./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array13_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array13_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro --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 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:17:59,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:17:59,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:17:59,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:17:59,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:17:59,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:17:59,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:17:59,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:17:59,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:17:59,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:17:59,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:17:59,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:17:59,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:17:59,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:17:59,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:17:59,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:17:59,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:17:59,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:17:59,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:17:59,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:17:59,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:17:59,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:17:59,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:17:59,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:17:59,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:17:59,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:17:59,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:17:59,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:17:59,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:17:59,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:17:59,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:17:59,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:17:59,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:17:59,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:17:59,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:17:59,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:17:59,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:17:59,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:17:59,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:17:59,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:17:59,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:17:59,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:17:59,676 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:17:59,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:17:59,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:17:59,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:17:59,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:17:59,679 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:17:59,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:17:59,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:17:59,681 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:17:59,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:17:59,681 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:17:59,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:17:59,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:17:59,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:17:59,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:17:59,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:17:59,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:17:59,684 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:17:59,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:17:59,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:17:59,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:17:59,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:17:59,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:17:59,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:17:59,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:17:59,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:17:59,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:17:59,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:17:59,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:17:59,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:17:59,688 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:17:59,688 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:17:59,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:17:59,689 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_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e [2022-11-18 20:18:00,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:18:00,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:18:00,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:18:00,054 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:18:00,055 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:18:00,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-patterns/array13_pattern.c [2022-11-18 20:18:00,168 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/data/0e1828190/60bc7bf6c9154447ade72b586616e61c/FLAG4e8b6d7e8 [2022-11-18 20:18:00,861 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:18:00,862 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/sv-benchmarks/c/array-patterns/array13_pattern.c [2022-11-18 20:18:00,870 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/data/0e1828190/60bc7bf6c9154447ade72b586616e61c/FLAG4e8b6d7e8 [2022-11-18 20:18:01,222 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/data/0e1828190/60bc7bf6c9154447ade72b586616e61c [2022-11-18 20:18:01,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:18:01,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:18:01,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:18:01,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:18:01,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:18:01,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22c859e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01, skipping insertion in model container [2022-11-18 20:18:01,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:18:01,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:18:01,564 WARN L234 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_dfc9b088-5a44-4802-8e2f-abebcd3406c4/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2022-11-18 20:18:01,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:18:01,620 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:18:01,642 WARN L234 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_dfc9b088-5a44-4802-8e2f-abebcd3406c4/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2022-11-18 20:18:01,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:18:01,686 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:18:01,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01 WrapperNode [2022-11-18 20:18:01,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:18:01,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:18:01,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:18:01,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:18:01,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,743 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2022-11-18 20:18:01,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:18:01,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:18:01,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:18:01,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:18:01,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,784 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:18:01,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:18:01,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:18:01,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:18:01,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01" (1/1) ... [2022-11-18 20:18:01,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:18:01,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:01,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:18:01,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:18:01,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:18:01,889 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 20:18:01,889 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 20:18:01,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:18:01,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:18:01,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:18:01,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:18:01,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:18:01,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:18:01,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:18:02,003 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:18:02,005 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:18:02,312 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:18:02,319 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:18:02,319 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-18 20:18:02,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:18:02 BoogieIcfgContainer [2022-11-18 20:18:02,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:18:02,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:18:02,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:18:02,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:18:02,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:18:01" (1/3) ... [2022-11-18 20:18:02,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3526fbc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:18:02, skipping insertion in model container [2022-11-18 20:18:02,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:01" (2/3) ... [2022-11-18 20:18:02,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3526fbc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:18:02, skipping insertion in model container [2022-11-18 20:18:02,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:18:02" (3/3) ... [2022-11-18 20:18:02,332 INFO L112 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2022-11-18 20:18:02,370 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:18:02,371 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:18:02,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:18:02,484 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@f5a8c8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:18:02,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:18:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:18:02,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:18:02,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:02,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:02,509 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:02,525 INFO L85 PathProgramCache]: Analyzing trace with hash -152131175, now seen corresponding path program 1 times [2022-11-18 20:18:02,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:02,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150275296] [2022-11-18 20:18:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:02,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:02,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:02,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150275296] [2022-11-18 20:18:02,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 20:18:02,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220083491] [2022-11-18 20:18:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:02,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:02,705 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:02,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:18:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:02,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 20:18:02,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:18:02,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:18:02,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220083491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:18:02,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:18:02,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:18:02,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628954655] [2022-11-18 20:18:02,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:18:02,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:18:02,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:02,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:18:02,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:18:02,935 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:18:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:02,973 INFO L93 Difference]: Finished difference Result 59 states and 91 transitions. [2022-11-18 20:18:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:18:02,977 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-18 20:18:02,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:02,984 INFO L225 Difference]: With dead ends: 59 [2022-11-18 20:18:02,985 INFO L226 Difference]: Without dead ends: 27 [2022-11-18 20:18:02,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:18:02,992 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:02,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:18:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-18 20:18:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-18 20:18:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:18:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-18 20:18:03,034 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 15 [2022-11-18 20:18:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:03,035 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-18 20:18:03,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:18:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-18 20:18:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:18:03,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:03,038 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:03,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:03,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:03,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:03,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2136147464, now seen corresponding path program 1 times [2022-11-18 20:18:03,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:03,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575190481] [2022-11-18 20:18:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:03,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:03,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:03,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919376637] [2022-11-18 20:18:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:03,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:03,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:03,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:03,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:18:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:03,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:18:03,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:18:03,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:18:03,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:03,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575190481] [2022-11-18 20:18:03,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:03,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919376637] [2022-11-18 20:18:03,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919376637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:18:03,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:18:03,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:18:03,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935328790] [2022-11-18 20:18:03,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:18:03,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:18:03,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:03,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:18:03,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:18:03,555 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:18:03,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:03,766 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2022-11-18 20:18:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:18:03,767 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-11-18 20:18:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:03,771 INFO L225 Difference]: With dead ends: 58 [2022-11-18 20:18:03,771 INFO L226 Difference]: Without dead ends: 39 [2022-11-18 20:18:03,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:18:03,775 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:03,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 56 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:18:03,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-18 20:18:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-11-18 20:18:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:18:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-18 20:18:03,786 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 28 [2022-11-18 20:18:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:03,786 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-18 20:18:03,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:18:03,787 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-18 20:18:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-18 20:18:03,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:03,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:03,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:03,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:03,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:03,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1984127527, now seen corresponding path program 1 times [2022-11-18 20:18:03,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:03,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995438356] [2022-11-18 20:18:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:03,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:04,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:04,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378365042] [2022-11-18 20:18:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:04,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:04,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:04,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:04,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:18:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:04,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:18:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:18:04,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:18:04,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:04,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995438356] [2022-11-18 20:18:04,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:04,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378365042] [2022-11-18 20:18:04,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378365042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:18:04,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:18:04,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:18:04,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951080051] [2022-11-18 20:18:04,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:18:04,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:18:04,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:18:04,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:18:04,154 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:18:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:04,217 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-11-18 20:18:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:18:04,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-18 20:18:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:04,219 INFO L225 Difference]: With dead ends: 61 [2022-11-18 20:18:04,219 INFO L226 Difference]: Without dead ends: 37 [2022-11-18 20:18:04,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:18:04,221 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:04,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 48 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:18:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-18 20:18:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-11-18 20:18:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:18:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-18 20:18:04,245 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 34 [2022-11-18 20:18:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:04,246 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-18 20:18:04,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:18:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-18 20:18:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 20:18:04,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:04,248 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:04,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:04,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:04,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:04,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1380575367, now seen corresponding path program 1 times [2022-11-18 20:18:04,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:04,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061627446] [2022-11-18 20:18:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:04,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:04,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:04,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204353811] [2022-11-18 20:18:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:04,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:04,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:04,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:18:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:04,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:18:04,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:18:04,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:18:05,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:05,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061627446] [2022-11-18 20:18:05,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:05,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204353811] [2022-11-18 20:18:05,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204353811] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:18:05,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:18:05,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-11-18 20:18:05,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227905572] [2022-11-18 20:18:05,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:18:05,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:18:05,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:05,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:18:05,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:18:05,361 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 18 states, 16 states have (on average 2.4375) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-18 20:18:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:06,057 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2022-11-18 20:18:06,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:18:06,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2022-11-18 20:18:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:06,061 INFO L225 Difference]: With dead ends: 129 [2022-11-18 20:18:06,061 INFO L226 Difference]: Without dead ends: 108 [2022-11-18 20:18:06,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:18:06,063 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 153 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:06,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 187 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:18:06,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-18 20:18:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 58. [2022-11-18 20:18:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:18:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-11-18 20:18:06,084 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 38 [2022-11-18 20:18:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:06,089 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-11-18 20:18:06,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-18 20:18:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-11-18 20:18:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 20:18:06,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:06,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:06,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:06,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:06,292 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:06,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1967381381, now seen corresponding path program 1 times [2022-11-18 20:18:06,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:06,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302914029] [2022-11-18 20:18:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:06,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:06,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:06,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980556552] [2022-11-18 20:18:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:06,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:06,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:06,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:06,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:18:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:06,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 20:18:06,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:06,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:18:07,147 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-18 20:18:07,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 27 [2022-11-18 20:18:07,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:18:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:18:07,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:07,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-11-18 20:18:07,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2022-11-18 20:18:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:18:07,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:07,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302914029] [2022-11-18 20:18:07,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:07,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980556552] [2022-11-18 20:18:07,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980556552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:18:07,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:18:07,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2022-11-18 20:18:07,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345236437] [2022-11-18 20:18:07,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:18:07,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:18:07,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:07,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:18:07,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:18:07,977 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 20:18:12,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:12,023 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2022-11-18 20:18:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:18:12,024 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2022-11-18 20:18:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:12,026 INFO L225 Difference]: With dead ends: 134 [2022-11-18 20:18:12,026 INFO L226 Difference]: Without dead ends: 128 [2022-11-18 20:18:12,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=554, Invalid=2202, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:18:12,029 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 223 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:12,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 265 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 523 Invalid, 0 Unknown, 108 Unchecked, 1.1s Time] [2022-11-18 20:18:12,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-18 20:18:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 100. [2022-11-18 20:18:12,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 84 states have internal predecessors, (100), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 20:18:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2022-11-18 20:18:12,089 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 38 [2022-11-18 20:18:12,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:12,090 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2022-11-18 20:18:12,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 20:18:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2022-11-18 20:18:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 20:18:12,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:12,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:12,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:12,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:12,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:12,310 INFO L85 PathProgramCache]: Analyzing trace with hash -707639139, now seen corresponding path program 2 times [2022-11-18 20:18:12,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:12,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7952349] [2022-11-18 20:18:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:12,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:12,330 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:12,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799391695] [2022-11-18 20:18:12,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:18:12,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:12,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:12,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:12,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:18:12,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:18:12,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:18:12,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:18:12,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:18:12,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:18:12,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:12,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7952349] [2022-11-18 20:18:12,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:12,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799391695] [2022-11-18 20:18:12,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799391695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:18:12,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:18:12,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-18 20:18:12,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747132871] [2022-11-18 20:18:12,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:18:12,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:18:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:12,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:18:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:18:12,633 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:18:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:12,919 INFO L93 Difference]: Finished difference Result 215 states and 261 transitions. [2022-11-18 20:18:12,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:18:12,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-11-18 20:18:12,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:12,922 INFO L225 Difference]: With dead ends: 215 [2022-11-18 20:18:12,922 INFO L226 Difference]: Without dead ends: 112 [2022-11-18 20:18:12,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:18:12,924 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 108 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:12,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 122 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:18:12,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-18 20:18:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 86. [2022-11-18 20:18:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 74 states have internal predecessors, (87), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 20:18:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2022-11-18 20:18:12,966 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 40 [2022-11-18 20:18:12,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:12,967 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2022-11-18 20:18:12,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:18:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2022-11-18 20:18:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 20:18:12,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:12,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:12,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:13,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:13,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash -291961609, now seen corresponding path program 2 times [2022-11-18 20:18:13,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:13,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820508333] [2022-11-18 20:18:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:13,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:13,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:13,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216134335] [2022-11-18 20:18:13,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:18:13,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:13,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:13,218 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:13,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:18:13,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:18:13,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:18:13,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:18:13,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:18:13,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:18:13,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820508333] [2022-11-18 20:18:13,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:13,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216134335] [2022-11-18 20:18:13,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216134335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:18:13,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:18:13,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-18 20:18:13,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124894353] [2022-11-18 20:18:13,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:18:13,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:18:13,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:13,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:18:13,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:18:13,480 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:18:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:13,759 INFO L93 Difference]: Finished difference Result 153 states and 190 transitions. [2022-11-18 20:18:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:18:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-11-18 20:18:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:13,761 INFO L225 Difference]: With dead ends: 153 [2022-11-18 20:18:13,762 INFO L226 Difference]: Without dead ends: 112 [2022-11-18 20:18:13,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:18:13,763 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:13,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 144 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:18:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-18 20:18:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 97. [2022-11-18 20:18:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 85 states have internal predecessors, (101), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 20:18:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2022-11-18 20:18:13,836 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 40 [2022-11-18 20:18:13,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:13,837 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2022-11-18 20:18:13,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:18:13,837 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2022-11-18 20:18:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 20:18:13,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:13,841 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:13,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:14,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:18:14,048 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:14,049 INFO L85 PathProgramCache]: Analyzing trace with hash 441313725, now seen corresponding path program 3 times [2022-11-18 20:18:14,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:14,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250619451] [2022-11-18 20:18:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:14,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:14,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:14,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666495194] [2022-11-18 20:18:14,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:18:14,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:14,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:14,067 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:14,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:18:14,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:18:14,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:18:14,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:18:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:18:14,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-18 20:18:14,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:14,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250619451] [2022-11-18 20:18:14,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:14,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666495194] [2022-11-18 20:18:14,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666495194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:18:14,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:18:14,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-11-18 20:18:14,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174306920] [2022-11-18 20:18:14,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:18:14,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:18:14,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:14,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:18:14,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:18:14,716 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 20:18:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:15,304 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2022-11-18 20:18:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:18:15,305 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 47 [2022-11-18 20:18:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:15,307 INFO L225 Difference]: With dead ends: 138 [2022-11-18 20:18:15,307 INFO L226 Difference]: Without dead ends: 134 [2022-11-18 20:18:15,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:18:15,308 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 97 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:15,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 151 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:18:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-18 20:18:15,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2022-11-18 20:18:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 76 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:18:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2022-11-18 20:18:15,349 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 47 [2022-11-18 20:18:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:15,349 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2022-11-18 20:18:15,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 15 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 20:18:15,350 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2022-11-18 20:18:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 20:18:15,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:15,351 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:15,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:15,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:15,558 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:15,559 INFO L85 PathProgramCache]: Analyzing trace with hash -166116396, now seen corresponding path program 3 times [2022-11-18 20:18:15,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:15,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094373151] [2022-11-18 20:18:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:15,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:15,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:15,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757890657] [2022-11-18 20:18:15,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:18:15,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:15,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:15,577 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:15,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:18:15,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:18:15,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:18:15,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:18:15,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-18 20:18:15,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-18 20:18:15,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:15,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094373151] [2022-11-18 20:18:15,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:15,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757890657] [2022-11-18 20:18:15,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757890657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:18:15,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:18:15,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-18 20:18:15,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119396846] [2022-11-18 20:18:15,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:18:15,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:18:15,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:15,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:18:15,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:18:15,834 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:18:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:16,019 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2022-11-18 20:18:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:18:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-11-18 20:18:16,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:16,023 INFO L225 Difference]: With dead ends: 97 [2022-11-18 20:18:16,023 INFO L226 Difference]: Without dead ends: 55 [2022-11-18 20:18:16,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:18:16,028 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:16,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 52 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:18:16,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-18 20:18:16,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-11-18 20:18:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:18:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-11-18 20:18:16,051 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 50 [2022-11-18 20:18:16,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:16,051 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-11-18 20:18:16,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:18:16,052 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-11-18 20:18:16,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-18 20:18:16,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:16,053 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:16,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:16,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:16,259 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:16,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:16,260 INFO L85 PathProgramCache]: Analyzing trace with hash -4709032, now seen corresponding path program 4 times [2022-11-18 20:18:16,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:16,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849305389] [2022-11-18 20:18:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:16,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:16,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:16,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297955557] [2022-11-18 20:18:16,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:18:16,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:16,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:16,276 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:16,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:18:16,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:18:16,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:18:16,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-18 20:18:16,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:16,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:18:16,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-11-18 20:18:17,214 INFO L321 Elim1Store]: treesize reduction 73, result has 30.5 percent of original size [2022-11-18 20:18:17,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 54 [2022-11-18 20:18:17,427 INFO L321 Elim1Store]: treesize reduction 81, result has 28.3 percent of original size [2022-11-18 20:18:17,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 68 [2022-11-18 20:18:18,904 INFO L321 Elim1Store]: treesize reduction 204, result has 12.4 percent of original size [2022-11-18 20:18:18,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 57 [2022-11-18 20:18:20,703 INFO L321 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2022-11-18 20:18:20,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 23 [2022-11-18 20:18:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:18:20,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:26,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:26,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849305389] [2022-11-18 20:18:26,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:18:26,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297955557] [2022-11-18 20:18:26,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297955557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:18:26,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:18:26,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-11-18 20:18:26,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966364733] [2022-11-18 20:18:26,546 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:18:26,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 20:18:26,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:26,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 20:18:26,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=2422, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:18:26,548 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 34 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:18:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:27,447 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2022-11-18 20:18:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:18:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 34 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2022-11-18 20:18:27,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:27,449 INFO L225 Difference]: With dead ends: 104 [2022-11-18 20:18:27,449 INFO L226 Difference]: Without dead ends: 100 [2022-11-18 20:18:27,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=366, Invalid=2604, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 20:18:27,452 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:27,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 258 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 258 Invalid, 0 Unknown, 164 Unchecked, 0.4s Time] [2022-11-18 20:18:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-18 20:18:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2022-11-18 20:18:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 79 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:18:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-11-18 20:18:27,493 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 56 [2022-11-18 20:18:27,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:27,494 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-11-18 20:18:27,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 34 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:18:27,494 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-11-18 20:18:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-18 20:18:27,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:27,495 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:27,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:18:27,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:27,703 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:27,704 INFO L85 PathProgramCache]: Analyzing trace with hash 214145686, now seen corresponding path program 4 times [2022-11-18 20:18:27,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:27,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088295068] [2022-11-18 20:18:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:27,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:27,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:18:27,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752263892] [2022-11-18 20:18:27,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:18:27,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:27,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:27,720 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:27,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc9b088-5a44-4802-8e2f-abebcd3406c4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:18:27,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:18:27,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:18:27,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-18 20:18:27,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:28,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:18:28,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-11-18 20:18:28,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:28,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:28,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:28,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:18:28,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-18 20:18:28,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:28,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:28,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:28,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:28,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:28,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:18:28,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 53 [2022-11-18 20:18:29,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:29,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:29,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:29,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:29,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:29,489 INFO L321 Elim1Store]: treesize reduction 221, result has 15.3 percent of original size [2022-11-18 20:18:29,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 73 treesize of output 68 [2022-11-18 20:18:30,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:30,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:30,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:30,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:18:30,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:18:30,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 16 [2022-11-18 20:18:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:18:30,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:36,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 234 [2022-11-18 20:18:37,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:18:37,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 11239950 treesize of output 10928696 [2022-11-18 20:19:04,952 WARN L233 SmtUtils]: Spent 27.92s on a formula simplification that was a NOOP. DAG size: 1028 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:19:46,683 WARN L233 SmtUtils]: Spent 27.86s on a formula simplification that was a NOOP. DAG size: 1019 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:20:18,527 WARN L233 SmtUtils]: Spent 16.16s on a formula simplification that was a NOOP. DAG size: 828 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:24:04,511 WARN L233 SmtUtils]: Spent 30.22s on a formula simplification that was a NOOP. DAG size: 1015 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:24:33,984 WARN L233 SmtUtils]: Spent 14.86s on a formula simplification that was a NOOP. DAG size: 789 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:28:01,816 WARN L233 SmtUtils]: Spent 12.37s on a formula simplification. DAG size of input: 983 DAG size of output: 983 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:28:30,360 WARN L233 SmtUtils]: Spent 12.30s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:28:45,273 WARN L233 SmtUtils]: Spent 10.32s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:28:58,465 WARN L233 SmtUtils]: Spent 9.31s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:29:10,389 WARN L233 SmtUtils]: Spent 9.97s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:29:35,110 WARN L233 SmtUtils]: Spent 21.03s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:29:52,223 WARN L233 SmtUtils]: Spent 15.17s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:30:04,468 WARN L233 SmtUtils]: Spent 10.23s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:30:16,863 WARN L233 SmtUtils]: Spent 10.37s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:30:38,426 WARN L233 SmtUtils]: Spent 9.87s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:30:49,709 WARN L233 SmtUtils]: Spent 9.47s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:31:02,059 WARN L233 SmtUtils]: Spent 10.50s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:31:15,399 WARN L233 SmtUtils]: Spent 10.77s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:31:39,302 WARN L233 SmtUtils]: Spent 21.80s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:31:50,558 WARN L233 SmtUtils]: Spent 9.33s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:32:04,364 WARN L233 SmtUtils]: Spent 10.95s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:32:16,576 WARN L233 SmtUtils]: Spent 10.33s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:32:29,976 WARN L233 SmtUtils]: Spent 9.83s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 20:32:47,955 WARN L233 SmtUtils]: Spent 9.63s on a formula simplification. DAG size of input: 792 DAG size of output: 792 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)