./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G --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 f26bb7c01ef96852e13a34034142a6eda53bd301e224804a84caad37f299321b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:34:06,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:34:06,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:34:06,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:34:06,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:34:06,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:34:06,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:34:06,621 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:34:06,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:34:06,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:34:06,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:34:06,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:34:06,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:34:06,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:34:06,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:34:06,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:34:06,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:34:06,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:34:06,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:34:06,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:34:06,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:34:06,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:34:06,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:34:06,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:34:06,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:34:06,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:34:06,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:34:06,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:34:06,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:34:06,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:34:06,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:34:06,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:34:06,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:34:06,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:34:06,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:34:06,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:34:06,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:34:06,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:34:06,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:34:06,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:34:06,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:34:06,677 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:34:06,737 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:34:06,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:34:06,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:34:06,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:34:06,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:34:06,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:34:06,742 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:34:06,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:34:06,743 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:34:06,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:34:06,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:34:06,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:34:06,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:34:06,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:34:06,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:34:06,747 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:34:06,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:34:06,747 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:34:06,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:34:06,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:34:06,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:34:06,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:34:06,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:34:06,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:34:06,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:34:06,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:34:06,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:34:06,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:34:06,752 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:34:06,754 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:34:06,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:34:06,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:34:06,755 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_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f26bb7c01ef96852e13a34034142a6eda53bd301e224804a84caad37f299321b [2021-11-23 13:34:07,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:34:07,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:34:07,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:34:07,146 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:34:07,147 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:34:07,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i [2021-11-23 13:34:07,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/data/bc27454f6/593715f63ea54a88bc6ab5f18e4b2cd7/FLAGa704be822 [2021-11-23 13:34:07,811 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:34:07,812 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i [2021-11-23 13:34:07,820 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/data/bc27454f6/593715f63ea54a88bc6ab5f18e4b2cd7/FLAGa704be822 [2021-11-23 13:34:08,175 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/data/bc27454f6/593715f63ea54a88bc6ab5f18e4b2cd7 [2021-11-23 13:34:08,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:34:08,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:34:08,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:34:08,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:34:08,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:34:08,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:34:08" (1/1) ... [2021-11-23 13:34:08,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46874981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08, skipping insertion in model container [2021-11-23 13:34:08,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:34:08" (1/1) ... [2021-11-23 13:34:08,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:34:08,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:34:08,459 WARN L230 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_a43464e1-3d04-4e43-9a13-4b869fbc3e78/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i[951,964] [2021-11-23 13:34:08,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:34:08,486 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:34:08,503 WARN L230 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_a43464e1-3d04-4e43-9a13-4b869fbc3e78/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i[951,964] [2021-11-23 13:34:08,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:34:08,527 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:34:08,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08 WrapperNode [2021-11-23 13:34:08,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:34:08,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:34:08,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:34:08,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:34:08,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08" (1/1) ... [2021-11-23 13:34:08,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08" (1/1) ... [2021-11-23 13:34:08,575 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2021-11-23 13:34:08,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:34:08,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:34:08,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:34:08,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:34:08,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08" (1/1) ... [2021-11-23 13:34:08,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08" (1/1) ... [2021-11-23 13:34:08,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08" (1/1) ... [2021-11-23 13:34:08,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08" (1/1) ... [2021-11-23 13:34:08,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08" (1/1) ... [2021-11-23 13:34:08,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08" (1/1) ... [2021-11-23 13:34:08,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08" (1/1) ... [2021-11-23 13:34:08,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:34:08,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:34:08,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:34:08,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:34:08,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08" (1/1) ... [2021-11-23 13:34:08,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:34:08,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:08,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:34:08,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:34:08,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:34:08,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:34:08,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:34:08,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:34:08,810 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:34:08,812 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:34:08,961 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:34:08,969 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:34:08,969 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 13:34:08,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:34:08 BoogieIcfgContainer [2021-11-23 13:34:08,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:34:08,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:34:08,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:34:08,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:34:08,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:34:08" (1/3) ... [2021-11-23 13:34:08,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528bd287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:34:08, skipping insertion in model container [2021-11-23 13:34:08,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:34:08" (2/3) ... [2021-11-23 13:34:08,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528bd287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:34:08, skipping insertion in model container [2021-11-23 13:34:08,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:34:08" (3/3) ... [2021-11-23 13:34:08,982 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound100.i [2021-11-23 13:34:08,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:34:08,989 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 13:34:09,050 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:34:09,059 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 [2021-11-23 13:34:09,060 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 13:34:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 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) [2021-11-23 13:34:09,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 13:34:09,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:09,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:09,086 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:34:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:09,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1819249172, now seen corresponding path program 1 times [2021-11-23 13:34:09,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:09,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55606388] [2021-11-23 13:34:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:09,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:34:09,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:09,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55606388] [2021-11-23 13:34:09,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55606388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:09,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:34:09,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:34:09,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850995485] [2021-11-23 13:34:09,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:09,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:34:09,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:09,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:34:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:34:09,323 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 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) [2021-11-23 13:34:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:09,342 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-11-23 13:34:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:34:09,345 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 [2021-11-23 13:34:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:09,357 INFO L225 Difference]: With dead ends: 37 [2021-11-23 13:34:09,357 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 13:34:09,361 INFO L932 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 [2021-11-23 13:34:09,366 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:09,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:34:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 13:34:09,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 13:34:09,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-23 13:34:09,411 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2021-11-23 13:34:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:09,411 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-23 13:34:09,412 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) [2021-11-23 13:34:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-23 13:34:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 13:34:09,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:09,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:09,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:34:09,414 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:34:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:09,415 INFO L85 PathProgramCache]: Analyzing trace with hash 177936045, now seen corresponding path program 1 times [2021-11-23 13:34:09,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:09,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351296155] [2021-11-23 13:34:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:09,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:09,453 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:34:09,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389179330] [2021-11-23 13:34:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:09,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:09,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:09,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:09,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:34:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:09,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:34:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:34:09,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:34:09,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:09,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351296155] [2021-11-23 13:34:09,768 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:34:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389179330] [2021-11-23 13:34:09,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389179330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:09,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:34:09,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:34:09,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828931734] [2021-11-23 13:34:09,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:09,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:34:09,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:09,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:34:09,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:34:09,775 INFO L87 Difference]: Start difference. First operand 17 states and 21 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) [2021-11-23 13:34:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:09,798 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-23 13:34:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:34:09,800 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 [2021-11-23 13:34:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:09,801 INFO L225 Difference]: With dead ends: 31 [2021-11-23 13:34:09,801 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 13:34:09,802 INFO L932 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 [2021-11-23 13:34:09,805 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:09,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:34:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 13:34:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 13:34:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:09,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-23 13:34:09,818 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 8 [2021-11-23 13:34:09,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:09,819 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-23 13:34:09,821 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) [2021-11-23 13:34:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-23 13:34:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:34:09,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:09,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:09,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:10,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:10,040 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:34:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:10,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1269844846, now seen corresponding path program 1 times [2021-11-23 13:34:10,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:10,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995218949] [2021-11-23 13:34:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:10,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:10,067 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:34:10,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587422181] [2021-11-23 13:34:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:10,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:10,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:10,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:10,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:34:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:10,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 13:34:10,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:34:10,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:34:10,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:10,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995218949] [2021-11-23 13:34:10,387 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:34:10,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587422181] [2021-11-23 13:34:10,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587422181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:10,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:34:10,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:34:10,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37911006] [2021-11-23 13:34:10,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:10,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:34:10,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:10,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:34:10,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:34:10,392 INFO L87 Difference]: Start difference. First operand 19 states and 23 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) [2021-11-23 13:34:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:10,522 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-11-23 13:34:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:34:10,523 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 [2021-11-23 13:34:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:10,524 INFO L225 Difference]: With dead ends: 36 [2021-11-23 13:34:10,524 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 13:34:10,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:34:10,527 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:10,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 59 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 13:34:10,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-11-23 13:34:10,535 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) [2021-11-23 13:34:10,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-23 13:34:10,536 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 9 [2021-11-23 13:34:10,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:10,537 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-23 13:34:10,538 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) [2021-11-23 13:34:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-23 13:34:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:34:10,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:10,539 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:10,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 13:34:10,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:10,764 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:34:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:10,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1820707731, now seen corresponding path program 1 times [2021-11-23 13:34:10,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:10,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226126896] [2021-11-23 13:34:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:10,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:10,786 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:34:10,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209722992] [2021-11-23 13:34:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:10,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:10,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:10,789 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:10,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:34:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:10,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:34:10,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:34:10,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:34:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:34:10,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:10,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226126896] [2021-11-23 13:34:10,991 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:34:10,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209722992] [2021-11-23 13:34:10,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209722992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:34:10,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:34:10,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 13:34:10,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387022321] [2021-11-23 13:34:10,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:34:10,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:34:10,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:10,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:34:10,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:34:10,996 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:11,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:11,109 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2021-11-23 13:34:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:34:11,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 13:34:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:11,111 INFO L225 Difference]: With dead ends: 59 [2021-11-23 13:34:11,112 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 13:34:11,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:34:11,114 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:11,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 84 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:11,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 13:34:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2021-11-23 13:34:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 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) [2021-11-23 13:34:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-23 13:34:11,125 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 11 [2021-11-23 13:34:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:11,125 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-23 13:34:11,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-23 13:34:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:34:11,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:11,127 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:11,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:11,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:11,328 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:34:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:11,329 INFO L85 PathProgramCache]: Analyzing trace with hash 656159560, now seen corresponding path program 1 times [2021-11-23 13:34:11,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:11,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554034525] [2021-11-23 13:34:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:11,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:11,349 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:34:11,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438470437] [2021-11-23 13:34:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:11,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:11,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:11,365 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:11,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:34:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:11,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 13:34:11,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 13:34:11,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:34:11,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554034525] [2021-11-23 13:34:11,618 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:34:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438470437] [2021-11-23 13:34:11,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438470437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:11,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:34:11,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:34:11,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659124953] [2021-11-23 13:34:11,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:11,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:34:11,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:11,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:34:11,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:34:11,622 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-23 13:34:11,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:11,698 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-11-23 13:34:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:34:11,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 [2021-11-23 13:34:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:11,701 INFO L225 Difference]: With dead ends: 51 [2021-11-23 13:34:11,701 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 13:34:11,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:34:11,704 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:11,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:34:11,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 13:34:11,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-11-23 13:34:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.3125) internal successors, (42), 33 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) [2021-11-23 13:34:11,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-23 13:34:11,715 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 12 [2021-11-23 13:34:11,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:11,715 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-23 13:34:11,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-23 13:34:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-23 13:34:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 13:34:11,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:11,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:11,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:11,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:11,944 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:34:11,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:11,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1975608647, now seen corresponding path program 1 times [2021-11-23 13:34:11,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:11,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75550371] [2021-11-23 13:34:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:11,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:11,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:34:11,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394334044] [2021-11-23 13:34:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:11,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:11,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:11,972 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:11,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:34:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:12,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 13:34:12,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:34:12,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:34:12,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:34:12,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75550371] [2021-11-23 13:34:12,121 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:34:12,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394334044] [2021-11-23 13:34:12,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394334044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:34:12,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:34:12,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:34:12,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654437856] [2021-11-23 13:34:12,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:34:12,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:34:12,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:34:12,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:34:12,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:34:12,124 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:34:12,176 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-11-23 13:34:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:34:12,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 13:34:12,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:34:12,179 INFO L225 Difference]: With dead ends: 57 [2021-11-23 13:34:12,179 INFO L226 Difference]: Without dead ends: 34 [2021-11-23 13:34:12,179 INFO L932 BasicCegarLoop]: 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 [2021-11-23 13:34:12,181 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:34:12,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:34:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-23 13:34:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-23 13:34:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.28125) internal successors, (41), 33 states have internal predecessors, (41), 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) [2021-11-23 13:34:12,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-23 13:34:12,197 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 15 [2021-11-23 13:34:12,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:34:12,197 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-23 13:34:12,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:34:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-23 13:34:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 13:34:12,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:34:12,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:34:12,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:34:12,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:12,416 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:34:12,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:34:12,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1259358445, now seen corresponding path program 1 times [2021-11-23 13:34:12,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:34:12,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456685463] [2021-11-23 13:34:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:12,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:34:12,442 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:34:12,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794009195] [2021-11-23 13:34:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:34:12,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:34:12,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:34:12,444 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:34:12,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:34:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:34:12,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 13:34:12,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:34:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:34:13,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:35:10,512 WARN L227 SmtUtils]: Spent 11.44s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:35:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:35:32,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:35:32,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456685463] [2021-11-23 13:35:32,385 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:35:32,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794009195] [2021-11-23 13:35:32,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794009195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:35:32,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:35:32,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-23 13:35:32,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625224061] [2021-11-23 13:35:32,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:35:32,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 13:35:32,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:35:32,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 13:35:32,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=86, Unknown=5, NotChecked=0, Total=132 [2021-11-23 13:35:32,389 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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) [2021-11-23 13:35:34,585 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse3 (* 2 |c_ULTIMATE.start_main_~q~0#1|)) (.cse2 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (and (= (mod (+ (* |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse0) (or (= .cse1 .cse2) (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse3 (div .cse1 2))) 4294967296) .cse0)) (let ((.cse4 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse5 (mod (* |c_ULTIMATE.start_main_~b~0#1| 2) 4294967296))) (or (< .cse4 .cse1) (<= .cse5 .cse4) (= .cse0 (mod (+ (* .cse3 (div .cse5 2)) |c_ULTIMATE.start_main_~r~0#1|) 4294967296)) (= .cse2 .cse5))))) is different from false [2021-11-23 13:35:36,809 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse4 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse3 (* 2 |c_ULTIMATE.start_main_~q~0#1|)) (.cse2 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (and (or (<= .cse0 .cse1) (= .cse0 .cse2) (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse3 (div .cse0 2))) 4294967296) .cse4)) (let ((.cse5 (mod (* |c_ULTIMATE.start_main_~b~0#1| 2) 4294967296))) (or (< .cse1 .cse0) (<= .cse5 .cse1) (= .cse4 (mod (+ (* .cse3 (div .cse5 2)) |c_ULTIMATE.start_main_~r~0#1|) 4294967296)) (= .cse2 .cse5))))) is different from true [2021-11-23 13:35:38,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:35:41,063 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:35:43,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:35:45,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:35:47,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:35:49,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:35:51,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:35:54,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:35:56,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:35:58,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:36:00,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:36:02,783 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse3 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse2 (* 2 |c_ULTIMATE.start_main_~q~0#1|)) (.cse1 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (and (or (= .cse0 .cse1) (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* .cse2 (div .cse0 2))) 4294967296) .cse3)) (let ((.cse4 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse5 (mod (* |c_ULTIMATE.start_main_~b~0#1| 2) 4294967296))) (or (< .cse4 .cse0) (<= .cse5 .cse4) (= .cse3 (mod (+ (* .cse2 (div .cse5 2)) |c_ULTIMATE.start_main_~r~0#1|) 4294967296)) (= .cse1 .cse5))))) is different from true [2021-11-23 13:36:04,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:36:07,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:36:09,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:36:11,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:36:13,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:36:15,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:36:17,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:36:36,546 WARN L227 SmtUtils]: Spent 14.00s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:36:38,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:36:40,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:36:42,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:36:45,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:37:15,691 WARN L227 SmtUtils]: Spent 19.38s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:37:17,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:37:19,992 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:37:22,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:37:24,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:37:26,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:37:28,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:37:42,020 WARN L227 SmtUtils]: Spent 10.92s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:37:44,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:37:46,222 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:37:48,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:37:50,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:37:52,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:19,059 WARN L227 SmtUtils]: Spent 10.95s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 13:38:21,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:23,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:25,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:27,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:29,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:31,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:34,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:36,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-23 13:38:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:36,682 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2021-11-23 13:38:36,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 13:38:36,831 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 13:38:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:36,832 INFO L225 Difference]: With dead ends: 120 [2021-11-23 13:38:36,833 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 13:38:36,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 122.1s TimeCoverageRelationStatistics Valid=130, Invalid=279, Unknown=23, NotChecked=120, Total=552 [2021-11-23 13:38:36,835 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 33 mSolverCounterUnsat, 40 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 40 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 89.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:36,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 162 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 120 Invalid, 40 Unknown, 21 Unchecked, 89.1s Time] [2021-11-23 13:38:36,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 13:38:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 52. [2021-11-23 13:38:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.22) internal successors, (61), 51 states have internal predecessors, (61), 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) [2021-11-23 13:38:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-11-23 13:38:36,850 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 18 [2021-11-23 13:38:36,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:36,850 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-11-23 13:38:36,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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) [2021-11-23 13:38:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-11-23 13:38:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 13:38:36,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:36,852 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:36,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:37,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 13:38:37,054 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:38:37,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:37,054 INFO L85 PathProgramCache]: Analyzing trace with hash 459667102, now seen corresponding path program 2 times [2021-11-23 13:38:37,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:37,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252616684] [2021-11-23 13:38:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:37,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:37,071 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:38:37,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689103514] [2021-11-23 13:38:37,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:38:37,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:37,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:37,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:37,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a43464e1-3d04-4e43-9a13-4b869fbc3e78/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process