./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:35:01,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:35:01,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:35:01,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:35:01,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:35:01,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:35:01,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:35:01,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:35:01,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:35:01,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:35:01,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:35:01,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:35:01,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:35:01,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:35:01,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:35:01,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:35:01,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:35:01,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:35:01,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:35:01,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:35:01,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:35:01,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:35:01,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:35:01,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:35:01,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:35:01,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:35:01,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:35:01,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:35:01,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:35:01,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:35:01,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:35:01,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:35:01,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:35:01,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:35:01,750 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:35:01,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:35:01,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:35:01,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:35:01,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:35:01,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:35:01,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:35:01,755 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:35:01,799 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:35:01,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:35:01,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:35:01,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:35:01,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:35:01,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:35:01,810 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:35:01,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:35:01,810 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:35:01,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:35:01,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:35:01,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:35:01,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:35:01,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:35:01,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:35:01,813 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:35:01,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:35:01,814 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:35:01,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:35:01,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:35:01,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:35:01,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:35:01,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:35:01,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:35:01,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:35:01,816 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:35:01,816 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:35:01,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:35:01,816 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:35:01,817 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:35:01,817 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:35:01,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:35:01,817 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_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e46fdb43c1704e8aa9295c108b22e9521ffebb273e9060ca31abf40569948ab2 [2021-11-02 22:35:02,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:35:02,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:35:02,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:35:02,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:35:02,168 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:35:02,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2021-11-02 22:35:02,247 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/data/bc72c2e60/f0bade1e97374b1eb195c1e112201960/FLAGa684304c3 [2021-11-02 22:35:02,783 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:35:02,784 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2021-11-02 22:35:02,791 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/data/bc72c2e60/f0bade1e97374b1eb195c1e112201960/FLAGa684304c3 [2021-11-02 22:35:03,144 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/data/bc72c2e60/f0bade1e97374b1eb195c1e112201960 [2021-11-02 22:35:03,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:35:03,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:35:03,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:35:03,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:35:03,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:35:03,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:35:03" (1/1) ... [2021-11-02 22:35:03,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49460e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03, skipping insertion in model container [2021-11-02 22:35:03,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:35:03" (1/1) ... [2021-11-02 22:35:03,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:35:03,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:35:03,358 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i[951,964] [2021-11-02 22:35:03,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:35:03,385 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:35:03,398 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i[951,964] [2021-11-02 22:35:03,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:35:03,418 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:35:03,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03 WrapperNode [2021-11-02 22:35:03,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:35:03,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:35:03,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:35:03,420 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:35:03,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03" (1/1) ... [2021-11-02 22:35:03,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03" (1/1) ... [2021-11-02 22:35:03,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:35:03,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:35:03,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:35:03,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:35:03,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03" (1/1) ... [2021-11-02 22:35:03,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03" (1/1) ... [2021-11-02 22:35:03,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03" (1/1) ... [2021-11-02 22:35:03,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03" (1/1) ... [2021-11-02 22:35:03,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03" (1/1) ... [2021-11-02 22:35:03,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03" (1/1) ... [2021-11-02 22:35:03,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03" (1/1) ... [2021-11-02 22:35:03,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:35:03,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:35:03,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:35:03,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:35:03,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03" (1/1) ... [2021-11-02 22:35:03,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:35:03,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:03,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:35:03,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:35:03,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:35:03,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:35:03,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:35:03,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:35:03,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:35:03,746 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-02 22:35:03,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:35:03 BoogieIcfgContainer [2021-11-02 22:35:03,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:35:03,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:35:03,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:35:03,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:35:03,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:35:03" (1/3) ... [2021-11-02 22:35:03,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427d26f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:35:03, skipping insertion in model container [2021-11-02 22:35:03,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:03" (2/3) ... [2021-11-02 22:35:03,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427d26f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:35:03, skipping insertion in model container [2021-11-02 22:35:03,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:35:03" (3/3) ... [2021-11-02 22:35:03,758 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.i [2021-11-02 22:35:03,764 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:35:03,764 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 22:35:03,817 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:35:03,824 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:35:03,825 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 22:35:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:03,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:35:03,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:03,848 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:03,849 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:35:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1819218388, now seen corresponding path program 1 times [2021-11-02 22:35:03,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:03,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240931113] [2021-11-02 22:35:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:03,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:04,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:35:04,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240931113] [2021-11-02 22:35:04,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240931113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:04,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:04,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:35:04,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349235871] [2021-11-02 22:35:04,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:35:04,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:35:04,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:35:04,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:35:04,181 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:04,198 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2021-11-02 22:35:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:35:04,200 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-02 22:35:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:04,213 INFO L225 Difference]: With dead ends: 35 [2021-11-02 22:35:04,213 INFO L226 Difference]: Without dead ends: 16 [2021-11-02 22:35:04,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:35:04,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-02 22:35:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-02 22:35:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-02 22:35:04,254 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2021-11-02 22:35:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:04,257 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-02 22:35:04,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:04,258 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-02 22:35:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-02 22:35:04,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:04,259 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:04,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:35:04,260 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:35:04,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:04,265 INFO L85 PathProgramCache]: Analyzing trace with hash 177936045, now seen corresponding path program 1 times [2021-11-02 22:35:04,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:04,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90285808] [2021-11-02 22:35:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:04,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:04,302 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:35:04,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247580476] [2021-11-02 22:35:04,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:04,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:04,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:04,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:35:04,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:35:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:04,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:35:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:04,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:35:04,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90285808] [2021-11-02 22:35:04,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:35:04,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247580476] [2021-11-02 22:35:04,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247580476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:04,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:04,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:35:04,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692004140] [2021-11-02 22:35:04,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:35:04,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:35:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:35:04,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:35:04,524 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:04,553 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-11-02 22:35:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:35:04,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-02 22:35:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:04,555 INFO L225 Difference]: With dead ends: 29 [2021-11-02 22:35:04,556 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 22:35:04,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:35:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 22:35:04,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-02 22:35:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-02 22:35:04,569 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2021-11-02 22:35:04,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:04,569 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-02 22:35:04,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:04,570 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-02 22:35:04,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:35:04,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:04,571 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:04,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:04,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:04,796 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:35:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:04,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1269844846, now seen corresponding path program 1 times [2021-11-02 22:35:04,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:04,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852226527] [2021-11-02 22:35:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:04,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:04,813 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:35:04,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461863188] [2021-11-02 22:35:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:04,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:04,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:04,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:35:04,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:35:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:04,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:35:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:05,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:35:05,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852226527] [2021-11-02 22:35:05,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:35:05,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461863188] [2021-11-02 22:35:05,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461863188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:05,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:05,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:35:05,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299809667] [2021-11-02 22:35:05,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:35:05,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:35:05,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:35:05,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:35:05,192 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:05,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:05,261 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-11-02 22:35:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:35:05,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-02 22:35:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:05,262 INFO L225 Difference]: With dead ends: 34 [2021-11-02 22:35:05,263 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 22:35:05,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:35:05,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 22:35:05,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-11-02 22:35:05,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-02 22:35:05,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2021-11-02 22:35:05,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:05,272 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-02 22:35:05,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:05,273 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-02 22:35:05,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:35:05,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:05,274 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:05,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:05,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:05,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:35:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1820707731, now seen corresponding path program 1 times [2021-11-02 22:35:05,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:05,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412048325] [2021-11-02 22:35:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:05,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:05,495 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:35:05,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991927443] [2021-11-02 22:35:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:05,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:05,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:05,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:35:05,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:35:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:05,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:35:05,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:05,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:35:05,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412048325] [2021-11-02 22:35:05,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:35:05,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991927443] [2021-11-02 22:35:05,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991927443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:35:05,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:35:05,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-02 22:35:05,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50842117] [2021-11-02 22:35:05,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:35:05,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:35:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:35:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:35:05,640 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:05,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:05,677 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-11-02 22:35:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:35:05,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 22:35:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:05,679 INFO L225 Difference]: With dead ends: 36 [2021-11-02 22:35:05,681 INFO L226 Difference]: Without dead ends: 25 [2021-11-02 22:35:05,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:35:05,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-02 22:35:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-02 22:35:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-02 22:35:05,688 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 11 [2021-11-02 22:35:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:05,689 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-02 22:35:05,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-02 22:35:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:35:05,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:05,690 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:05,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:05,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:05,904 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:35:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash 656159560, now seen corresponding path program 1 times [2021-11-02 22:35:05,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:05,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348038761] [2021-11-02 22:35:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:05,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:05,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:35:05,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782016838] [2021-11-02 22:35:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:05,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:05,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:05,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:35:05,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:35:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:06,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:35:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:06,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:35:06,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348038761] [2021-11-02 22:35:06,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:35:06,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782016838] [2021-11-02 22:35:06,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782016838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:35:06,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:35:06,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 22:35:06,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542849279] [2021-11-02 22:35:06,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:35:06,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:35:06,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:35:06,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:35:06,303 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:06,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:06,430 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-11-02 22:35:06,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:35:06,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-02 22:35:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:06,435 INFO L225 Difference]: With dead ends: 43 [2021-11-02 22:35:06,436 INFO L226 Difference]: Without dead ends: 36 [2021-11-02 22:35:06,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:35:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-02 22:35:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-11-02 22:35:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-02 22:35:06,448 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 12 [2021-11-02 22:35:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:06,448 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-02 22:35:06,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:06,449 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-02 22:35:06,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:35:06,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:06,450 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:06,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:06,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:06,667 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:35:06,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:06,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1439244613, now seen corresponding path program 1 times [2021-11-02 22:35:06,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:06,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978692452] [2021-11-02 22:35:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:06,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:06,681 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:35:06,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884853422] [2021-11-02 22:35:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:06,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:06,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:06,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:35:06,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:35:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:06,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:35:06,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:06,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:35:06,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978692452] [2021-11-02 22:35:06,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:35:06,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884853422] [2021-11-02 22:35:06,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884853422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:06,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:06,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:35:06,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254936143] [2021-11-02 22:35:06,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:35:06,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:35:06,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:35:06,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:35:06,878 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:06,908 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-11-02 22:35:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:35:06,908 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-02 22:35:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:06,909 INFO L225 Difference]: With dead ends: 41 [2021-11-02 22:35:06,909 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 22:35:06,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:35:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 22:35:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-02 22:35:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-02 22:35:06,913 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 14 [2021-11-02 22:35:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:06,914 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-02 22:35:06,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:06,914 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-02 22:35:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:35:06,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:06,915 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:06,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:07,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 22:35:07,138 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:35:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:07,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2003180887, now seen corresponding path program 1 times [2021-11-02 22:35:07,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:07,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989519231] [2021-11-02 22:35:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:07,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:07,151 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:35:07,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697094489] [2021-11-02 22:35:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:07,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:07,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:07,153 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:35:07,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:35:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:07,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:35:07,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:07,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:35:07,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989519231] [2021-11-02 22:35:07,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:35:07,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697094489] [2021-11-02 22:35:07,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697094489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:35:07,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:35:07,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:35:07,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105461064] [2021-11-02 22:35:07,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:35:07,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:35:07,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:35:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:35:07,859 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:08,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:08,231 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-11-02 22:35:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:35:08,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-02 22:35:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:08,234 INFO L225 Difference]: With dead ends: 58 [2021-11-02 22:35:08,234 INFO L226 Difference]: Without dead ends: 40 [2021-11-02 22:35:08,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:35:08,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-02 22:35:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-11-02 22:35:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-11-02 22:35:08,239 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 17 [2021-11-02 22:35:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:08,239 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-11-02 22:35:08,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:08,239 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-11-02 22:35:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:35:08,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:08,240 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:08,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:08,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:08,449 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:35:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:08,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1222455332, now seen corresponding path program 1 times [2021-11-02 22:35:08,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:08,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996389796] [2021-11-02 22:35:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:08,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:08,464 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:35:08,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977510654] [2021-11-02 22:35:08,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:08,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:08,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:08,465 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:35:08,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:35:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:08,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:35:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:35:08,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:35:08,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996389796] [2021-11-02 22:35:08,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:35:08,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977510654] [2021-11-02 22:35:08,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977510654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:35:08,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:35:08,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 22:35:08,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313383600] [2021-11-02 22:35:08,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:35:08,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:35:08,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:35:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:35:08,651 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:08,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:08,684 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-11-02 22:35:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:35:08,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-02 22:35:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:08,690 INFO L225 Difference]: With dead ends: 54 [2021-11-02 22:35:08,690 INFO L226 Difference]: Without dead ends: 38 [2021-11-02 22:35:08,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:35:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-02 22:35:08,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-02 22:35:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-02 22:35:08,700 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 19 [2021-11-02 22:35:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:08,700 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-02 22:35:08,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:35:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-02 22:35:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:35:08,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:08,701 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:08,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:08,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:08,920 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:35:08,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:08,920 INFO L85 PathProgramCache]: Analyzing trace with hash -881504125, now seen corresponding path program 2 times [2021-11-02 22:35:08,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:35:08,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745923601] [2021-11-02 22:35:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:08,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:35:08,934 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:35:08,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232331337] [2021-11-02 22:35:08,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:35:08,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:35:08,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:08,938 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:35:08,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68b51014-753e-4ff0-94a0-1a91dbc01058/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process