./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_3_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a --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 0c562931a6d05e325b28cce00e946abdf58c2b9fa526927c821e1aeeb79c8db9 --- 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-b5237d8 [2022-11-21 17:23:27,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:23:27,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:23:27,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:23:27,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:23:27,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:23:27,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:23:27,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:23:27,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:23:27,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:23:27,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:23:27,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:23:27,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:23:27,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:23:27,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:23:27,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:23:27,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:23:27,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:23:27,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:23:27,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:23:27,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:23:27,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:23:27,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:23:27,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:23:27,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:23:27,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:23:27,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:23:27,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:23:27,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:23:27,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:23:27,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:23:27,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:23:27,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:23:27,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:23:27,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:23:27,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:23:27,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:23:27,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:23:27,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:23:27,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:23:27,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:23:27,687 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 17:23:27,713 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:23:27,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:23:27,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:23:27,714 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:23:27,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:23:27,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:23:27,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:23:27,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:23:27,736 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:23:27,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:23:27,737 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:23:27,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:23:27,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:23:27,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:23:27,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:23:27,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:23:27,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:23:27,738 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:23:27,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:23:27,739 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:23:27,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:23:27,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:23:27,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:23:27,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:23:27,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:23:27,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:23:27,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:23:27,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:23:27,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:23:27,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:23:27,742 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:23:27,742 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:23:27,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:23:27,743 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_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c562931a6d05e325b28cce00e946abdf58c2b9fa526927c821e1aeeb79c8db9 [2022-11-21 17:23:28,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:23:28,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:23:28,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:23:28,146 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:23:28,147 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:23:28,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/combinations/gcd_4+newton_3_5.i [2022-11-21 17:23:31,429 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:23:31,770 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:23:31,772 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i [2022-11-21 17:23:31,783 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/data/357f92fee/580c6eb2e01046128e00ff2c621a9522/FLAGcfc075061 [2022-11-21 17:23:32,081 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/data/357f92fee/580c6eb2e01046128e00ff2c621a9522 [2022-11-21 17:23:32,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:23:32,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:23:32,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:23:32,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:23:32,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:23:32,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2652989a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32, skipping insertion in model container [2022-11-21 17:23:32,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:23:32,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:23:32,394 WARN L237 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_c283bdb8-9a2b-4314-94d1-30b3da413558/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[1224,1237] [2022-11-21 17:23:32,438 WARN L237 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_c283bdb8-9a2b-4314-94d1-30b3da413558/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[2848,2861] [2022-11-21 17:23:32,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:23:32,451 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:23:32,466 WARN L237 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_c283bdb8-9a2b-4314-94d1-30b3da413558/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[1224,1237] [2022-11-21 17:23:32,476 WARN L237 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_c283bdb8-9a2b-4314-94d1-30b3da413558/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[2848,2861] [2022-11-21 17:23:32,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:23:32,493 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:23:32,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32 WrapperNode [2022-11-21 17:23:32,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:23:32,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:23:32,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:23:32,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:23:32,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,546 INFO L138 Inliner]: procedures = 27, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 85 [2022-11-21 17:23:32,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:23:32,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:23:32,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:23:32,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:23:32,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,575 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:23:32,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:23:32,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:23:32,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:23:32,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32" (1/1) ... [2022-11-21 17:23:32,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:23:32,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:23:32,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:23:32,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:23:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:23:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-21 17:23:32,673 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-21 17:23:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-21 17:23:32,677 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-21 17:23:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:23:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:23:32,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:23:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-21 17:23:32,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-21 17:23:32,779 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:23:32,782 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:23:33,032 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:23:33,053 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:23:33,059 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 17:23:33,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:23:33 BoogieIcfgContainer [2022-11-21 17:23:33,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:23:33,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:23:33,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:23:33,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:23:33,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:23:32" (1/3) ... [2022-11-21 17:23:33,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a411080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:23:33, skipping insertion in model container [2022-11-21 17:23:33,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:32" (2/3) ... [2022-11-21 17:23:33,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a411080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:23:33, skipping insertion in model container [2022-11-21 17:23:33,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:23:33" (3/3) ... [2022-11-21 17:23:33,086 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_5.i [2022-11-21 17:23:33,110 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:23:33,111 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 17:23:33,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:23:33,195 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;@d02bb62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:23:33,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 17:23:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 17:23:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 17:23:33,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:33,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:33,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:33,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-11-21 17:23:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:23:33,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067714926] [2022-11-21 17:23:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:33,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:23:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:33,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:23:33,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067714926] [2022-11-21 17:23:33,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 17:23:33,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118615469] [2022-11-21 17:23:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:33,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:33,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:23:33,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:23:33,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:23:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:33,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 17:23:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:33,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:33,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118615469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:33,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:33,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:23:33,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394940589] [2022-11-21 17:23:33,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:33,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:23:33,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:23:33,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:23:33,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:23:33,770 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:33,866 INFO L93 Difference]: Finished difference Result 97 states and 134 transitions. [2022-11-21 17:23:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:23:33,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-21 17:23:33,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:33,882 INFO L225 Difference]: With dead ends: 97 [2022-11-21 17:23:33,882 INFO L226 Difference]: Without dead ends: 45 [2022-11-21 17:23:33,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:23:33,895 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:33,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 100 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:23:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-21 17:23:33,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-11-21 17:23:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 17:23:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-11-21 17:23:33,955 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 11 [2022-11-21 17:23:33,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:33,956 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-11-21 17:23:33,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:33,959 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-11-21 17:23:33,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 17:23:33,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:33,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:33,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:23:34,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:34,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:34,167 INFO L85 PathProgramCache]: Analyzing trace with hash -5379846, now seen corresponding path program 1 times [2022-11-21 17:23:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:23:34,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527540729] [2022-11-21 17:23:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:34,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:23:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:34,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:23:34,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527540729] [2022-11-21 17:23:34,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 17:23:34,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212722325] [2022-11-21 17:23:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:34,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:34,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:23:34,234 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:23:34,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 17:23:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:34,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 17:23:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:34,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:34,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212722325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:34,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:34,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:23:34,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841604948] [2022-11-21 17:23:34,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:34,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:23:34,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:23:34,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:23:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:23:34,371 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:34,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:34,411 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-11-21 17:23:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:23:34,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-21 17:23:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:34,416 INFO L225 Difference]: With dead ends: 67 [2022-11-21 17:23:34,417 INFO L226 Difference]: Without dead ends: 50 [2022-11-21 17:23:34,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:23:34,420 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:34,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 82 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:23:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-21 17:23:34,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-11-21 17:23:34,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 17:23:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-11-21 17:23:34,434 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 11 [2022-11-21 17:23:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:34,435 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-11-21 17:23:34,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-11-21 17:23:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 17:23:34,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:34,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:34,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 17:23:34,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-21 17:23:34,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:34,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:34,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-11-21 17:23:34,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:23:34,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446643164] [2022-11-21 17:23:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:34,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:23:34,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:23:34,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887413288] [2022-11-21 17:23:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:34,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:34,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:23:34,710 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:23:34,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 17:23:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:34,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 17:23:34,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:34,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:34,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:23:34,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446643164] [2022-11-21 17:23:34,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:23:34,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887413288] [2022-11-21 17:23:34,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887413288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:34,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:34,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:23:34,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795074641] [2022-11-21 17:23:34,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:23:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:23:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:23:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:23:34,899 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:34,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:34,937 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-21 17:23:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:23:34,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-21 17:23:34,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:34,941 INFO L225 Difference]: With dead ends: 56 [2022-11-21 17:23:34,942 INFO L226 Difference]: Without dead ends: 43 [2022-11-21 17:23:34,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:23:34,944 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:34,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:23:34,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-21 17:23:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-21 17:23:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 17:23:34,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-21 17:23:34,953 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2022-11-21 17:23:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:34,953 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-21 17:23:34,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-21 17:23:34,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 17:23:34,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:34,958 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:34,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 17:23:35,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:35,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2022-11-21 17:23:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:23:35,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528276291] [2022-11-21 17:23:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:35,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:23:35,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:23:35,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752016270] [2022-11-21 17:23:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:35,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:35,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:23:35,190 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:23:35,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 17:23:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:35,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 17:23:35,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:35,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:23:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:35,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:23:35,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528276291] [2022-11-21 17:23:35,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:23:35,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752016270] [2022-11-21 17:23:35,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752016270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:23:35,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:23:35,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-21 17:23:35,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594428642] [2022-11-21 17:23:35,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:23:35,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:23:35,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:23:35,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:23:35,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:23:35,434 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:35,491 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-11-21 17:23:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:23:35,492 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-21 17:23:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:35,494 INFO L225 Difference]: With dead ends: 60 [2022-11-21 17:23:35,494 INFO L226 Difference]: Without dead ends: 47 [2022-11-21 17:23:35,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:23:35,496 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:35,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 152 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:23:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-21 17:23:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-21 17:23:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 17:23:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-21 17:23:35,508 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2022-11-21 17:23:35,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:35,509 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-21 17:23:35,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:35,510 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-21 17:23:35,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 17:23:35,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:35,511 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:35,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 17:23:35,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:35,719 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:35,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:35,719 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2022-11-21 17:23:35,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:23:35,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995753118] [2022-11-21 17:23:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:35,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:23:35,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:23:35,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049503851] [2022-11-21 17:23:35,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:23:35,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:35,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:23:35,759 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:23:35,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 17:23:35,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:23:35,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:23:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 17:23:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:36,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:23:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:36,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:23:36,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995753118] [2022-11-21 17:23:36,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:23:36,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049503851] [2022-11-21 17:23:36,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049503851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:23:36,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:23:36,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-21 17:23:36,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082589523] [2022-11-21 17:23:36,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:23:36,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:23:36,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:23:36,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:23:36,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:23:36,167 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:36,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:36,317 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-11-21 17:23:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 17:23:36,321 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-21 17:23:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:36,322 INFO L225 Difference]: With dead ends: 68 [2022-11-21 17:23:36,322 INFO L226 Difference]: Without dead ends: 53 [2022-11-21 17:23:36,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-11-21 17:23:36,324 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:36,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 226 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:23:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-21 17:23:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-21 17:23:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 17:23:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-11-21 17:23:36,334 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 21 [2022-11-21 17:23:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:36,334 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-11-21 17:23:36,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-11-21 17:23:36,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 17:23:36,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:36,336 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:36,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-21 17:23:36,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:36,542 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:36,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:36,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1120707465, now seen corresponding path program 3 times [2022-11-21 17:23:36,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:23:36,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203396384] [2022-11-21 17:23:36,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:36,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:23:36,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:23:36,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848163584] [2022-11-21 17:23:36,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:23:36,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:36,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:23:36,571 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:23:36,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 17:23:36,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 17:23:36,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:23:36,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 17:23:36,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 17:23:36,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:23:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 17:23:37,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:23:37,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203396384] [2022-11-21 17:23:37,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:23:37,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848163584] [2022-11-21 17:23:37,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848163584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:23:37,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:23:37,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-21 17:23:37,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611868789] [2022-11-21 17:23:37,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:23:37,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 17:23:37,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:23:37,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 17:23:37,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:23:37,416 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:38,219 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2022-11-21 17:23:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 17:23:38,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-21 17:23:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:38,223 INFO L225 Difference]: With dead ends: 81 [2022-11-21 17:23:38,223 INFO L226 Difference]: Without dead ends: 78 [2022-11-21 17:23:38,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-11-21 17:23:38,225 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:38,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 495 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 17:23:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-21 17:23:38,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2022-11-21 17:23:38,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 states have internal predecessors, (64), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 17:23:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-11-21 17:23:38,238 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 23 [2022-11-21 17:23:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:38,239 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-11-21 17:23:38,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-11-21 17:23:38,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 17:23:38,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:38,240 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:38,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 17:23:38,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 17:23:38,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash 469106930, now seen corresponding path program 4 times [2022-11-21 17:23:38,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:23:38,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628040971] [2022-11-21 17:23:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:38,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:23:38,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:23:38,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648088051] [2022-11-21 17:23:38,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 17:23:38,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:38,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:23:38,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:23:38,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 17:23:38,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 17:23:38,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:23:38,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 17:23:38,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:38,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:23:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:38,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:23:38,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628040971] [2022-11-21 17:23:38,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:23:38,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648088051] [2022-11-21 17:23:38,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648088051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:23:38,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:23:38,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-21 17:23:38,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351074983] [2022-11-21 17:23:38,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:23:38,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 17:23:38,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:23:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 17:23:38,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-21 17:23:38,881 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:39,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:39,130 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2022-11-21 17:23:39,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 17:23:39,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-21 17:23:39,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:39,133 INFO L225 Difference]: With dead ends: 94 [2022-11-21 17:23:39,133 INFO L226 Difference]: Without dead ends: 66 [2022-11-21 17:23:39,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-11-21 17:23:39,140 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:39,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 411 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:23:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-21 17:23:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-21 17:23:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 17:23:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-11-21 17:23:39,167 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 25 [2022-11-21 17:23:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:39,169 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-11-21 17:23:39,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-11-21 17:23:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 17:23:39,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:39,174 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:39,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 17:23:39,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:39,382 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:39,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:39,382 INFO L85 PathProgramCache]: Analyzing trace with hash -985782289, now seen corresponding path program 5 times [2022-11-21 17:23:39,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:23:39,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165856733] [2022-11-21 17:23:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:39,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:23:39,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:23:39,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936141670] [2022-11-21 17:23:39,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 17:23:39,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:39,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:23:39,401 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:23:39,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 17:23:39,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-21 17:23:39,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:23:39,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 17:23:39,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:39,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:23:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:39,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:23:39,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165856733] [2022-11-21 17:23:39,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:23:39,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936141670] [2022-11-21 17:23:39,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936141670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:23:39,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:23:39,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-21 17:23:39,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861199953] [2022-11-21 17:23:39,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:23:39,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 17:23:39,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:23:39,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 17:23:39,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:23:39,897 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:40,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:40,012 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2022-11-21 17:23:40,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:23:40,013 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-21 17:23:40,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:40,014 INFO L225 Difference]: With dead ends: 76 [2022-11-21 17:23:40,014 INFO L226 Difference]: Without dead ends: 49 [2022-11-21 17:23:40,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:23:40,015 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:40,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 354 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:23:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-21 17:23:40,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-21 17:23:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-21 17:23:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-11-21 17:23:40,025 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2022-11-21 17:23:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:40,026 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-11-21 17:23:40,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:40,026 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-11-21 17:23:40,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 17:23:40,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:40,028 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:40,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 17:23:40,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:40,240 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:40,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2022-11-21 17:23:40,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:23:40,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460143333] [2022-11-21 17:23:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:40,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:23:40,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:23:40,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500049838] [2022-11-21 17:23:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:40,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:40,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:23:40,273 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:23:40,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 17:23:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:40,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 17:23:40,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:23:40,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:23:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:23:41,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:23:41,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460143333] [2022-11-21 17:23:41,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:23:41,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500049838] [2022-11-21 17:23:41,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500049838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:23:41,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:23:41,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-21 17:23:41,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765475095] [2022-11-21 17:23:41,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:23:41,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 17:23:41,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:23:41,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 17:23:41,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:23:41,007 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:23:42,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:42,405 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-11-21 17:23:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 17:23:42,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-21 17:23:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:42,406 INFO L225 Difference]: With dead ends: 49 [2022-11-21 17:23:42,406 INFO L226 Difference]: Without dead ends: 23 [2022-11-21 17:23:42,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-11-21 17:23:42,407 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:42,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 419 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 17:23:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-21 17:23:42,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-21 17:23:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 17:23:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-21 17:23:42,411 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-11-21 17:23:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:42,411 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-21 17:23:42,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:23:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-21 17:23:42,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-21 17:23:42,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:42,412 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-21 17:23:42,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 17:23:42,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:23:42,613 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:42,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:42,613 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-11-21 17:23:42,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:23:42,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191354424] [2022-11-21 17:23:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:42,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:23:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:23:42,651 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 17:23:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:23:42,701 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 17:23:42,701 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 17:23:42,703 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-21 17:23:42,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-21 17:23:42,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 17:23:42,709 INFO L444 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1] [2022-11-21 17:23:42,714 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-21 17:23:42,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 05:23:42 BoogieIcfgContainer [2022-11-21 17:23:42,758 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-21 17:23:42,759 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 17:23:42,759 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 17:23:42,760 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 17:23:42,760 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:23:33" (3/4) ... [2022-11-21 17:23:42,764 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-21 17:23:42,764 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 17:23:42,764 INFO L158 Benchmark]: Toolchain (without parser) took 10675.07ms. Allocated memory was 142.6MB in the beginning and 192.9MB in the end (delta: 50.3MB). Free memory was 108.9MB in the beginning and 125.7MB in the end (delta: -16.8MB). Peak memory consumption was 36.4MB. Max. memory is 16.1GB. [2022-11-21 17:23:42,765 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 142.6MB. Free memory is still 111.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 17:23:42,766 INFO L158 Benchmark]: CACSL2BoogieTranslator took 400.51ms. Allocated memory is still 142.6MB. Free memory was 108.9MB in the beginning and 97.6MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-21 17:23:42,766 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.41ms. Allocated memory is still 142.6MB. Free memory was 97.6MB in the beginning and 95.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 17:23:42,767 INFO L158 Benchmark]: Boogie Preprocessor took 31.04ms. Allocated memory is still 142.6MB. Free memory was 95.6MB in the beginning and 94.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 17:23:42,767 INFO L158 Benchmark]: RCFGBuilder took 482.81ms. Allocated memory is still 142.6MB. Free memory was 94.3MB in the beginning and 82.1MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-21 17:23:42,768 INFO L158 Benchmark]: TraceAbstraction took 9694.24ms. Allocated memory was 142.6MB in the beginning and 192.9MB in the end (delta: 50.3MB). Free memory was 81.4MB in the beginning and 125.7MB in the end (delta: -44.3MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. [2022-11-21 17:23:42,769 INFO L158 Benchmark]: Witness Printer took 4.76ms. Allocated memory is still 192.9MB. Free memory is still 125.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 17:23:42,771 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 142.6MB. Free memory is still 111.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 400.51ms. Allocated memory is still 142.6MB. Free memory was 108.9MB in the beginning and 97.6MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.41ms. Allocated memory is still 142.6MB. Free memory was 97.6MB in the beginning and 95.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.04ms. Allocated memory is still 142.6MB. Free memory was 95.6MB in the beginning and 94.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 482.81ms. Allocated memory is still 142.6MB. Free memory was 94.3MB in the beginning and 82.1MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9694.24ms. Allocated memory was 142.6MB in the beginning and 192.9MB in the end (delta: 50.3MB). Free memory was 81.4MB in the beginning and 125.7MB in the end (delta: -44.3MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. * Witness Printer took 4.76ms. Allocated memory is still 192.9MB. Free memory is still 125.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -1.0f && IN < 1.0f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -1.0f && IN < 1.0f) [L100] CALL, EXPR f(IN) VAL [\old(x)=116] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=116, x=116] [L100] RET, EXPR f(IN) VAL [f(IN)=110, IN=116] [L100] CALL, EXPR fp(IN) VAL [\old(x)=116] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=116, x=116] [L100] RET, EXPR fp(IN) VAL [f(IN)=110, fp(IN)=109, IN=116] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=111] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=111, x=111] [L102] RET, EXPR f(x) VAL [f(x)=117, IN=116, x=111] [L102] CALL, EXPR fp(x) VAL [\old(x)=111] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=111, x=111] [L102] RET, EXPR fp(x) VAL [f(x)=117, fp(x)=112, IN=116, x=111] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=114] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=114, x=114] [L104] RET, EXPR f(x) VAL [f(x)=113, IN=116, x=114] [L104] CALL, EXPR fp(x) VAL [\old(x)=114] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=114, x=114] [L104] RET, EXPR fp(x) VAL [f(x)=113, fp(x)=115, IN=116, x=114] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=116] [L109] reach_error() VAL [IN=116] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 9.6s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 135 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 127 mSDsluCounter, 2317 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1948 mSDsCounter, 98 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 903 IncrementalHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 98 mSolverCounterUnsat, 369 mSDtfsCounter, 903 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 328 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 234 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 304 ConstructedInterpolants, 0 QuantifiedInterpolants, 1589 SizeOfPredicates, 41 NumberOfNonLiveVariables, 809 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 67/315 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-21 17:23:42,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a --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 0c562931a6d05e325b28cce00e946abdf58c2b9fa526927c821e1aeeb79c8db9 --- 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-b5237d8 [2022-11-21 17:23:45,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:23:45,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:23:45,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:23:45,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:23:45,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:23:45,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:23:45,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:23:45,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:23:45,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:23:45,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:23:45,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:23:45,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:23:45,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:23:45,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:23:45,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:23:45,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:23:45,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:23:45,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:23:45,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:23:45,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:23:46,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:23:46,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:23:46,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:23:46,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:23:46,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:23:46,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:23:46,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:23:46,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:23:46,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:23:46,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:23:46,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:23:46,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:23:46,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:23:46,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:23:46,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:23:46,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:23:46,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:23:46,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:23:46,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:23:46,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:23:46,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-21 17:23:46,093 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:23:46,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:23:46,096 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:23:46,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:23:46,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:23:46,097 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:23:46,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:23:46,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:23:46,099 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:23:46,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:23:46,100 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:23:46,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:23:46,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:23:46,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:23:46,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:23:46,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:23:46,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 17:23:46,102 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-21 17:23:46,102 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-21 17:23:46,102 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:23:46,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:23:46,103 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:23:46,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:23:46,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:23:46,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:23:46,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:23:46,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:23:46,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:23:46,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:23:46,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:23:46,105 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-21 17:23:46,106 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-21 17:23:46,106 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:23:46,106 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:23:46,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:23:46,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-21 17:23:46,107 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c562931a6d05e325b28cce00e946abdf58c2b9fa526927c821e1aeeb79c8db9 [2022-11-21 17:23:46,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:23:46,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:23:46,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:23:46,596 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:23:46,597 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:23:46,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/combinations/gcd_4+newton_3_5.i [2022-11-21 17:23:49,846 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:23:50,140 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:23:50,141 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i [2022-11-21 17:23:50,149 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/data/9da2f1e92/ce618bb2274d40f69e6f4d3a0d397af6/FLAG2a45c8e83 [2022-11-21 17:23:50,183 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/data/9da2f1e92/ce618bb2274d40f69e6f4d3a0d397af6 [2022-11-21 17:23:50,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:23:50,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:23:50,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:23:50,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:23:50,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:23:50,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eda94c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50, skipping insertion in model container [2022-11-21 17:23:50,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:23:50,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:23:50,506 WARN L237 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_c283bdb8-9a2b-4314-94d1-30b3da413558/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[1224,1237] [2022-11-21 17:23:50,570 WARN L237 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_c283bdb8-9a2b-4314-94d1-30b3da413558/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[2848,2861] [2022-11-21 17:23:50,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:23:50,597 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:23:50,627 WARN L237 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_c283bdb8-9a2b-4314-94d1-30b3da413558/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[1224,1237] [2022-11-21 17:23:50,657 WARN L237 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_c283bdb8-9a2b-4314-94d1-30b3da413558/sv-benchmarks/c/combinations/gcd_4+newton_3_5.i[2848,2861] [2022-11-21 17:23:50,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:23:50,679 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:23:50,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50 WrapperNode [2022-11-21 17:23:50,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:23:50,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:23:50,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:23:50,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:23:50,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,763 INFO L138 Inliner]: procedures = 28, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 82 [2022-11-21 17:23:50,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:23:50,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:23:50,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:23:50,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:23:50,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,823 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:23:50,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:23:50,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:23:50,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:23:50,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50" (1/1) ... [2022-11-21 17:23:50,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:23:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:23:50,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:23:50,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:23:50,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:23:50,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-21 17:23:50,953 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-21 17:23:50,954 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-21 17:23:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-21 17:23:50,954 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-21 17:23:50,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:23:50,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:23:50,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-21 17:23:50,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-21 17:23:51,084 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:23:51,086 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:23:58,132 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:23:58,140 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:23:58,141 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 17:23:58,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:23:58 BoogieIcfgContainer [2022-11-21 17:23:58,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:23:58,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:23:58,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:23:58,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:23:58,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:23:50" (1/3) ... [2022-11-21 17:23:58,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a86746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:23:58, skipping insertion in model container [2022-11-21 17:23:58,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:23:50" (2/3) ... [2022-11-21 17:23:58,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17a86746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:23:58, skipping insertion in model container [2022-11-21 17:23:58,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:23:58" (3/3) ... [2022-11-21 17:23:58,153 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_5.i [2022-11-21 17:23:58,174 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:23:58,174 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 17:23:58,226 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:23:58,234 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;@d2a1b0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:23:58,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 17:23:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 17:23:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 17:23:58,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:58,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:58,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-11-21 17:23:58,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:23:58,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318113223] [2022-11-21 17:23:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:58,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:58,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:23:58,282 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:23:58,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-21 17:23:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:58,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 17:23:58,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:58,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:58,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:23:58,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318113223] [2022-11-21 17:23:58,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318113223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:58,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:58,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:23:58,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893114111] [2022-11-21 17:23:58,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:58,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:23:58,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:23:58,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:23:58,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:23:58,683 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:58,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:58,795 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-11-21 17:23:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:23:58,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-21 17:23:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:58,808 INFO L225 Difference]: With dead ends: 99 [2022-11-21 17:23:58,808 INFO L226 Difference]: Without dead ends: 46 [2022-11-21 17:23:58,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:23:58,816 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:58,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:23:58,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-21 17:23:58,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-11-21 17:23:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 17:23:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-21 17:23:58,882 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2022-11-21 17:23:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:58,884 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-21 17:23:58,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-21 17:23:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 17:23:58,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:58,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:58,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:23:59,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:59,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2022-11-21 17:23:59,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:23:59,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683133432] [2022-11-21 17:23:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:59,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:59,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:23:59,135 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:23:59,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-21 17:23:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:59,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 17:23:59,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:59,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:59,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:23:59,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683133432] [2022-11-21 17:23:59,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683133432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:59,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:59,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:23:59,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397067799] [2022-11-21 17:23:59,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:59,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:23:59,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:23:59,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:23:59,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:23:59,343 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:59,437 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-11-21 17:23:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:23:59,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 17:23:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:59,440 INFO L225 Difference]: With dead ends: 55 [2022-11-21 17:23:59,441 INFO L226 Difference]: Without dead ends: 41 [2022-11-21 17:23:59,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:23:59,443 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:59,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:23:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-21 17:23:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-21 17:23:59,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 17:23:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-11-21 17:23:59,454 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2022-11-21 17:23:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:59,454 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-11-21 17:23:59,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:59,455 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-11-21 17:23:59,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 17:23:59,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:59,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:59,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-21 17:23:59,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:59,674 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:23:59,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:59,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-11-21 17:23:59,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:23:59,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790739261] [2022-11-21 17:23:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:59,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:59,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:23:59,680 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:23:59,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-21 17:23:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:59,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 17:23:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:24:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:24:00,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:24:00,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:24:00,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790739261] [2022-11-21 17:24:00,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790739261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:24:00,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:24:00,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:24:00,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161434671] [2022-11-21 17:24:00,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:24:00,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:24:00,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:24:00,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:24:00,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:24:00,056 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:24:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:24:00,170 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-21 17:24:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:24:00,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-21 17:24:00,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:24:00,172 INFO L225 Difference]: With dead ends: 56 [2022-11-21 17:24:00,174 INFO L226 Difference]: Without dead ends: 43 [2022-11-21 17:24:00,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:24:00,192 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:24:00,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:24:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-21 17:24:00,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-21 17:24:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 17:24:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-21 17:24:00,211 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2022-11-21 17:24:00,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:24:00,212 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-21 17:24:00,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:24:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-21 17:24:00,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 17:24:00,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:24:00,214 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:24:00,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-21 17:24:00,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:24:00,433 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:24:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:24:00,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2022-11-21 17:24:00,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:24:00,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92520997] [2022-11-21 17:24:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:24:00,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:24:00,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:24:00,438 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:24:00,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-21 17:24:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:24:00,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 17:24:00,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:24:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:24:00,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:24:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:24:01,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:24:01,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92520997] [2022-11-21 17:24:01,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92520997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:24:01,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:24:01,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-21 17:24:01,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313368459] [2022-11-21 17:24:01,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:24:01,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:24:01,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:24:01,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:24:01,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:24:01,250 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:24:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:24:01,480 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-11-21 17:24:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:24:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-21 17:24:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:24:01,483 INFO L225 Difference]: With dead ends: 60 [2022-11-21 17:24:01,483 INFO L226 Difference]: Without dead ends: 47 [2022-11-21 17:24:01,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:24:01,485 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:24:01,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:24:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-21 17:24:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-21 17:24:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 17:24:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-21 17:24:01,496 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2022-11-21 17:24:01,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:24:01,496 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-21 17:24:01,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:24:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-21 17:24:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 17:24:01,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:24:01,498 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:24:01,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-21 17:24:01,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:24:01,706 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:24:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:24:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2022-11-21 17:24:01,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:24:01,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321475940] [2022-11-21 17:24:01,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:24:01,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:24:01,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:24:01,710 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:24:01,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-21 17:24:01,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:24:01,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:24:01,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 17:24:01,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:24:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:24:03,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:24:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:24:11,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:24:11,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321475940] [2022-11-21 17:24:11,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321475940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:24:11,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:24:11,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-21 17:24:11,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596305490] [2022-11-21 17:24:11,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:24:11,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 17:24:11,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:24:11,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 17:24:11,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:24:11,784 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:24:48,155 WARN L233 SmtUtils]: Spent 9.57s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:25:03,731 WARN L233 SmtUtils]: Spent 10.69s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:25:09,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:25:09,297 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2022-11-21 17:25:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 17:25:09,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-21 17:25:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:25:09,340 INFO L225 Difference]: With dead ends: 71 [2022-11-21 17:25:09,340 INFO L226 Difference]: Without dead ends: 68 [2022-11-21 17:25:09,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 54.9s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-11-21 17:25:09,342 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:25:09,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 406 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-11-21 17:25:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-21 17:25:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-11-21 17:25:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 17:25:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-11-21 17:25:09,362 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2022-11-21 17:25:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:25:09,362 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-11-21 17:25:09,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:25:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-11-21 17:25:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 17:25:09,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:25:09,364 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:25:09,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-21 17:25:09,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:25:09,570 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:25:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:25:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash -311360839, now seen corresponding path program 3 times [2022-11-21 17:25:09,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:25:09,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410378378] [2022-11-21 17:25:09,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:25:09,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:25:09,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:25:09,573 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:25:09,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-21 17:25:09,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 17:25:09,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:25:09,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-21 17:25:09,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:25:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 17:25:09,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:25:09,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:25:09,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410378378] [2022-11-21 17:25:09,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410378378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:25:09,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:25:09,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:25:09,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720298770] [2022-11-21 17:25:09,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:25:09,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:25:09,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:25:09,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:25:09,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:25:09,741 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:25:09,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:25:09,806 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2022-11-21 17:25:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:25:09,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-21 17:25:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:25:09,809 INFO L225 Difference]: With dead ends: 78 [2022-11-21 17:25:09,809 INFO L226 Difference]: Without dead ends: 67 [2022-11-21 17:25:09,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:25:09,811 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:25:09,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:25:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-21 17:25:09,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-11-21 17:25:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 17:25:09,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-11-21 17:25:09,844 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 23 [2022-11-21 17:25:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:25:09,848 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-11-21 17:25:09,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:25:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-11-21 17:25:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 17:25:09,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:25:09,855 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:25:09,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-21 17:25:10,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:25:10,070 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:25:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:25:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash 603968502, now seen corresponding path program 4 times [2022-11-21 17:25:10,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:25:10,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721111304] [2022-11-21 17:25:10,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 17:25:10,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:25:10,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:25:10,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:25:10,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-21 17:25:10,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 17:25:10,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:25:10,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 17:25:10,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:25:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:25:10,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:25:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:25:11,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:25:11,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721111304] [2022-11-21 17:25:11,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721111304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:25:11,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:25:11,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-21 17:25:11,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776907452] [2022-11-21 17:25:11,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:25:11,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 17:25:11,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:25:11,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 17:25:11,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:25:11,644 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:25:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:25:12,718 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-11-21 17:25:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:25:12,730 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-21 17:25:12,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:25:12,731 INFO L225 Difference]: With dead ends: 88 [2022-11-21 17:25:12,731 INFO L226 Difference]: Without dead ends: 64 [2022-11-21 17:25:12,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-21 17:25:12,732 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 17:25:12,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 263 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 17:25:12,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-21 17:25:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-11-21 17:25:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 17:25:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-11-21 17:25:12,756 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 25 [2022-11-21 17:25:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:25:12,757 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-11-21 17:25:12,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:25:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-11-21 17:25:12,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 17:25:12,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:25:12,762 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:25:12,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-21 17:25:12,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:25:12,979 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:25:12,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:25:12,980 INFO L85 PathProgramCache]: Analyzing trace with hash 225362363, now seen corresponding path program 1 times [2022-11-21 17:25:12,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:25:12,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770638485] [2022-11-21 17:25:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:25:12,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:25:12,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:25:12,982 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:25:12,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-21 17:25:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:25:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 17:25:13,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:25:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:25:13,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:25:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:25:14,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:25:14,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770638485] [2022-11-21 17:25:14,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770638485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:25:14,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:25:14,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-21 17:25:14,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806694306] [2022-11-21 17:25:14,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:25:14,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:25:14,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:25:14,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:25:14,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:25:14,717 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 17:25:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:25:16,470 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2022-11-21 17:25:16,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 17:25:16,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-21 17:25:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:25:16,484 INFO L225 Difference]: With dead ends: 91 [2022-11-21 17:25:16,484 INFO L226 Difference]: Without dead ends: 72 [2022-11-21 17:25:16,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:25:16,485 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 17:25:16,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 264 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 17:25:16,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-21 17:25:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2022-11-21 17:25:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.2) internal successors, (60), 53 states have internal predecessors, (60), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 17:25:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-11-21 17:25:16,505 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 26 [2022-11-21 17:25:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:25:16,505 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-11-21 17:25:16,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 17:25:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-11-21 17:25:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 17:25:16,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:25:16,508 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:25:16,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-21 17:25:16,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:25:16,722 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:25:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:25:16,723 INFO L85 PathProgramCache]: Analyzing trace with hash -334589841, now seen corresponding path program 5 times [2022-11-21 17:25:16,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:25:16,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014764373] [2022-11-21 17:25:16,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 17:25:16,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:25:16,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:25:16,724 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:25:16,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-21 17:25:16,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-21 17:25:16,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:25:16,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 17:25:16,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:25:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:25:18,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:25:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:25:21,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:25:21,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014764373] [2022-11-21 17:25:21,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014764373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:25:21,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:25:21,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-11-21 17:25:21,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608900431] [2022-11-21 17:25:21,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:25:21,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 17:25:21,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:25:21,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 17:25:21,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-21 17:25:21,470 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:25:22,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:25:22,434 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2022-11-21 17:25:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 17:25:22,443 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-21 17:25:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:25:22,444 INFO L225 Difference]: With dead ends: 81 [2022-11-21 17:25:22,444 INFO L226 Difference]: Without dead ends: 49 [2022-11-21 17:25:22,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-21 17:25:22,445 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 17:25:22,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 274 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 17:25:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-21 17:25:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-21 17:25:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-21 17:25:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-11-21 17:25:22,462 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2022-11-21 17:25:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:25:22,463 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-11-21 17:25:22,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:25:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-11-21 17:25:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 17:25:22,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:25:22,465 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:25:22,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-21 17:25:22,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:25:22,678 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:25:22,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:25:22,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 2 times [2022-11-21 17:25:22,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:25:22,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923138415] [2022-11-21 17:25:22,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:25:22,679 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:25:22,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:25:22,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:25:22,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-21 17:25:22,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:25:22,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:25:22,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 17:25:22,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:25:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:25:24,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:25:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:25:35,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:25:35,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923138415] [2022-11-21 17:25:35,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923138415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:25:35,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:25:35,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-21 17:25:35,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597398994] [2022-11-21 17:25:35,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:25:35,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 17:25:35,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:25:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 17:25:35,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:25:35,666 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:25:58,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:25:58,177 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-11-21 17:25:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 17:25:58,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-21 17:25:58,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:25:58,178 INFO L225 Difference]: With dead ends: 49 [2022-11-21 17:25:58,179 INFO L226 Difference]: Without dead ends: 23 [2022-11-21 17:25:58,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-11-21 17:25:58,180 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:25:58,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 390 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-21 17:25:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-21 17:25:58,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-21 17:25:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 17:25:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-21 17:25:58,185 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-11-21 17:25:58,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:25:58,185 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-21 17:25:58,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 17:25:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-21 17:25:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-21 17:25:58,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:25:58,187 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-21 17:25:58,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-21 17:25:58,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:25:58,406 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:25:58,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:25:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-11-21 17:25:58,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:25:58,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123151389] [2022-11-21 17:25:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:25:58,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:25:58,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:25:58,409 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:25:58,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c283bdb8-9a2b-4314-94d1-30b3da413558/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process