,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:11,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536377256] [2021-11-09 10:51:11,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536377256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:11,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549709912] [2021-11-09 10:51:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:11,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:11,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:11,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:11,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:51:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:11,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:51:11,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 240 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-09 10:51:12,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549709912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:12,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:12,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-11-09 10:51:12,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450309385] [2021-11-09 10:51:12,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:51:12,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:12,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:51:12,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:51:12,992 INFO L87 Difference]: Start difference. First operand 38305 states and 45081 transitions. Second operand has 7 states, 7 states have (on average 72.71428571428571) internal successors, (509), 7 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:33,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:33,430 INFO L93 Difference]: Finished difference Result 136688 states and 162541 transitions. [2021-11-09 10:51:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:51:33,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 72.71428571428571) internal successors, (509), 7 states have internal predecessors, (509), 0 states have call successors, (0), 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 385 [2021-11-09 10:51:33,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:33,564 INFO L225 Difference]: With dead ends: 136688 [2021-11-09 10:51:33,564 INFO L226 Difference]: Without dead ends: 98385 [2021-11-09 10:51:33,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:51:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98385 states. [2021-11-09 10:51:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98385 to 95381. [2021-11-09 10:51:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95381 states, 95380 states have (on average 1.14180121618788) internal successors, (108905), 95380 states have internal predecessors, (108905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95381 states to 95381 states and 108905 transitions. [2021-11-09 10:51:35,475 INFO L78 Accepts]: Start accepts. Automaton has 95381 states and 108905 transitions. Word has length 385 [2021-11-09 10:51:35,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:35,476 INFO L470 AbstractCegarLoop]: Abstraction has 95381 states and 108905 transitions. [2021-11-09 10:51:35,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 72.71428571428571) internal successors, (509), 7 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 95381 states and 108905 transitions. [2021-11-09 10:51:35,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-11-09 10:51:35,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:35,491 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 10:51:35,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:35,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb62f34c-0735-47da-81a7-75fec62a0fbf/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:35,718 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:35,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:35,718 INFO L85 PathProgramCache]: Analyzing trace with hash -678357741, now seen corresponding path program 1 times [2021-11-09 10:51:35,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:35,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263841616] [2021-11-09 10:51:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:35,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-09 10:51:36,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:36,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263841616] [2021-11-09 10:51:36,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263841616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:36,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:36,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:51:36,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673545118] [2021-11-09 10:51:36,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:36,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:36,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:36,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:36,256 INFO L87 Difference]: Start difference. First operand 95381 states and 108905 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:40,772 INFO L93 Difference]: Finished difference Result 190760 states and 217808 transitions. [2021-11-09 10:51:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 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 390 [2021-11-09 10:51:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:40,920 INFO L225 Difference]: With dead ends: 190760 [2021-11-09 10:51:40,920 INFO L226 Difference]: Without dead ends: 95381 [2021-11-09 10:51:41,129 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 [2021-11-09 10:51:41,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95381 states. [2021-11-09 10:51:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95381 to 95381. [2021-11-09 10:51:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95381 states, 95380 states have (on average 1.1152233172572867) internal successors, (106370), 95380 states have internal predecessors, (106370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95381 states to 95381 states and 106370 transitions. [2021-11-09 10:51:43,276 INFO L78 Accepts]: Start accepts. Automaton has 95381 states and 106370 transitions. Word has length 390 [2021-11-09 10:51:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:43,296 INFO L470 AbstractCegarLoop]: Abstraction has 95381 states and 106370 transitions. [2021-11-09 10:51:43,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 95381 states and 106370 transitions. [2021-11-09 10:51:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-11-09 10:51:43,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:43,314 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:43,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 10:51:43,314 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:43,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:43,315 INFO L85 PathProgramCache]: Analyzing trace with hash -352558693, now seen corresponding path program 1 times [2021-11-09 10:51:43,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:43,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918473552] [2021-11-09 10:51:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:43,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-09 10:51:43,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:43,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918473552] [2021-11-09 10:51:43,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918473552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:43,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:43,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:51:43,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177776358] [2021-11-09 10:51:43,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:43,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:43,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:43,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:43,620 INFO L87 Difference]: Start difference. First operand 95381 states and 106370 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:48,790 INFO L93 Difference]: Finished difference Result 218547 states and 243194 transitions. [2021-11-09 10:51:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:48,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 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 438 [2021-11-09 10:51:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:48,984 INFO L225 Difference]: With dead ends: 218547 [2021-11-09 10:51:48,984 INFO L226 Difference]: Without dead ends: 123168 [2021-11-09 10:51:49,026 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 [2021-11-09 10:51:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123168 states. [2021-11-09 10:51:50,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123168 to 111903. [2021-11-09 10:51:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111903 states, 111902 states have (on average 1.100159067755715) internal successors, (123110), 111902 states have internal predecessors, (123110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111903 states to 111903 states and 123110 transitions. [2021-11-09 10:51:50,915 INFO L78 Accepts]: Start accepts. Automaton has 111903 states and 123110 transitions. Word has length 438 [2021-11-09 10:51:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:50,916 INFO L470 AbstractCegarLoop]: Abstraction has 111903 states and 123110 transitions. [2021-11-09 10:51:50,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 111903 states and 123110 transitions. [2021-11-09 10:51:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-11-09 10:51:51,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:51,264 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, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 10:51:51,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 10:51:51,265 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash 258597530, now seen corresponding path program 1 times [2021-11-09 10:51:51,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:51,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633599197] [2021-11-09 10:51:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:51,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-09 10:51:51,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:51,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633599197] [2021-11-09 10:51:51,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633599197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:51,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:51,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:51:51,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200273942] [2021-11-09 10:51:51,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:51,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:51,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:51,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:51,680 INFO L87 Difference]: Start difference. First operand 111903 states and 123110 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:55,779 INFO L93 Difference]: Finished difference Result 242579 states and 266966 transitions. [2021-11-09 10:51:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:51:55,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 450 [2021-11-09 10:51:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:55,942 INFO L225 Difference]: With dead ends: 242579 [2021-11-09 10:51:55,942 INFO L226 Difference]: Without dead ends: 123919 [2021-11-09 10:51:55,988 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 [2021-11-09 10:51:56,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123919 states. [2021-11-09 10:51:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123919 to 119413. [2021-11-09 10:51:58,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119413 states, 119412 states have (on average 1.0736274411281947) internal successors, (128204), 119412 states have internal predecessors, (128204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:58,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119413 states to 119413 states and 128204 transitions. [2021-11-09 10:51:58,265 INFO L78 Accepts]: Start accepts. Automaton has 119413 states and 128204 transitions. Word has length 450 [2021-11-09 10:51:58,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:58,266 INFO L470 AbstractCegarLoop]: Abstraction has 119413 states and 128204 transitions. [2021-11-09 10:51:58,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 119413 states and 128204 transitions. [2021-11-09 10:51:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-11-09 10:51:58,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:58,277 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, 5, 5, 5, 5, 5, 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, 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] [2021-11-09 10:51:58,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 10:51:58,278 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:58,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:58,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1236253973, now seen corresponding path program 1 times [2021-11-09 10:51:58,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:58,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330278784] [2021-11-09 10:51:58,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:58,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 483 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-09 10:51:58,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:58,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330278784] [2021-11-09 10:51:58,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330278784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:51:58,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:51:58,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:51:58,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931639592] [2021-11-09 10:51:58,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:51:58,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:58,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:51:58,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:51:58,492 INFO L87 Difference]: Start difference. First operand 119413 states and 128204 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:02,775 INFO L93 Difference]: Finished difference Result 238824 states and 256406 transitions. [2021-11-09 10:52:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:52:02,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 451 [2021-11-09 10:52:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:02,934 INFO L225 Difference]: With dead ends: 238824 [2021-11-09 10:52:02,934 INFO L226 Difference]: Without dead ends: 119413 [2021-11-09 10:52:02,988 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 [2021-11-09 10:52:03,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119413 states. [2021-11-09 10:52:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119413 to 117911. [2021-11-09 10:52:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117911 states, 117910 states have (on average 1.0597404800271393) internal successors, (124954), 117910 states have internal predecessors, (124954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:05,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117911 states to 117911 states and 124954 transitions. [2021-11-09 10:52:05,450 INFO L78 Accepts]: Start accepts. Automaton has 117911 states and 124954 transitions. Word has length 451 [2021-11-09 10:52:05,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:05,451 INFO L470 AbstractCegarLoop]: Abstraction has 117911 states and 124954 transitions. [2021-11-09 10:52:05,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 117911 states and 124954 transitions. [2021-11-09 10:52:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-11-09 10:52:05,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:05,465 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:05,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 10:52:05,465 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash 487623955, now seen corresponding path program 1 times [2021-11-09 10:52:05,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:05,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277343648] [2021-11-09 10:52:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:05,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 635 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-09 10:52:05,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:05,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277343648] [2021-11-09 10:52:05,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277343648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:05,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:05,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:52:05,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419649452] [2021-11-09 10:52:05,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:52:05,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:05,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:52:05,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:52:05,729 INFO L87 Difference]: Start difference. First operand 117911 states and 124954 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:10,040 INFO L93 Difference]: Finished difference Result 236571 states and 250660 transitions. [2021-11-09 10:52:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:52:10,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 503 [2021-11-09 10:52:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:10,203 INFO L225 Difference]: With dead ends: 236571 [2021-11-09 10:52:10,203 INFO L226 Difference]: Without dead ends: 118662 [2021-11-09 10:52:10,252 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 [2021-11-09 10:52:10,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118662 states. [2021-11-09 10:52:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118662 to 107397. [2021-11-09 10:52:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107397 states, 107396 states have (on average 1.0471339714700734) internal successors, (112458), 107396 states have internal predecessors, (112458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107397 states to 107397 states and 112458 transitions. [2021-11-09 10:52:12,569 INFO L78 Accepts]: Start accepts. Automaton has 107397 states and 112458 transitions. Word has length 503 [2021-11-09 10:52:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:12,570 INFO L470 AbstractCegarLoop]: Abstraction has 107397 states and 112458 transitions. [2021-11-09 10:52:12,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 107397 states and 112458 transitions. [2021-11-09 10:52:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-11-09 10:52:12,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:12,584 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:12,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 10:52:12,584 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:12,585 INFO L85 PathProgramCache]: Analyzing trace with hash 88206328, now seen corresponding path program 1 times [2021-11-09 10:52:12,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:12,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953800259] [2021-11-09 10:52:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:12,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-09 10:52:12,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:12,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953800259] [2021-11-09 10:52:12,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953800259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:12,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:12,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:52:12,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842310227] [2021-11-09 10:52:12,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:52:12,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:12,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:52:12,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:52:12,859 INFO L87 Difference]: Start difference. First operand 107397 states and 112458 transitions. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:17,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:17,148 INFO L93 Difference]: Finished difference Result 230563 states and 241753 transitions. [2021-11-09 10:52:17,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:52:17,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 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 516 [2021-11-09 10:52:17,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:17,323 INFO L225 Difference]: With dead ends: 230563 [2021-11-09 10:52:17,323 INFO L226 Difference]: Without dead ends: 123168 [2021-11-09 10:52:17,371 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 [2021-11-09 10:52:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123168 states. [2021-11-09 10:52:19,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123168 to 123168. [2021-11-09 10:52:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123168 states, 123167 states have (on average 1.0450688902059806) internal successors, (128718), 123167 states have internal predecessors, (128718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123168 states to 123168 states and 128718 transitions. [2021-11-09 10:52:19,497 INFO L78 Accepts]: Start accepts. Automaton has 123168 states and 128718 transitions. Word has length 516 [2021-11-09 10:52:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:19,497 INFO L470 AbstractCegarLoop]: Abstraction has 123168 states and 128718 transitions. [2021-11-09 10:52:19,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 123168 states and 128718 transitions. [2021-11-09 10:52:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2021-11-09 10:52:19,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:19,510 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, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:19,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 10:52:19,511 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:19,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1452997448, now seen corresponding path program 1 times [2021-11-09 10:52:19,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:19,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941092970] [2021-11-09 10:52:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:19,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-11-09 10:52:19,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:19,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941092970] [2021-11-09 10:52:19,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941092970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:19,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:19,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:52:19,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040009823] [2021-11-09 10:52:19,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:52:19,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:52:19,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:52:19,835 INFO L87 Difference]: Start difference. First operand 123168 states and 128718 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:24,950 INFO L93 Difference]: Finished difference Result 287639 states and 300757 transitions. [2021-11-09 10:52:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:52:24,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 534 [2021-11-09 10:52:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:25,757 INFO L225 Difference]: With dead ends: 287639 [2021-11-09 10:52:25,757 INFO L226 Difference]: Without dead ends: 163722 [2021-11-09 10:52:25,851 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 [2021-11-09 10:52:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163722 states. [2021-11-09 10:52:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163722 to 150955. [2021-11-09 10:52:28,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150955 states, 150954 states have (on average 1.044285013977768) internal successors, (157639), 150954 states have internal predecessors, (157639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150955 states to 150955 states and 157639 transitions. [2021-11-09 10:52:28,388 INFO L78 Accepts]: Start accepts. Automaton has 150955 states and 157639 transitions. Word has length 534 [2021-11-09 10:52:28,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:28,388 INFO L470 AbstractCegarLoop]: Abstraction has 150955 states and 157639 transitions. [2021-11-09 10:52:28,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 150955 states and 157639 transitions. [2021-11-09 10:52:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-11-09 10:52:28,407 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:28,408 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, 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, 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, 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] [2021-11-09 10:52:28,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 10:52:28,409 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:28,409 INFO L85 PathProgramCache]: Analyzing trace with hash 696740776, now seen corresponding path program 1 times [2021-11-09 10:52:28,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:28,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810272568] [2021-11-09 10:52:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:28,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 574 proven. 0 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2021-11-09 10:52:29,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:29,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810272568] [2021-11-09 10:52:29,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810272568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:29,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:29,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:52:29,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167352955] [2021-11-09 10:52:29,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:52:29,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:29,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:52:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:52:29,480 INFO L87 Difference]: Start difference. First operand 150955 states and 157639 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:34,988 INFO L93 Difference]: Finished difference Result 333450 states and 348532 transitions. [2021-11-09 10:52:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:52:34,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 575 [2021-11-09 10:52:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:35,278 INFO L225 Difference]: With dead ends: 333450 [2021-11-09 10:52:35,278 INFO L226 Difference]: Without dead ends: 182497 [2021-11-09 10:52:35,368 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 [2021-11-09 10:52:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182497 states. [2021-11-09 10:52:38,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182497 to 180995. [2021-11-09 10:52:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180995 states, 180994 states have (on average 1.0427306982551907) internal successors, (188728), 180994 states have internal predecessors, (188728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)