./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD --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 7f61497696f0e412e267c342267f07f29bf3ce290f707b3aa1a4f0ac00ff0274 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:16:02,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:16:02,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:16:02,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:16:02,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:16:02,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:16:02,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:16:02,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:16:02,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:16:02,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:16:02,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:16:02,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:16:02,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:16:02,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:16:02,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:16:02,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:16:02,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:16:02,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:16:02,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:16:02,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:16:02,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:16:02,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:16:02,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:16:02,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:16:02,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:16:02,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:16:02,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:16:02,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:16:02,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:16:02,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:16:02,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:16:02,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:16:02,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:16:02,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:16:02,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:16:02,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:16:02,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:16:02,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:16:02,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:16:02,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:16:02,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:16:02,683 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:16:02,736 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:16:02,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:16:02,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:16:02,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:16:02,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:16:02,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:16:02,740 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:16:02,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:16:02,741 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:16:02,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:16:02,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:16:02,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:16:02,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:16:02,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:16:02,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:16:02,744 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:16:02,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:16:02,745 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:16:02,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:16:02,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:16:02,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:16:02,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:16:02,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:16:02,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:16:02,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:16:02,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:16:02,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:16:02,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:16:02,748 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:16:02,750 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:16:02,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:16:02,751 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:16:02,751 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_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f61497696f0e412e267c342267f07f29bf3ce290f707b3aa1a4f0ac00ff0274 [2021-10-28 23:16:03,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:16:03,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:16:03,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:16:03,156 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:16:03,157 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:16:03,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2021-10-28 23:16:03,270 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/data/a00cb239a/41ec635980ba419d939d3021a2b43b14/FLAG1366e2c9b [2021-10-28 23:16:03,820 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:16:03,821 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2021-10-28 23:16:03,830 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/data/a00cb239a/41ec635980ba419d939d3021a2b43b14/FLAG1366e2c9b [2021-10-28 23:16:04,147 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/data/a00cb239a/41ec635980ba419d939d3021a2b43b14 [2021-10-28 23:16:04,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:16:04,152 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:16:04,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:16:04,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:16:04,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:16:04,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:16:04" (1/1) ... [2021-10-28 23:16:04,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a0680f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04, skipping insertion in model container [2021-10-28 23:16:04,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:16:04" (1/1) ... [2021-10-28 23:16:04,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:16:04,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:16:04,413 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_ae819e40-705a-48d4-a9a2-27190767880d/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] [2021-10-28 23:16:04,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:16:04,471 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:16:04,500 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_ae819e40-705a-48d4-a9a2-27190767880d/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] [2021-10-28 23:16:04,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:16:04,551 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:16:04,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04 WrapperNode [2021-10-28 23:16:04,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:16:04,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:16:04,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:16:04,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:16:04,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04" (1/1) ... [2021-10-28 23:16:04,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04" (1/1) ... [2021-10-28 23:16:04,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:16:04,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:16:04,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:16:04,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:16:04,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04" (1/1) ... [2021-10-28 23:16:04,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04" (1/1) ... [2021-10-28 23:16:04,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04" (1/1) ... [2021-10-28 23:16:04,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04" (1/1) ... [2021-10-28 23:16:04,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04" (1/1) ... [2021-10-28 23:16:04,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04" (1/1) ... [2021-10-28 23:16:04,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04" (1/1) ... [2021-10-28 23:16:04,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:16:04,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:16:04,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:16:04,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:16:04,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04" (1/1) ... [2021-10-28 23:16:04,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:16:04,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:04,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:16:04,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:16:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:16:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:16:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:16:04,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:16:05,047 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:16:05,047 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-28 23:16:05,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:16:05 BoogieIcfgContainer [2021-10-28 23:16:05,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:16:05,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:16:05,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:16:05,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:16:05,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:16:04" (1/3) ... [2021-10-28 23:16:05,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea54abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:16:05, skipping insertion in model container [2021-10-28 23:16:05,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:16:04" (2/3) ... [2021-10-28 23:16:05,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea54abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:16:05, skipping insertion in model container [2021-10-28 23:16:05,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:16:05" (3/3) ... [2021-10-28 23:16:05,071 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2021-10-28 23:16:05,091 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:16:05,091 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-28 23:16:05,178 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:16:05,196 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 [2021-10-28 23:16:05,197 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-28 23:16:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 23:16:05,250 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:05,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:16:05,251 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:05,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:05,275 INFO L85 PathProgramCache]: Analyzing trace with hash 890461031, now seen corresponding path program 1 times [2021-10-28 23:16:05,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:05,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585479828] [2021-10-28 23:16:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:05,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:16:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:05,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:05,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585479828] [2021-10-28 23:16:05,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585479828] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:16:05,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:16:05,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:16:05,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78945469] [2021-10-28 23:16:05,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:16:05,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:05,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:16:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:16:05,552 INFO L87 Difference]: Start difference. First operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:05,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:05,578 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-10-28 23:16:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:16:05,580 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-28 23:16:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:05,591 INFO L225 Difference]: With dead ends: 34 [2021-10-28 23:16:05,591 INFO L226 Difference]: Without dead ends: 14 [2021-10-28 23:16:05,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:16:05,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-28 23:16:05,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-28 23:16:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-28 23:16:05,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-10-28 23:16:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:05,642 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-28 23:16:05,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:05,643 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-28 23:16:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-28 23:16:05,644 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:05,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:16:05,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:16:05,645 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:05,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:05,646 INFO L85 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-28 23:16:05,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:05,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312488349] [2021-10-28 23:16:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:05,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:05,675 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:05,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921732283] [2021-10-28 23:16:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:05,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:05,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:05,687 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:05,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:16:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:16:05,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:16:05,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:06,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:06,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312488349] [2021-10-28 23:16:06,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:06,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921732283] [2021-10-28 23:16:06,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921732283] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:16:06,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:16:06,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:16:06,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282692335] [2021-10-28 23:16:06,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:16:06,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:16:06,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:16:06,007 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:06,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:06,076 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-10-28 23:16:06,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:16:06,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-10-28 23:16:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:06,078 INFO L225 Difference]: With dead ends: 30 [2021-10-28 23:16:06,078 INFO L226 Difference]: Without dead ends: 23 [2021-10-28 23:16:06,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:16:06,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-28 23:16:06,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-10-28 23:16:06,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-10-28 23:16:06,086 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-10-28 23:16:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:06,086 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-10-28 23:16:06,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-10-28 23:16:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:16:06,088 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:06,088 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:06,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:06,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:06,305 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:06,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:06,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1545533000, now seen corresponding path program 1 times [2021-10-28 23:16:06,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:06,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650247930] [2021-10-28 23:16:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:06,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:06,348 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:06,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043019224] [2021-10-28 23:16:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:06,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:06,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:06,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:06,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:16:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:16:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:16:06,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:06,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:06,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650247930] [2021-10-28 23:16:06,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:06,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043019224] [2021-10-28 23:16:06,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043019224] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:06,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:06,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:16:06,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045042177] [2021-10-28 23:16:06,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:16:06,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:06,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:16:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:16:06,887 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:07,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:07,057 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-28 23:16:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:16:07,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-10-28 23:16:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:07,062 INFO L225 Difference]: With dead ends: 35 [2021-10-28 23:16:07,062 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 23:16:07,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:16:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 23:16:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-10-28 23:16:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-28 23:16:07,069 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-28 23:16:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:07,069 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-28 23:16:07,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:07,070 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-28 23:16:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 23:16:07,071 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:07,071 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:07,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:07,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:07,295 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:07,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:07,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1602791302, now seen corresponding path program 1 times [2021-10-28 23:16:07,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:07,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438191906] [2021-10-28 23:16:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:07,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:07,314 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:07,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926050218] [2021-10-28 23:16:07,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:07,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:07,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:07,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:07,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:16:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:16:07,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:16:07,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:07,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:07,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438191906] [2021-10-28 23:16:07,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:07,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926050218] [2021-10-28 23:16:07,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926050218] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:07,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:07,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:16:07,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708657889] [2021-10-28 23:16:07,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:16:07,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:07,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:16:07,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:16:07,673 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:07,816 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-28 23:16:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:16:07,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-10-28 23:16:07,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:07,820 INFO L225 Difference]: With dead ends: 39 [2021-10-28 23:16:07,820 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 23:16:07,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:16:07,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 23:16:07,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-28 23:16:07,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:07,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-28 23:16:07,835 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2021-10-28 23:16:07,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:07,835 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-28 23:16:07,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-28 23:16:07,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:16:07,837 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:07,837 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:07,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:08,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:08,053 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash -666919436, now seen corresponding path program 1 times [2021-10-28 23:16:08,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:08,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36761434] [2021-10-28 23:16:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:08,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:08,074 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:08,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959733864] [2021-10-28 23:16:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:08,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:08,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:08,076 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:08,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:16:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:16:08,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:16:08,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:08,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:08,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36761434] [2021-10-28 23:16:08,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:08,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959733864] [2021-10-28 23:16:08,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959733864] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:08,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:08,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-28 23:16:08,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721005717] [2021-10-28 23:16:08,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:16:08,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:08,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:16:08,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:16:08,231 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:08,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:08,258 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-10-28 23:16:08,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:16:08,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-10-28 23:16:08,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:08,259 INFO L225 Difference]: With dead ends: 32 [2021-10-28 23:16:08,259 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 23:16:08,260 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:16:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 23:16:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 23:16:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-28 23:16:08,265 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2021-10-28 23:16:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:08,266 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-28 23:16:08,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-28 23:16:08,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:16:08,267 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:08,267 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:08,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:08,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:08,493 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:08,493 INFO L85 PathProgramCache]: Analyzing trace with hash -919296115, now seen corresponding path program 1 times [2021-10-28 23:16:08,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:08,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141127012] [2021-10-28 23:16:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:08,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:08,511 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:08,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098655931] [2021-10-28 23:16:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:08,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:08,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:08,513 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:08,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:16:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:16:08,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:16:08,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:09,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:09,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141127012] [2021-10-28 23:16:09,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:09,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098655931] [2021-10-28 23:16:09,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098655931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:09,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:09,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:16:09,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921862755] [2021-10-28 23:16:09,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:16:09,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:16:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:16:09,067 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:09,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:09,229 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-10-28 23:16:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:16:09,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-10-28 23:16:09,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:09,230 INFO L225 Difference]: With dead ends: 38 [2021-10-28 23:16:09,230 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 23:16:09,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:16:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 23:16:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2021-10-28 23:16:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-10-28 23:16:09,237 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-10-28 23:16:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:09,237 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-10-28 23:16:09,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:09,238 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-10-28 23:16:09,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:16:09,239 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:09,239 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 23:16:09,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:09,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 23:16:09,453 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:09,453 INFO L85 PathProgramCache]: Analyzing trace with hash -443375322, now seen corresponding path program 2 times [2021-10-28 23:16:09,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:09,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007160511] [2021-10-28 23:16:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:09,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:09,464 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:09,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232929574] [2021-10-28 23:16:09,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:16:09,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:09,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:09,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:09,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:16:09,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:16:09,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:09,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-28 23:16:09,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:09,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:09,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007160511] [2021-10-28 23:16:09,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:09,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232929574] [2021-10-28 23:16:09,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232929574] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:09,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:09,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:16:09,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382289791] [2021-10-28 23:16:09,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:16:09,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:09,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:16:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:16:09,995 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:10,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:10,210 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-10-28 23:16:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:16:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-10-28 23:16:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:10,213 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:16:10,213 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 23:16:10,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:16:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 23:16:10,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-10-28 23:16:10,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-28 23:16:10,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2021-10-28 23:16:10,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:10,221 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-28 23:16:10,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-28 23:16:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:16:10,222 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:10,223 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:10,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:10,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:10,445 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:10,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:10,446 INFO L85 PathProgramCache]: Analyzing trace with hash -500633624, now seen corresponding path program 1 times [2021-10-28 23:16:10,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:10,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763730711] [2021-10-28 23:16:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:10,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:10,461 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:10,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443483553] [2021-10-28 23:16:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:10,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:10,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:10,463 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:10,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:16:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:16:10,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:16:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:11,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:11,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763730711] [2021-10-28 23:16:11,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:11,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443483553] [2021-10-28 23:16:11,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443483553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:11,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:11,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:16:11,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285906660] [2021-10-28 23:16:11,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:16:11,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:11,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:16:11,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:16:11,517 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:12,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:12,578 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-10-28 23:16:12,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:16:12,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-10-28 23:16:12,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:12,590 INFO L225 Difference]: With dead ends: 60 [2021-10-28 23:16:12,591 INFO L226 Difference]: Without dead ends: 48 [2021-10-28 23:16:12,591 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:16:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-28 23:16:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-10-28 23:16:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-10-28 23:16:12,599 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 18 [2021-10-28 23:16:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:12,600 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-10-28 23:16:12,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-10-28 23:16:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:16:12,603 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:12,603 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:12,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:12,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:12,829 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:12,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:12,830 INFO L85 PathProgramCache]: Analyzing trace with hash -701540760, now seen corresponding path program 2 times [2021-10-28 23:16:12,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:12,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477209877] [2021-10-28 23:16:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:12,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:12,843 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:12,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255238828] [2021-10-28 23:16:12,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:16:12,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:12,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:12,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:12,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:16:13,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:16:13,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:13,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:16:13,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:13,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:13,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477209877] [2021-10-28 23:16:13,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:13,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255238828] [2021-10-28 23:16:13,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255238828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:13,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:13,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:16:13,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213296461] [2021-10-28 23:16:13,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:16:13,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:13,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:16:13,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:16:13,325 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:13,578 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-10-28 23:16:13,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:16:13,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-10-28 23:16:13,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:13,581 INFO L225 Difference]: With dead ends: 57 [2021-10-28 23:16:13,581 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 23:16:13,582 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:16:13,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 23:16:13,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2021-10-28 23:16:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-10-28 23:16:13,591 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 18 [2021-10-28 23:16:13,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:13,591 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-10-28 23:16:13,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:13,592 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-10-28 23:16:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:16:13,597 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:13,597 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 23:16:13,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:13,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 23:16:13,815 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:13,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash -758799062, now seen corresponding path program 2 times [2021-10-28 23:16:13,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:13,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187329541] [2021-10-28 23:16:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:13,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:13,833 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:13,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766515881] [2021-10-28 23:16:13,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:16:13,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:13,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:13,836 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:13,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:16:14,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:16:14,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 23:16:14,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:14,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:14,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187329541] [2021-10-28 23:16:14,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:14,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766515881] [2021-10-28 23:16:14,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766515881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:14,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:14,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 23:16:14,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157528166] [2021-10-28 23:16:14,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 23:16:14,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:16:14,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:16:14,551 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:14,946 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-10-28 23:16:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:16:14,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-10-28 23:16:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:14,948 INFO L225 Difference]: With dead ends: 60 [2021-10-28 23:16:14,948 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 23:16:14,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:16:14,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 23:16:14,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-10-28 23:16:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-10-28 23:16:14,957 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 18 [2021-10-28 23:16:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:14,957 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-10-28 23:16:14,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:14,957 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-10-28 23:16:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 23:16:14,958 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:14,958 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:14,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-28 23:16:15,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 23:16:15,181 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:15,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:15,181 INFO L85 PathProgramCache]: Analyzing trace with hash -859769786, now seen corresponding path program 2 times [2021-10-28 23:16:15,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:15,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947442407] [2021-10-28 23:16:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:15,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:15,211 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:15,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319107524] [2021-10-28 23:16:15,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:16:15,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:15,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:15,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:15,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:16:15,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:16:15,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:16:15,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:15,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:15,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947442407] [2021-10-28 23:16:15,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:15,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319107524] [2021-10-28 23:16:15,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319107524] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:15,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:15,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 23:16:15,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870137066] [2021-10-28 23:16:15,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:16:15,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:15,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:16:15,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:16:15,526 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:15,560 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-10-28 23:16:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:16:15,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-10-28 23:16:15,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:15,563 INFO L225 Difference]: With dead ends: 50 [2021-10-28 23:16:15,564 INFO L226 Difference]: Without dead ends: 46 [2021-10-28 23:16:15,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:16:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-28 23:16:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-28 23:16:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-10-28 23:16:15,580 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 19 [2021-10-28 23:16:15,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:15,581 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-10-28 23:16:15,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-10-28 23:16:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:16:15,582 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:15,583 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:15,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:15,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 23:16:15,809 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:15,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1564888737, now seen corresponding path program 2 times [2021-10-28 23:16:15,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:15,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544902826] [2021-10-28 23:16:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:15,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:15,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:15,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704347220] [2021-10-28 23:16:15,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:16:15,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:15,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:15,840 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:15,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:16:16,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:16:16,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:16,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:16:16,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:16,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:16,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544902826] [2021-10-28 23:16:16,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:16,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704347220] [2021-10-28 23:16:16,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704347220] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:16,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:16,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:16:16,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244031444] [2021-10-28 23:16:16,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:16:16,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:16,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:16:16,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:16:16,813 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:17,212 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-10-28 23:16:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:16:17,213 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-28 23:16:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:17,214 INFO L225 Difference]: With dead ends: 61 [2021-10-28 23:16:17,214 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 23:16:17,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:16:17,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 23:16:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-10-28 23:16:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:17,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-10-28 23:16:17,233 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 21 [2021-10-28 23:16:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:17,234 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-10-28 23:16:17,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:17,235 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-10-28 23:16:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:16:17,236 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:17,237 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:17,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:17,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:17,445 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:17,445 INFO L85 PathProgramCache]: Analyzing trace with hash -285025059, now seen corresponding path program 1 times [2021-10-28 23:16:17,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:17,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168910311] [2021-10-28 23:16:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:17,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:17,456 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:17,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502619868] [2021-10-28 23:16:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:17,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:17,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:17,457 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:17,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:16:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:16:17,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:16:17,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:17,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:17,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168910311] [2021-10-28 23:16:17,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:17,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502619868] [2021-10-28 23:16:17,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502619868] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:17,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:17,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:16:17,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782890895] [2021-10-28 23:16:17,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:16:17,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:17,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:16:17,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:16:17,972 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:18,257 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-10-28 23:16:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:16:18,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-28 23:16:18,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:18,258 INFO L225 Difference]: With dead ends: 53 [2021-10-28 23:16:18,258 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 23:16:18,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:16:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 23:16:18,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-10-28 23:16:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-28 23:16:18,265 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-10-28 23:16:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:18,265 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-28 23:16:18,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:18,266 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-28 23:16:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 23:16:18,267 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:18,267 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-10-28 23:16:18,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:18,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:16:18,493 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:18,493 INFO L85 PathProgramCache]: Analyzing trace with hash -429625836, now seen corresponding path program 3 times [2021-10-28 23:16:18,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:18,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406389156] [2021-10-28 23:16:18,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:18,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:18,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:18,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073778826] [2021-10-28 23:16:18,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:16:18,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:18,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:18,512 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:18,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:16:19,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:16:19,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:19,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:16:19,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 23:16:19,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:19,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406389156] [2021-10-28 23:16:19,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:19,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073778826] [2021-10-28 23:16:19,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073778826] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:19,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:19,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:16:19,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995652231] [2021-10-28 23:16:19,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:16:19,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:19,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:16:19,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:16:19,725 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:20,040 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-10-28 23:16:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:16:20,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 24 [2021-10-28 23:16:20,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:20,042 INFO L225 Difference]: With dead ends: 64 [2021-10-28 23:16:20,042 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 23:16:20,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:16:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 23:16:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-10-28 23:16:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-10-28 23:16:20,050 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2021-10-28 23:16:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:20,051 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-10-28 23:16:20,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-10-28 23:16:20,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 23:16:20,052 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:20,052 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2021-10-28 23:16:20,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:20,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:20,262 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:20,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:20,262 INFO L85 PathProgramCache]: Analyzing trace with hash -486884138, now seen corresponding path program 3 times [2021-10-28 23:16:20,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:20,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609494109] [2021-10-28 23:16:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:20,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:20,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:20,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429002957] [2021-10-28 23:16:20,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:16:20,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:20,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:20,286 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:20,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:16:20,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:16:20,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:20,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:16:20,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 23:16:20,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:20,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609494109] [2021-10-28 23:16:20,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:20,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429002957] [2021-10-28 23:16:20,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429002957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:20,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:20,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:16:20,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141706576] [2021-10-28 23:16:20,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:16:20,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:20,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:16:20,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:16:20,718 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:20,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:20,932 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-10-28 23:16:20,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:16:20,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 24 [2021-10-28 23:16:20,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:20,933 INFO L225 Difference]: With dead ends: 47 [2021-10-28 23:16:20,933 INFO L226 Difference]: Without dead ends: 45 [2021-10-28 23:16:20,934 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:16:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-28 23:16:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-10-28 23:16:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-10-28 23:16:20,946 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2021-10-28 23:16:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:20,947 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-10-28 23:16:20,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-10-28 23:16:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 23:16:20,949 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:20,949 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:20,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:21,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:16:21,150 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:21,150 INFO L85 PathProgramCache]: Analyzing trace with hash -433535720, now seen corresponding path program 3 times [2021-10-28 23:16:21,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:21,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102639049] [2021-10-28 23:16:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:21,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:21,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:21,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452004125] [2021-10-28 23:16:21,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:16:21,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:21,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:21,183 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:21,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:16:21,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:16:21,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:16:21,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:21,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:21,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102639049] [2021-10-28 23:16:21,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:21,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452004125] [2021-10-28 23:16:21,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452004125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:21,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:21,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:16:21,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060654808] [2021-10-28 23:16:21,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:16:21,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:21,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:16:21,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:16:21,557 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:21,610 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-10-28 23:16:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:16:21,610 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-28 23:16:21,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:21,611 INFO L225 Difference]: With dead ends: 48 [2021-10-28 23:16:21,611 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 23:16:21,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:16:21,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 23:16:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-28 23:16:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-10-28 23:16:21,617 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2021-10-28 23:16:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:21,617 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-10-28 23:16:21,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-10-28 23:16:21,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 23:16:21,618 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:21,618 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:21,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:21,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:16:21,845 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash 24155569, now seen corresponding path program 3 times [2021-10-28 23:16:21,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:21,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589787281] [2021-10-28 23:16:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:21,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:21,855 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:21,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217474586] [2021-10-28 23:16:21,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:16:21,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:21,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:21,861 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:21,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:16:22,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:16:22,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:22,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:16:22,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 23:16:23,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:23,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589787281] [2021-10-28 23:16:23,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:23,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217474586] [2021-10-28 23:16:23,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217474586] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:16:23,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:16:23,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 23:16:23,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404159918] [2021-10-28 23:16:23,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:16:23,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:23,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:16:23,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:16:23,221 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:23,423 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-10-28 23:16:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:16:23,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 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 27 [2021-10-28 23:16:23,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:23,424 INFO L225 Difference]: With dead ends: 48 [2021-10-28 23:16:23,424 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 23:16:23,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:16:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 23:16:23,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-28 23:16:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-10-28 23:16:23,432 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 27 [2021-10-28 23:16:23,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:23,433 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-10-28 23:16:23,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-10-28 23:16:23,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:16:23,434 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:23,434 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:23,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:23,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:16:23,643 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1957613462, now seen corresponding path program 4 times [2021-10-28 23:16:23,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:23,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771651787] [2021-10-28 23:16:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:23,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:23,654 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:23,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126104392] [2021-10-28 23:16:23,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:16:23,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:23,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:23,655 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:23,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:16:23,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:16:23,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:16:23,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:16:23,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:16:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:16:24,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:16:24,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771651787] [2021-10-28 23:16:24,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:16:24,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126104392] [2021-10-28 23:16:24,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126104392] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:16:24,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:16:24,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:16:24,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086664288] [2021-10-28 23:16:24,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:16:24,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:16:24,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:16:24,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:16:24,128 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:16:24,203 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-10-28 23:16:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:16:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-28 23:16:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:16:24,205 INFO L225 Difference]: With dead ends: 54 [2021-10-28 23:16:24,205 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 23:16:24,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:16:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 23:16:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-28 23:16:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-10-28 23:16:24,214 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 31 [2021-10-28 23:16:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:16:24,215 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-10-28 23:16:24,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:16:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-10-28 23:16:24,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:16:24,216 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:16:24,216 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-10-28 23:16:24,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:24,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:16:24,433 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:16:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:16:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash -553888196, now seen corresponding path program 5 times [2021-10-28 23:16:24,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:16:24,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740668386] [2021-10-28 23:16:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:16:24,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:16:24,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:16:24,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355831658] [2021-10-28 23:16:24,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:16:24,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:24,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:16:24,465 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:16:24,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:16:24,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:16:24,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-28 23:16:24,855 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:16:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:16:24,949 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:16:24,949 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:16:24,950 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:16:24,953 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:16:24,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:16:25,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:16:25,165 INFO L731 BasicCegarLoop]: Path program histogram: [5, 3, 3, 3, 2, 1, 1, 1] [2021-10-28 23:16:25,170 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:16:25,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:16:25 BoogieIcfgContainer [2021-10-28 23:16:25,237 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:16:25,237 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:16:25,237 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:16:25,238 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:16:25,238 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:16:05" (3/4) ... [2021-10-28 23:16:25,241 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:16:25,319 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:16:25,319 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:16:25,321 INFO L168 Benchmark]: Toolchain (without parser) took 21168.38 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 52.7 MB in the beginning and 48.1 MB in the end (delta: 4.5 MB). Peak memory consumption was 42.8 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:25,322 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory is still 69.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:16:25,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.17 ms. Allocated memory is still 94.4 MB. Free memory was 52.5 MB in the beginning and 64.7 MB in the end (delta: -12.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:25,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.02 ms. Allocated memory is still 94.4 MB. Free memory was 64.5 MB in the beginning and 63.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:25,324 INFO L168 Benchmark]: Boogie Preprocessor took 54.67 ms. Allocated memory is still 94.4 MB. Free memory was 63.1 MB in the beginning and 62.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:16:25,324 INFO L168 Benchmark]: RCFGBuilder took 384.13 ms. Allocated memory is still 94.4 MB. Free memory was 61.9 MB in the beginning and 52.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:25,325 INFO L168 Benchmark]: TraceAbstraction took 20184.03 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 51.8 MB in the beginning and 52.3 MB in the end (delta: -500.8 kB). Peak memory consumption was 43.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:25,326 INFO L168 Benchmark]: Witness Printer took 82.23 ms. Allocated memory is still 134.2 MB. Free memory was 52.3 MB in the beginning and 48.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:16:25,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory is still 69.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 392.17 ms. Allocated memory is still 94.4 MB. Free memory was 52.5 MB in the beginning and 64.7 MB in the end (delta: -12.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.02 ms. Allocated memory is still 94.4 MB. Free memory was 64.5 MB in the beginning and 63.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.67 ms. Allocated memory is still 94.4 MB. Free memory was 63.1 MB in the beginning and 62.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 384.13 ms. Allocated memory is still 94.4 MB. Free memory was 61.9 MB in the beginning and 52.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20184.03 ms. Allocated memory was 94.4 MB in the beginning and 134.2 MB in the end (delta: 39.8 MB). Free memory was 51.8 MB in the beginning and 52.3 MB in the end (delta: -500.8 kB). Peak memory consumption was 43.3 MB. Max. memory is 16.1 GB. * Witness Printer took 82.23 ms. Allocated memory is still 134.2 MB. Free memory was 52.3 MB in the beginning and 48.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0] [L31] EXPR counter++ VAL [counter=1] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x <= X)) VAL [counter=1] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=1] [L45] x++ VAL [counter=1] [L31] EXPR counter++ VAL [counter=2] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(x <= X)) VAL [counter=2] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=2] [L45] x++ VAL [counter=2] [L31] EXPR counter++ VAL [counter=3] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=3] [L35] COND FALSE !(!(x <= X)) VAL [counter=3] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=3] [L45] x++ VAL [counter=3] [L31] EXPR counter++ VAL [counter=4] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=4] [L35] COND FALSE !(!(x <= X)) VAL [counter=4] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=4] [L45] x++ VAL [counter=4] [L31] EXPR counter++ VAL [counter=5] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=5] [L35] COND FALSE !(!(x <= X)) VAL [counter=5] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [counter=5] [L45] x++ VAL [counter=5] [L31] EXPR counter++ VAL [counter=6] [L31] COND FALSE !(counter++<5) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=6] [L16] reach_error() VAL [counter=6] - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 19.9s, OverallIterations: 19, TraceHistogramMax: 6, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 239 SDtfs, 231 SDslu, 798 SDs, 0 SdLazy, 1200 SolverSat, 124 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 377 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=18, InterpolantAutomatonStates: 161, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 109 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 365 NumberOfCodeBlocks, 329 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 310 ConstructedInterpolants, 0 QuantifiedInterpolants, 2956 SizeOfPredicates, 147 NumberOfNonLiveVariables, 1713 ConjunctsInSsa, 346 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 82/250 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:16:25,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae819e40-705a-48d4-a9a2-27190767880d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...