./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:51:09,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:51:09,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:51:09,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:51:09,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:51:09,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:51:09,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:51:09,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:51:09,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:51:09,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:51:09,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:51:09,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:51:09,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:51:09,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:51:09,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:51:09,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:51:09,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:51:09,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:51:09,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:51:09,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:51:09,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:51:09,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:51:09,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:51:09,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:51:09,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:51:09,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:51:09,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:51:09,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:51:09,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:51:09,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:51:09,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:51:09,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:51:09,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:51:09,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:51:09,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:51:09,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:51:09,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:51:09,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:51:09,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:51:09,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:51:09,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:51:09,746 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:51:09,788 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:51:09,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:51:09,789 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:51:09,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:51:09,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:51:09,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:51:09,797 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:51:09,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:51:09,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:51:09,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:51:09,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:51:09,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:51:09,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:51:09,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:51:09,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:51:09,800 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:51:09,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:51:09,800 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:51:09,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:51:09,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:51:09,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:51:09,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:51:09,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:51:09,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:51:09,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:51:09,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:51:09,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:51:09,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:51:09,802 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:51:09,804 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:51:09,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:51:09,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:51:09,805 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_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e [2021-11-02 22:51:10,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:51:10,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:51:10,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:51:10,153 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:51:10,154 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:51:10,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-11-02 22:51:10,230 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/data/37cf814f6/3454263e686d42628be0a7ec746e65eb/FLAG2e90c499b [2021-11-02 22:51:10,744 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:51:10,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-11-02 22:51:10,753 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/data/37cf814f6/3454263e686d42628be0a7ec746e65eb/FLAG2e90c499b [2021-11-02 22:51:11,124 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/data/37cf814f6/3454263e686d42628be0a7ec746e65eb [2021-11-02 22:51:11,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:51:11,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:51:11,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:51:11,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:51:11,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:51:11,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:51:11" (1/1) ... [2021-11-02 22:51:11,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@452b35ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11, skipping insertion in model container [2021-11-02 22:51:11,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:51:11" (1/1) ... [2021-11-02 22:51:11,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:51:11,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:51:11,340 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2021-11-02 22:51:11,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:51:11,378 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:51:11,389 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2021-11-02 22:51:11,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:51:11,418 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:51:11,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11 WrapperNode [2021-11-02 22:51:11,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:51:11,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:51:11,421 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:51:11,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:51:11,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11" (1/1) ... [2021-11-02 22:51:11,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11" (1/1) ... [2021-11-02 22:51:11,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:51:11,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:51:11,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:51:11,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:51:11,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11" (1/1) ... [2021-11-02 22:51:11,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11" (1/1) ... [2021-11-02 22:51:11,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11" (1/1) ... [2021-11-02 22:51:11,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11" (1/1) ... [2021-11-02 22:51:11,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11" (1/1) ... [2021-11-02 22:51:11,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11" (1/1) ... [2021-11-02 22:51:11,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11" (1/1) ... [2021-11-02 22:51:11,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:51:11,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:51:11,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:51:11,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:51:11,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11" (1/1) ... [2021-11-02 22:51:11,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:51:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:11,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:51:11,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:51:11,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:51:11,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:51:11,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:51:11,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:51:11,900 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:51:11,901 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-11-02 22:51:11,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:51:11 BoogieIcfgContainer [2021-11-02 22:51:11,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:51:11,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:51:11,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:51:11,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:51:11,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:51:11" (1/3) ... [2021-11-02 22:51:11,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389e4cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:51:11, skipping insertion in model container [2021-11-02 22:51:11,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:11" (2/3) ... [2021-11-02 22:51:11,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389e4cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:51:11, skipping insertion in model container [2021-11-02 22:51:11,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:51:11" (3/3) ... [2021-11-02 22:51:11,911 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2021-11-02 22:51:11,917 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:51:11,917 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-02 22:51:11,984 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:51:11,998 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:51:11,999 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-02 22:51:12,035 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 40 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:51:12,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:12,045 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:12,045 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:12,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash -174497841, now seen corresponding path program 1 times [2021-11-02 22:51:12,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:12,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141776324] [2021-11-02 22:51:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:12,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:12,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:12,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141776324] [2021-11-02 22:51:12,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141776324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:12,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:12,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:51:12,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386838455] [2021-11-02 22:51:12,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:51:12,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:12,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:51:12,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:51:12,241 INFO L87 Difference]: Start difference. First operand has 41 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 40 states have internal predecessors, (58), 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 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:12,259 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2021-11-02 22:51:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:51:12,260 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-02 22:51:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:12,276 INFO L225 Difference]: With dead ends: 79 [2021-11-02 22:51:12,277 INFO L226 Difference]: Without dead ends: 37 [2021-11-02 22:51:12,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:51:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-02 22:51:12,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-02 22:51:12,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.21875) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-02 22:51:12,313 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 14 [2021-11-02 22:51:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:12,314 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-02 22:51:12,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-02 22:51:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:51:12,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:12,315 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:12,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:51:12,316 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:12,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1454170515, now seen corresponding path program 1 times [2021-11-02 22:51:12,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:12,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245139522] [2021-11-02 22:51:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:12,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:12,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:12,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679028030] [2021-11-02 22:51:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:12,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:12,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:12,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:12,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:51:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:12,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:51:12,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:12,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:12,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245139522] [2021-11-02 22:51:12,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:12,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679028030] [2021-11-02 22:51:12,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679028030] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:12,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:12,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:51:12,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494277483] [2021-11-02 22:51:12,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:51:12,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:12,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:51:12,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:51:12,664 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-11-02 22:51:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:12,768 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-11-02 22:51:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:51:12,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 [2021-11-02 22:51:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:12,771 INFO L225 Difference]: With dead ends: 64 [2021-11-02 22:51:12,771 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 22:51:12,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:51:12,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 22:51:12,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2021-11-02 22:51:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 38 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) [2021-11-02 22:51:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-11-02 22:51:12,780 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 15 [2021-11-02 22:51:12,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:12,781 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-11-02 22:51:12,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-11-02 22:51:12,781 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-11-02 22:51:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:51:12,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:12,783 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:12,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:12,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:12,999 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:13,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1580206288, now seen corresponding path program 1 times [2021-11-02 22:51:13,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:13,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29231519] [2021-11-02 22:51:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:13,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:13,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:13,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640726956] [2021-11-02 22:51:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:13,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:13,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:13,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:13,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:51:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:13,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:51:13,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:13,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:13,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29231519] [2021-11-02 22:51:13,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:13,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640726956] [2021-11-02 22:51:13,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640726956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:13,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:13,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:51:13,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86303392] [2021-11-02 22:51:13,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:51:13,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:13,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:51:13,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:51:13,515 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:13,759 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-02 22:51:13,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:51:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-02 22:51:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:13,763 INFO L225 Difference]: With dead ends: 60 [2021-11-02 22:51:13,763 INFO L226 Difference]: Without dead ends: 58 [2021-11-02 22:51:13,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:51:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-02 22:51:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2021-11-02 22:51:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-11-02 22:51:13,783 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 17 [2021-11-02 22:51:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:13,783 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-11-02 22:51:13,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-11-02 22:51:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:51:13,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:13,785 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:13,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:14,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:14,002 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:14,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:14,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1840022701, now seen corresponding path program 1 times [2021-11-02 22:51:14,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:14,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369937816] [2021-11-02 22:51:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:14,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:14,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:14,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743835064] [2021-11-02 22:51:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:14,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:14,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:14,045 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:14,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:51:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:14,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:51:14,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:14,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:14,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369937816] [2021-11-02 22:51:14,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:14,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743835064] [2021-11-02 22:51:14,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743835064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:14,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:14,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:51:14,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715271618] [2021-11-02 22:51:14,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:51:14,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:14,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:51:14,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:51:14,744 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:15,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:15,169 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-11-02 22:51:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:51:15,170 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-02 22:51:15,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:15,171 INFO L225 Difference]: With dead ends: 75 [2021-11-02 22:51:15,171 INFO L226 Difference]: Without dead ends: 73 [2021-11-02 22:51:15,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:51:15,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-02 22:51:15,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2021-11-02 22:51:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-02 22:51:15,186 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 19 [2021-11-02 22:51:15,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:15,186 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-02 22:51:15,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-02 22:51:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:51:15,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:15,188 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:15,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:15,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:15,401 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1412177226, now seen corresponding path program 1 times [2021-11-02 22:51:15,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:15,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015732366] [2021-11-02 22:51:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:15,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:15,420 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:15,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558320199] [2021-11-02 22:51:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:15,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:15,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:15,426 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:15,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:51:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:15,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:51:15,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:15,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:15,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015732366] [2021-11-02 22:51:15,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:15,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558320199] [2021-11-02 22:51:15,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558320199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:15,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:15,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 22:51:15,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491946644] [2021-11-02 22:51:15,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:51:15,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:15,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:51:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:51:15,671 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:15,829 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2021-11-02 22:51:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:51:15,829 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 22:51:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:15,833 INFO L225 Difference]: With dead ends: 140 [2021-11-02 22:51:15,833 INFO L226 Difference]: Without dead ends: 136 [2021-11-02 22:51:15,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:51:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-02 22:51:15,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 75. [2021-11-02 22:51:15,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.3) internal successors, (91), 74 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2021-11-02 22:51:15,858 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 20 [2021-11-02 22:51:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:15,859 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2021-11-02 22:51:15,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2021-11-02 22:51:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:51:15,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:15,861 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:15,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:16,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:16,082 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:16,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1264867958, now seen corresponding path program 1 times [2021-11-02 22:51:16,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:16,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281816243] [2021-11-02 22:51:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:16,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:16,100 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:16,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749973130] [2021-11-02 22:51:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:16,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:16,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:16,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:16,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:51:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:16,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:51:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:16,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:16,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281816243] [2021-11-02 22:51:16,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:16,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749973130] [2021-11-02 22:51:16,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749973130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:16,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:16,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:51:16,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737520617] [2021-11-02 22:51:16,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:51:16,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:51:16,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:51:16,493 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:16,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:16,658 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2021-11-02 22:51:16,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:51:16,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-02 22:51:16,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:16,660 INFO L225 Difference]: With dead ends: 95 [2021-11-02 22:51:16,660 INFO L226 Difference]: Without dead ends: 93 [2021-11-02 22:51:16,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:51:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-02 22:51:16,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2021-11-02 22:51:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 83 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:16,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2021-11-02 22:51:16,683 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 21 [2021-11-02 22:51:16,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:16,684 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2021-11-02 22:51:16,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:16,684 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2021-11-02 22:51:16,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 22:51:16,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:16,685 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:16,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-02 22:51:16,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:16,904 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:16,904 INFO L85 PathProgramCache]: Analyzing trace with hash 94063923, now seen corresponding path program 1 times [2021-11-02 22:51:16,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:16,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718094525] [2021-11-02 22:51:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:16,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:16,919 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:16,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401018833] [2021-11-02 22:51:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:16,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:16,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:16,921 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:16,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:51:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:17,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 22:51:17,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:17,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:17,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718094525] [2021-11-02 22:51:17,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:17,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401018833] [2021-11-02 22:51:17,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401018833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:17,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:17,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 22:51:17,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354737202] [2021-11-02 22:51:17,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:51:17,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:17,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:51:17,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:51:17,541 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:17,871 INFO L93 Difference]: Finished difference Result 119 states and 137 transitions. [2021-11-02 22:51:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:51:17,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 22:51:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:17,873 INFO L225 Difference]: With dead ends: 119 [2021-11-02 22:51:17,873 INFO L226 Difference]: Without dead ends: 117 [2021-11-02 22:51:17,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:51:17,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-02 22:51:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2021-11-02 22:51:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.3020833333333333) internal successors, (125), 100 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2021-11-02 22:51:17,884 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 22 [2021-11-02 22:51:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:17,885 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2021-11-02 22:51:17,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2021-11-02 22:51:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:51:17,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:17,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:17,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:18,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:18,114 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:18,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:18,115 INFO L85 PathProgramCache]: Analyzing trace with hash 62520889, now seen corresponding path program 1 times [2021-11-02 22:51:18,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:18,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695615791] [2021-11-02 22:51:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:18,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:18,129 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:18,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557245287] [2021-11-02 22:51:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:18,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:18,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:18,131 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:18,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:51:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:18,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:51:18,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:18,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:18,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695615791] [2021-11-02 22:51:18,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:18,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557245287] [2021-11-02 22:51:18,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557245287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:18,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:18,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:51:18,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589662733] [2021-11-02 22:51:18,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:51:18,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:18,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:51:18,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:51:18,402 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) [2021-11-02 22:51:18,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:18,472 INFO L93 Difference]: Finished difference Result 192 states and 240 transitions. [2021-11-02 22:51:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:51:18,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) Word has length 23 [2021-11-02 22:51:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:18,477 INFO L225 Difference]: With dead ends: 192 [2021-11-02 22:51:18,477 INFO L226 Difference]: Without dead ends: 190 [2021-11-02 22:51:18,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:51:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-02 22:51:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 141. [2021-11-02 22:51:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.2794117647058822) internal successors, (174), 140 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 174 transitions. [2021-11-02 22:51:18,502 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 174 transitions. Word has length 23 [2021-11-02 22:51:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:18,503 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 174 transitions. [2021-11-02 22:51:18,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) [2021-11-02 22:51:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 174 transitions. [2021-11-02 22:51:18,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:51:18,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:18,504 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:18,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:18,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:51:18,718 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:18,719 INFO L85 PathProgramCache]: Analyzing trace with hash 201274102, now seen corresponding path program 1 times [2021-11-02 22:51:18,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:18,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916686023] [2021-11-02 22:51:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:18,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:18,735 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:18,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299904451] [2021-11-02 22:51:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:18,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:18,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:18,745 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:18,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:51:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:18,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 22:51:18,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:19,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:19,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916686023] [2021-11-02 22:51:19,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:19,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299904451] [2021-11-02 22:51:19,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299904451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:19,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:19,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:51:19,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749234289] [2021-11-02 22:51:19,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:51:19,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:19,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:51:19,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:51:19,139 INFO L87 Difference]: Start difference. First operand 141 states and 174 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:19,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:19,289 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2021-11-02 22:51:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:51:19,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 22:51:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:19,290 INFO L225 Difference]: With dead ends: 157 [2021-11-02 22:51:19,291 INFO L226 Difference]: Without dead ends: 155 [2021-11-02 22:51:19,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:51:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-02 22:51:19,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2021-11-02 22:51:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.2647058823529411) internal successors, (172), 140 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2021-11-02 22:51:19,303 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 24 [2021-11-02 22:51:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:19,304 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2021-11-02 22:51:19,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:19,304 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2021-11-02 22:51:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:51:19,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:19,305 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:19,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:19,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:19,528 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:19,529 INFO L85 PathProgramCache]: Analyzing trace with hash 151041369, now seen corresponding path program 1 times [2021-11-02 22:51:19,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:19,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55450462] [2021-11-02 22:51:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:19,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:19,546 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:19,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079506247] [2021-11-02 22:51:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:19,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:19,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:19,559 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:19,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:51:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:19,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:51:19,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:19,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:19,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55450462] [2021-11-02 22:51:19,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:19,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079506247] [2021-11-02 22:51:19,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079506247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:19,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:19,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:51:19,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122300706] [2021-11-02 22:51:19,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:51:19,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:19,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:51:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:51:19,962 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:20,200 INFO L93 Difference]: Finished difference Result 254 states and 297 transitions. [2021-11-02 22:51:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:51:20,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 26 [2021-11-02 22:51:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:20,203 INFO L225 Difference]: With dead ends: 254 [2021-11-02 22:51:20,203 INFO L226 Difference]: Without dead ends: 252 [2021-11-02 22:51:20,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:51:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-02 22:51:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 175. [2021-11-02 22:51:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.2588235294117647) internal successors, (214), 174 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 214 transitions. [2021-11-02 22:51:20,222 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 214 transitions. Word has length 26 [2021-11-02 22:51:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:20,222 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 214 transitions. [2021-11-02 22:51:20,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 214 transitions. [2021-11-02 22:51:20,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 22:51:20,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:20,224 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:20,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:20,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:51:20,445 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:20,445 INFO L85 PathProgramCache]: Analyzing trace with hash -74821968, now seen corresponding path program 2 times [2021-11-02 22:51:20,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:20,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200564307] [2021-11-02 22:51:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:20,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:20,458 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:20,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819973420] [2021-11-02 22:51:20,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:51:20,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:20,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:20,459 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:20,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:51:20,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:51:20,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:51:20,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:51:20,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:20,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:20,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200564307] [2021-11-02 22:51:20,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:20,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819973420] [2021-11-02 22:51:20,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819973420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:20,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:20,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:51:20,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941554545] [2021-11-02 22:51:20,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:51:20,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:20,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:51:20,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:51:20,755 INFO L87 Difference]: Start difference. First operand 175 states and 214 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:20,854 INFO L93 Difference]: Finished difference Result 249 states and 298 transitions. [2021-11-02 22:51:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:51:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 22:51:20,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:20,858 INFO L225 Difference]: With dead ends: 249 [2021-11-02 22:51:20,859 INFO L226 Difference]: Without dead ends: 167 [2021-11-02 22:51:20,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:51:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-02 22:51:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 93. [2021-11-02 22:51:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 92 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-11-02 22:51:20,873 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 27 [2021-11-02 22:51:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:20,873 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-11-02 22:51:20,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-11-02 22:51:20,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 22:51:20,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:20,880 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:20,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:21,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 22:51:21,106 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:21,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1112899551, now seen corresponding path program 1 times [2021-11-02 22:51:21,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:21,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265678572] [2021-11-02 22:51:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:21,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:21,118 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:21,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399794087] [2021-11-02 22:51:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:21,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:21,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:21,119 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:21,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:51:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:21,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 22:51:21,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:22,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:22,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265678572] [2021-11-02 22:51:22,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:22,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399794087] [2021-11-02 22:51:22,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399794087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:22,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:22,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 22:51:22,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476605760] [2021-11-02 22:51:22,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:51:22,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:22,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:51:22,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:51:22,128 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:22,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:22,576 INFO L93 Difference]: Finished difference Result 204 states and 230 transitions. [2021-11-02 22:51:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:51:22,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 22:51:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:22,578 INFO L225 Difference]: With dead ends: 204 [2021-11-02 22:51:22,578 INFO L226 Difference]: Without dead ends: 194 [2021-11-02 22:51:22,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:51:22,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-02 22:51:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 110. [2021-11-02 22:51:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 109 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2021-11-02 22:51:22,596 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 32 [2021-11-02 22:51:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:22,596 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2021-11-02 22:51:22,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2021-11-02 22:51:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 22:51:22,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:22,597 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:22,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:22,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:22,822 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:22,822 INFO L85 PathProgramCache]: Analyzing trace with hash -986732336, now seen corresponding path program 1 times [2021-11-02 22:51:22,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:22,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892557828] [2021-11-02 22:51:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:22,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:22,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:22,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828801909] [2021-11-02 22:51:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:22,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:22,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:22,841 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:22,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:51:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:23,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:51:23,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:23,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:23,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892557828] [2021-11-02 22:51:23,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:23,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828801909] [2021-11-02 22:51:23,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828801909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:23,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:23,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 22:51:23,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269658194] [2021-11-02 22:51:23,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:51:23,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:23,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:51:23,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:51:23,531 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:23,860 INFO L93 Difference]: Finished difference Result 197 states and 224 transitions. [2021-11-02 22:51:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:51:23,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 22:51:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:23,863 INFO L225 Difference]: With dead ends: 197 [2021-11-02 22:51:23,863 INFO L226 Difference]: Without dead ends: 195 [2021-11-02 22:51:23,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:51:23,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-02 22:51:23,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 165. [2021-11-02 22:51:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.1875) internal successors, (190), 164 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 190 transitions. [2021-11-02 22:51:23,894 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 190 transitions. Word has length 32 [2021-11-02 22:51:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:23,895 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 190 transitions. [2021-11-02 22:51:23,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 190 transitions. [2021-11-02 22:51:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:51:23,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:23,896 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:23,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:24,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:51:24,111 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:24,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:24,111 INFO L85 PathProgramCache]: Analyzing trace with hash -315127458, now seen corresponding path program 2 times [2021-11-02 22:51:24,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:24,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982742423] [2021-11-02 22:51:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:24,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:24,123 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:24,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462378180] [2021-11-02 22:51:24,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:51:24,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:24,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:24,125 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:24,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:51:24,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:51:24,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:51:24,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:51:24,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:24,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:24,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982742423] [2021-11-02 22:51:24,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:24,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462378180] [2021-11-02 22:51:24,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462378180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:24,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:24,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:51:24,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971830518] [2021-11-02 22:51:24,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:51:24,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:51:24,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:51:24,590 INFO L87 Difference]: Start difference. First operand 165 states and 190 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:24,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:24,917 INFO L93 Difference]: Finished difference Result 347 states and 396 transitions. [2021-11-02 22:51:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:51:24,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 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 37 [2021-11-02 22:51:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:24,920 INFO L225 Difference]: With dead ends: 347 [2021-11-02 22:51:24,920 INFO L226 Difference]: Without dead ends: 343 [2021-11-02 22:51:24,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:51:24,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-02 22:51:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 193. [2021-11-02 22:51:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.2074468085106382) internal successors, (227), 192 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 227 transitions. [2021-11-02 22:51:24,956 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 227 transitions. Word has length 37 [2021-11-02 22:51:24,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:24,956 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 227 transitions. [2021-11-02 22:51:24,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:24,956 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 227 transitions. [2021-11-02 22:51:24,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:51:24,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:24,957 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:24,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:25,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:25,174 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:25,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:25,174 INFO L85 PathProgramCache]: Analyzing trace with hash -188960243, now seen corresponding path program 1 times [2021-11-02 22:51:25,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:25,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762962167] [2021-11-02 22:51:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:25,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:25,184 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:25,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520425520] [2021-11-02 22:51:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:25,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:25,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:25,187 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:25,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:51:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:25,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:51:25,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:25,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:25,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762962167] [2021-11-02 22:51:25,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:25,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520425520] [2021-11-02 22:51:25,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520425520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:25,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:25,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 22:51:25,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009846066] [2021-11-02 22:51:25,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:51:25,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:25,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:51:25,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:51:25,905 INFO L87 Difference]: Start difference. First operand 193 states and 227 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:26,350 INFO L93 Difference]: Finished difference Result 352 states and 409 transitions. [2021-11-02 22:51:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:51:26,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 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 37 [2021-11-02 22:51:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:26,353 INFO L225 Difference]: With dead ends: 352 [2021-11-02 22:51:26,353 INFO L226 Difference]: Without dead ends: 350 [2021-11-02 22:51:26,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:51:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-02 22:51:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 187. [2021-11-02 22:51:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 186 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 220 transitions. [2021-11-02 22:51:26,392 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 220 transitions. Word has length 37 [2021-11-02 22:51:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:26,392 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 220 transitions. [2021-11-02 22:51:26,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 220 transitions. [2021-11-02 22:51:26,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:51:26,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:26,393 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:26,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:26,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:51:26,601 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:26,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:26,602 INFO L85 PathProgramCache]: Analyzing trace with hash 913672398, now seen corresponding path program 1 times [2021-11-02 22:51:26,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:26,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144654051] [2021-11-02 22:51:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:26,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:26,611 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:26,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623063245] [2021-11-02 22:51:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:26,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:26,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:26,612 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:26,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:51:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:26,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:51:26,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:51:27,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:27,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144654051] [2021-11-02 22:51:27,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:27,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623063245] [2021-11-02 22:51:27,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623063245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:27,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:27,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:51:27,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173749689] [2021-11-02 22:51:27,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:51:27,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:27,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:51:27,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:51:27,040 INFO L87 Difference]: Start difference. First operand 187 states and 220 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:27,118 INFO L93 Difference]: Finished difference Result 323 states and 382 transitions. [2021-11-02 22:51:27,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:51:27,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 38 [2021-11-02 22:51:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:27,120 INFO L225 Difference]: With dead ends: 323 [2021-11-02 22:51:27,120 INFO L226 Difference]: Without dead ends: 196 [2021-11-02 22:51:27,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:51:27,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-02 22:51:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 177. [2021-11-02 22:51:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.2034883720930232) internal successors, (207), 176 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 207 transitions. [2021-11-02 22:51:27,150 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 207 transitions. Word has length 38 [2021-11-02 22:51:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:27,151 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 207 transitions. [2021-11-02 22:51:27,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 207 transitions. [2021-11-02 22:51:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:51:27,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:27,152 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:27,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:27,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:51:27,352 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:27,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:27,353 INFO L85 PathProgramCache]: Analyzing trace with hash 820532868, now seen corresponding path program 2 times [2021-11-02 22:51:27,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:27,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134352936] [2021-11-02 22:51:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:27,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:27,365 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:27,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705417622] [2021-11-02 22:51:27,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:51:27,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:27,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:27,366 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:27,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:51:27,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:51:27,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:51:27,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:51:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:51:27,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:27,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134352936] [2021-11-02 22:51:27,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:27,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705417622] [2021-11-02 22:51:27,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705417622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:27,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:27,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:51:27,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552863388] [2021-11-02 22:51:27,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:51:27,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:27,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:51:27,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:51:27,860 INFO L87 Difference]: Start difference. First operand 177 states and 207 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:27,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:27,940 INFO L93 Difference]: Finished difference Result 206 states and 240 transitions. [2021-11-02 22:51:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:51:27,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-02 22:51:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:27,942 INFO L225 Difference]: With dead ends: 206 [2021-11-02 22:51:27,942 INFO L226 Difference]: Without dead ends: 204 [2021-11-02 22:51:27,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:51:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-02 22:51:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 195. [2021-11-02 22:51:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.2052631578947368) internal successors, (229), 194 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 229 transitions. [2021-11-02 22:51:27,967 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 229 transitions. Word has length 38 [2021-11-02 22:51:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:27,967 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 229 transitions. [2021-11-02 22:51:27,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 229 transitions. [2021-11-02 22:51:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 22:51:27,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:27,968 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:27,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-02 22:51:28,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:51:28,182 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:28,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:28,182 INFO L85 PathProgramCache]: Analyzing trace with hash 2091903451, now seen corresponding path program 1 times [2021-11-02 22:51:28,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:28,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140818156] [2021-11-02 22:51:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:28,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:28,193 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:28,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688045487] [2021-11-02 22:51:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:28,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:28,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:28,194 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:28,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:51:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:28,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:51:28,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:51:28,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:28,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140818156] [2021-11-02 22:51:28,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:28,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688045487] [2021-11-02 22:51:28,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688045487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:28,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:28,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:51:28,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401714141] [2021-11-02 22:51:28,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:51:28,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:28,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:51:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:51:28,716 INFO L87 Difference]: Start difference. First operand 195 states and 229 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:28,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:28,883 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2021-11-02 22:51:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:51:28,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-02 22:51:28,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:28,885 INFO L225 Difference]: With dead ends: 197 [2021-11-02 22:51:28,885 INFO L226 Difference]: Without dead ends: 193 [2021-11-02 22:51:28,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:51:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-02 22:51:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 158. [2021-11-02 22:51:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.1493506493506493) internal successors, (177), 157 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2021-11-02 22:51:28,924 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 39 [2021-11-02 22:51:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:28,924 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2021-11-02 22:51:28,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2021-11-02 22:51:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:51:28,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:28,925 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:28,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-02 22:51:29,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:51:29,138 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:29,138 INFO L85 PathProgramCache]: Analyzing trace with hash 274679198, now seen corresponding path program 1 times [2021-11-02 22:51:29,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:29,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256942682] [2021-11-02 22:51:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:29,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:29,153 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:29,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91877700] [2021-11-02 22:51:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:29,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:29,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:29,157 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:29,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:51:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:29,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-02 22:51:29,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:30,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:30,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256942682] [2021-11-02 22:51:30,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:30,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91877700] [2021-11-02 22:51:30,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91877700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:30,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:30,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 22:51:30,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466718744] [2021-11-02 22:51:30,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:51:30,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:30,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:51:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:51:30,853 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-11-02 22:51:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:31,679 INFO L93 Difference]: Finished difference Result 287 states and 316 transitions. [2021-11-02 22:51:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:51:31,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) Word has length 41 [2021-11-02 22:51:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:31,681 INFO L225 Difference]: With dead ends: 287 [2021-11-02 22:51:31,681 INFO L226 Difference]: Without dead ends: 285 [2021-11-02 22:51:31,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:51:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-02 22:51:31,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 149. [2021-11-02 22:51:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 148 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 167 transitions. [2021-11-02 22:51:31,720 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 167 transitions. Word has length 41 [2021-11-02 22:51:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:31,721 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 167 transitions. [2021-11-02 22:51:31,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-11-02 22:51:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 167 transitions. [2021-11-02 22:51:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:51:31,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:31,722 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:31,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:31,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:31,936 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:31,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1404711062, now seen corresponding path program 1 times [2021-11-02 22:51:31,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:31,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522406863] [2021-11-02 22:51:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:31,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:31,945 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:31,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340415975] [2021-11-02 22:51:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:31,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:31,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:31,963 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:31,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:51:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:32,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 22:51:32,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:33,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:33,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522406863] [2021-11-02 22:51:33,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:33,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340415975] [2021-11-02 22:51:33,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340415975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:33,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:33,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 22:51:33,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486532602] [2021-11-02 22:51:33,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:51:33,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:33,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:51:33,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:51:33,372 INFO L87 Difference]: Start difference. First operand 149 states and 167 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) [2021-11-02 22:51:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:34,185 INFO L93 Difference]: Finished difference Result 323 states and 361 transitions. [2021-11-02 22:51:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:51:34,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) Word has length 41 [2021-11-02 22:51:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:34,190 INFO L225 Difference]: With dead ends: 323 [2021-11-02 22:51:34,190 INFO L226 Difference]: Without dead ends: 315 [2021-11-02 22:51:34,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:51:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-02 22:51:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 179. [2021-11-02 22:51:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 178 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 201 transitions. [2021-11-02 22:51:34,241 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 201 transitions. Word has length 41 [2021-11-02 22:51:34,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:34,241 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 201 transitions. [2021-11-02 22:51:34,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 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) [2021-11-02 22:51:34,242 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 201 transitions. [2021-11-02 22:51:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:51:34,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:34,243 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:34,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:34,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:34,447 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:34,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:34,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1278543847, now seen corresponding path program 2 times [2021-11-02 22:51:34,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:34,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716494504] [2021-11-02 22:51:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:34,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:34,459 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:34,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303997529] [2021-11-02 22:51:34,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:51:34,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:34,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:34,465 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:34,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:51:34,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:51:34,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:51:34,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:51:34,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:35,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:35,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716494504] [2021-11-02 22:51:35,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:35,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303997529] [2021-11-02 22:51:35,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303997529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:35,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:35,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:51:35,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159016248] [2021-11-02 22:51:35,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:51:35,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:35,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:51:35,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:51:35,263 INFO L87 Difference]: Start difference. First operand 179 states and 201 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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) [2021-11-02 22:51:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:35,687 INFO L93 Difference]: Finished difference Result 289 states and 324 transitions. [2021-11-02 22:51:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:51:35,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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) Word has length 41 [2021-11-02 22:51:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:35,690 INFO L225 Difference]: With dead ends: 289 [2021-11-02 22:51:35,690 INFO L226 Difference]: Without dead ends: 287 [2021-11-02 22:51:35,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:51:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-02 22:51:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 243. [2021-11-02 22:51:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 239 states have (on average 1.1589958158995817) internal successors, (277), 242 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 277 transitions. [2021-11-02 22:51:35,761 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 277 transitions. Word has length 41 [2021-11-02 22:51:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:35,761 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 277 transitions. [2021-11-02 22:51:35,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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) [2021-11-02 22:51:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 277 transitions. [2021-11-02 22:51:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:51:35,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:35,762 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:35,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:35,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:35,990 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:35,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1976752845, now seen corresponding path program 2 times [2021-11-02 22:51:35,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:35,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691990412] [2021-11-02 22:51:35,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:35,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:36,011 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:36,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854915450] [2021-11-02 22:51:36,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:51:36,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:36,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:36,013 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:36,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:51:36,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:51:36,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:51:36,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-02 22:51:36,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:40,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:40,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691990412] [2021-11-02 22:51:40,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:40,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854915450] [2021-11-02 22:51:40,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854915450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:40,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:40,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 22:51:40,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107366747] [2021-11-02 22:51:40,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:51:40,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:51:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:51:40,008 INFO L87 Difference]: Start difference. First operand 243 states and 277 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:43,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:43,233 INFO L93 Difference]: Finished difference Result 385 states and 428 transitions. [2021-11-02 22:51:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:51:43,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 22:51:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:43,236 INFO L225 Difference]: With dead ends: 385 [2021-11-02 22:51:43,237 INFO L226 Difference]: Without dead ends: 379 [2021-11-02 22:51:43,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:51:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-02 22:51:43,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 264. [2021-11-02 22:51:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 260 states have (on average 1.1576923076923078) internal successors, (301), 263 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 301 transitions. [2021-11-02 22:51:43,324 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 301 transitions. Word has length 46 [2021-11-02 22:51:43,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:43,324 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 301 transitions. [2021-11-02 22:51:43,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 301 transitions. [2021-11-02 22:51:43,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:51:43,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:43,326 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:43,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:43,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:43,542 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:43,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:43,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2102920060, now seen corresponding path program 2 times [2021-11-02 22:51:43,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:43,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925923763] [2021-11-02 22:51:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:43,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:43,552 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:43,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303077381] [2021-11-02 22:51:43,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:51:43,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:43,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:43,557 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:43,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:51:44,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:51:44,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:51:44,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:51:44,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:44,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:44,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925923763] [2021-11-02 22:51:44,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:44,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303077381] [2021-11-02 22:51:44,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303077381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:44,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:44,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 22:51:44,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978358038] [2021-11-02 22:51:44,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:51:44,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:44,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:51:44,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:51:44,558 INFO L87 Difference]: Start difference. First operand 264 states and 301 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:45,209 INFO L93 Difference]: Finished difference Result 415 states and 464 transitions. [2021-11-02 22:51:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:51:45,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 22:51:45,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:45,213 INFO L225 Difference]: With dead ends: 415 [2021-11-02 22:51:45,213 INFO L226 Difference]: Without dead ends: 413 [2021-11-02 22:51:45,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:51:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-02 22:51:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 209. [2021-11-02 22:51:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 205 states have (on average 1.1512195121951219) internal successors, (236), 208 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 236 transitions. [2021-11-02 22:51:45,279 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 236 transitions. Word has length 46 [2021-11-02 22:51:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:45,280 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 236 transitions. [2021-11-02 22:51:45,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 236 transitions. [2021-11-02 22:51:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:51:45,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:45,281 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:45,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:45,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 22:51:45,494 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:45,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:45,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1437779966, now seen corresponding path program 1 times [2021-11-02 22:51:45,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:45,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466374556] [2021-11-02 22:51:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:45,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:45,515 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:45,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718692920] [2021-11-02 22:51:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:45,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:45,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:45,517 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:45,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:51:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:46,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:51:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:46,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:46,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466374556] [2021-11-02 22:51:46,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:46,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718692920] [2021-11-02 22:51:46,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718692920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:46,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:46,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:51:46,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976818883] [2021-11-02 22:51:46,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:51:46,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:46,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:51:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:51:46,563 INFO L87 Difference]: Start difference. First operand 209 states and 236 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:47,059 INFO L93 Difference]: Finished difference Result 276 states and 306 transitions. [2021-11-02 22:51:47,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:51:47,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 22:51:47,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:47,061 INFO L225 Difference]: With dead ends: 276 [2021-11-02 22:51:47,061 INFO L226 Difference]: Without dead ends: 274 [2021-11-02 22:51:47,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:51:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-02 22:51:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 225. [2021-11-02 22:51:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 221 states have (on average 1.1447963800904977) internal successors, (253), 224 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 253 transitions. [2021-11-02 22:51:47,117 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 253 transitions. Word has length 49 [2021-11-02 22:51:47,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:47,117 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 253 transitions. [2021-11-02 22:51:47,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 253 transitions. [2021-11-02 22:51:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:51:47,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:47,119 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:47,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-02 22:51:47,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:47,334 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:47,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1325811597, now seen corresponding path program 1 times [2021-11-02 22:51:47,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:47,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392555153] [2021-11-02 22:51:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:47,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:47,345 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:47,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291761419] [2021-11-02 22:51:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:47,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:47,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:47,354 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:47,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:51:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:48,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-02 22:51:48,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:49,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:49,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392555153] [2021-11-02 22:51:49,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:49,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291761419] [2021-11-02 22:51:49,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291761419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:49,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:49,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 22:51:49,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698062305] [2021-11-02 22:51:49,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:51:49,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:49,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:51:49,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:51:49,428 INFO L87 Difference]: Start difference. First operand 225 states and 253 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:50,371 INFO L93 Difference]: Finished difference Result 441 states and 487 transitions. [2021-11-02 22:51:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:51:50,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-02 22:51:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:50,375 INFO L225 Difference]: With dead ends: 441 [2021-11-02 22:51:50,375 INFO L226 Difference]: Without dead ends: 439 [2021-11-02 22:51:50,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:51:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-02 22:51:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 204. [2021-11-02 22:51:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.145) internal successors, (229), 203 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 229 transitions. [2021-11-02 22:51:50,450 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 229 transitions. Word has length 50 [2021-11-02 22:51:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:50,451 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 229 transitions. [2021-11-02 22:51:50,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 229 transitions. [2021-11-02 22:51:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:51:50,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:50,452 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:50,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:50,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 22:51:50,653 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:50,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:50,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1323606593, now seen corresponding path program 3 times [2021-11-02 22:51:50,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:50,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441941897] [2021-11-02 22:51:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:50,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:50,672 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:50,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770339543] [2021-11-02 22:51:50,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:51:50,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:50,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:50,674 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:50,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:51:51,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:51:51,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:51:51,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-02 22:51:51,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 22:51:52,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:52,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441941897] [2021-11-02 22:51:52,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:52,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770339543] [2021-11-02 22:51:52,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770339543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:52,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:52,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 22:51:52,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73131510] [2021-11-02 22:51:52,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:51:52,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:52,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:51:52,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:51:52,791 INFO L87 Difference]: Start difference. First operand 204 states and 229 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-11-02 22:51:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:53,679 INFO L93 Difference]: Finished difference Result 459 states and 514 transitions. [2021-11-02 22:51:53,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:51:53,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) Word has length 50 [2021-11-02 22:51:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:53,685 INFO L225 Difference]: With dead ends: 459 [2021-11-02 22:51:53,685 INFO L226 Difference]: Without dead ends: 451 [2021-11-02 22:51:53,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:51:53,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-02 22:51:53,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 234. [2021-11-02 22:51:53,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 230 states have (on average 1.1434782608695653) internal successors, (263), 233 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2021-11-02 22:51:53,783 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 50 [2021-11-02 22:51:53,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:53,784 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2021-11-02 22:51:53,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-11-02 22:51:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2021-11-02 22:51:53,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:51:53,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:53,785 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:53,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:53,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:51:53,998 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:53,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:53,998 INFO L85 PathProgramCache]: Analyzing trace with hash -576599789, now seen corresponding path program 2 times [2021-11-02 22:51:53,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:53,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055097145] [2021-11-02 22:51:53,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:53,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:54,017 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:54,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983383135] [2021-11-02 22:51:54,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:51:54,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:54,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:54,019 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:54,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:51:54,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:51:54,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:51:54,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-02 22:51:54,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:56,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:56,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055097145] [2021-11-02 22:51:56,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:51:56,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983383135] [2021-11-02 22:51:56,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983383135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:56,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:56,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 22:51:56,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518043051] [2021-11-02 22:51:56,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:51:56,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:51:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:51:56,345 INFO L87 Difference]: Start difference. First operand 234 states and 263 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:57,669 INFO L93 Difference]: Finished difference Result 471 states and 527 transitions. [2021-11-02 22:51:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:51:57,670 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 22:51:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:57,673 INFO L225 Difference]: With dead ends: 471 [2021-11-02 22:51:57,673 INFO L226 Difference]: Without dead ends: 469 [2021-11-02 22:51:57,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:51:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-02 22:51:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 251. [2021-11-02 22:51:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 247 states have (on average 1.1376518218623481) internal successors, (281), 250 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 281 transitions. [2021-11-02 22:51:57,783 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 281 transitions. Word has length 53 [2021-11-02 22:51:57,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:57,783 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 281 transitions. [2021-11-02 22:51:57,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:57,783 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 281 transitions. [2021-11-02 22:51:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:51:57,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:57,785 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:57,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:57,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:51:57,988 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:51:57,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:57,988 INFO L85 PathProgramCache]: Analyzing trace with hash 448462549, now seen corresponding path program 4 times [2021-11-02 22:51:57,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:57,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738716049] [2021-11-02 22:51:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:57,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:58,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:51:58,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733597801] [2021-11-02 22:51:58,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:51:58,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:58,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:58,011 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:58,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:51:58,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:51:58,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:51:58,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-02 22:51:58,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:52:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:52:00,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:52:00,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738716049] [2021-11-02 22:52:00,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:52:00,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733597801] [2021-11-02 22:52:00,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733597801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:52:00,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:52:00,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 22:52:00,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427692001] [2021-11-02 22:52:00,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:52:00,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:52:00,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:52:00,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:52:00,898 INFO L87 Difference]: Start difference. First operand 251 states and 281 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:02,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:52:02,808 INFO L93 Difference]: Finished difference Result 456 states and 509 transitions. [2021-11-02 22:52:02,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:52:02,808 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 22:52:02,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:52:02,811 INFO L225 Difference]: With dead ends: 456 [2021-11-02 22:52:02,811 INFO L226 Difference]: Without dead ends: 450 [2021-11-02 22:52:02,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:52:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-02 22:52:02,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 263. [2021-11-02 22:52:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.138996138996139) internal successors, (295), 262 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 295 transitions. [2021-11-02 22:52:02,941 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 295 transitions. Word has length 53 [2021-11-02 22:52:02,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:52:02,942 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 295 transitions. [2021-11-02 22:52:02,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 295 transitions. [2021-11-02 22:52:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:52:02,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:52:02,944 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:52:02,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:52:03,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 22:52:03,170 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:52:03,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:52:03,170 INFO L85 PathProgramCache]: Analyzing trace with hash 843003137, now seen corresponding path program 2 times [2021-11-02 22:52:03,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:52:03,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382763468] [2021-11-02 22:52:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:52:03,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:52:03,198 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:52:03,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829565633] [2021-11-02 22:52:03,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:52:03,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:52:03,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:52:03,200 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:52:03,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:52:04,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:52:04,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:52:04,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-02 22:52:04,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:52:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:52:05,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:52:05,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382763468] [2021-11-02 22:52:05,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:52:05,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829565633] [2021-11-02 22:52:05,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829565633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:52:05,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:52:05,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:52:05,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241405079] [2021-11-02 22:52:05,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:52:05,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:52:05,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:52:05,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:52:05,672 INFO L87 Difference]: Start difference. First operand 263 states and 295 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:52:06,409 INFO L93 Difference]: Finished difference Result 481 states and 537 transitions. [2021-11-02 22:52:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:52:06,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 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 54 [2021-11-02 22:52:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:52:06,411 INFO L225 Difference]: With dead ends: 481 [2021-11-02 22:52:06,411 INFO L226 Difference]: Without dead ends: 479 [2021-11-02 22:52:06,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:52:06,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-02 22:52:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 272. [2021-11-02 22:52:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 268 states have (on average 1.1380597014925373) internal successors, (305), 271 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 305 transitions. [2021-11-02 22:52:06,540 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 305 transitions. Word has length 54 [2021-11-02 22:52:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:52:06,541 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 305 transitions. [2021-11-02 22:52:06,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 305 transitions. [2021-11-02 22:52:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:52:06,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:52:06,541 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:52:06,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-02 22:52:06,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:52:06,742 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:52:06,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:52:06,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1808091586, now seen corresponding path program 5 times [2021-11-02 22:52:06,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:52:06,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275369530] [2021-11-02 22:52:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:52:06,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:52:06,756 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:52:06,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185655074] [2021-11-02 22:52:06,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:52:06,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:52:06,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:52:06,759 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:52:06,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:52:07,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-02 22:52:07,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:52:07,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-02 22:52:07,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:52:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:52:09,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:52:09,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275369530] [2021-11-02 22:52:09,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:52:09,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185655074] [2021-11-02 22:52:09,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185655074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:52:09,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:52:09,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:52:09,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883755611] [2021-11-02 22:52:09,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:52:09,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:52:09,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:52:09,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:52:09,718 INFO L87 Difference]: Start difference. First operand 272 states and 305 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:52:10,672 INFO L93 Difference]: Finished difference Result 522 states and 582 transitions. [2021-11-02 22:52:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:52:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 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 55 [2021-11-02 22:52:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:52:10,675 INFO L225 Difference]: With dead ends: 522 [2021-11-02 22:52:10,675 INFO L226 Difference]: Without dead ends: 514 [2021-11-02 22:52:10,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:52:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-02 22:52:10,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 281. [2021-11-02 22:52:10,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 277 states have (on average 1.1371841155234657) internal successors, (315), 280 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 315 transitions. [2021-11-02 22:52:10,801 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 315 transitions. Word has length 55 [2021-11-02 22:52:10,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:52:10,801 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 315 transitions. [2021-11-02 22:52:10,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:10,802 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 315 transitions. [2021-11-02 22:52:10,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:52:10,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:52:10,803 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:52:10,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-02 22:52:11,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:52:11,026 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:52:11,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:52:11,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1681924371, now seen corresponding path program 3 times [2021-11-02 22:52:11,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:52:11,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827755788] [2021-11-02 22:52:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:52:11,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:52:11,049 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:52:11,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705990680] [2021-11-02 22:52:11,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:52:11,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:52:11,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:52:11,054 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:52:11,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 22:52:12,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:52:12,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:52:12,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:52:12,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:52:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 22:52:13,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:52:13,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827755788] [2021-11-02 22:52:13,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:52:13,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705990680] [2021-11-02 22:52:13,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705990680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:52:13,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:52:13,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:52:13,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009862460] [2021-11-02 22:52:13,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:52:13,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:52:13,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:52:13,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:52:13,742 INFO L87 Difference]: Start difference. First operand 281 states and 315 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:19,805 WARN L207 SmtUtils]: Spent 6.00 s on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2021-11-02 22:52:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:52:23,581 INFO L93 Difference]: Finished difference Result 286 states and 319 transitions. [2021-11-02 22:52:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:52:23,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 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 55 [2021-11-02 22:52:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:52:23,584 INFO L225 Difference]: With dead ends: 286 [2021-11-02 22:52:23,584 INFO L226 Difference]: Without dead ends: 284 [2021-11-02 22:52:23,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:52:23,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-02 22:52:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 190. [2021-11-02 22:52:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 187 states have (on average 1.1176470588235294) internal successors, (209), 189 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:23,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 209 transitions. [2021-11-02 22:52:23,677 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 209 transitions. Word has length 55 [2021-11-02 22:52:23,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:52:23,678 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 209 transitions. [2021-11-02 22:52:23,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 209 transitions. [2021-11-02 22:52:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:52:23,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:52:23,679 INFO L513 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:52:23,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 22:52:23,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:52:23,894 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:52:23,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:52:23,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1717446666, now seen corresponding path program 3 times [2021-11-02 22:52:23,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:52:23,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7684400] [2021-11-02 22:52:23,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:52:23,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:52:23,907 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:52:23,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658128646] [2021-11-02 22:52:23,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:52:23,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:52:23,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:52:23,910 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:52:23,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 22:52:25,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:52:25,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:52:25,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-02 22:52:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:52:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:52:26,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:52:26,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7684400] [2021-11-02 22:52:26,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:52:26,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658128646] [2021-11-02 22:52:26,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658128646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:52:26,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:52:26,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:52:26,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53618556] [2021-11-02 22:52:26,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:52:26,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:52:26,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:52:26,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:52:26,036 INFO L87 Difference]: Start difference. First operand 190 states and 209 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:28,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:52:28,361 INFO L93 Difference]: Finished difference Result 233 states and 254 transitions. [2021-11-02 22:52:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:52:28,361 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-02 22:52:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:52:28,363 INFO L225 Difference]: With dead ends: 233 [2021-11-02 22:52:28,363 INFO L226 Difference]: Without dead ends: 231 [2021-11-02 22:52:28,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:52:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-02 22:52:28,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 170. [2021-11-02 22:52:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 167 states have (on average 1.125748502994012) internal successors, (188), 169 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 188 transitions. [2021-11-02 22:52:28,479 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 188 transitions. Word has length 58 [2021-11-02 22:52:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:52:28,479 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 188 transitions. [2021-11-02 22:52:28,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 188 transitions. [2021-11-02 22:52:28,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:52:28,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:52:28,481 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:52:28,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 22:52:28,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-02 22:52:28,706 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:52:28,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:52:28,706 INFO L85 PathProgramCache]: Analyzing trace with hash -692384328, now seen corresponding path program 6 times [2021-11-02 22:52:28,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:52:28,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893456862] [2021-11-02 22:52:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:52:28,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:52:28,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:52:28,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249780889] [2021-11-02 22:52:28,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:52:28,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:52:28,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:52:28,731 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:52:28,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 22:52:30,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 22:52:30,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:52:30,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-02 22:52:30,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:52:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:52:33,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:52:33,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893456862] [2021-11-02 22:52:33,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:52:33,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249780889] [2021-11-02 22:52:33,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249780889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:52:33,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:52:33,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 22:52:33,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505758603] [2021-11-02 22:52:33,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:52:33,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:52:33,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:52:33,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:52:33,017 INFO L87 Difference]: Start difference. First operand 170 states and 188 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:52:37,427 INFO L93 Difference]: Finished difference Result 374 states and 415 transitions. [2021-11-02 22:52:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:52:37,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 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 58 [2021-11-02 22:52:37,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:52:37,430 INFO L225 Difference]: With dead ends: 374 [2021-11-02 22:52:37,430 INFO L226 Difference]: Without dead ends: 370 [2021-11-02 22:52:37,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 22:52:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-02 22:52:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 185. [2021-11-02 22:52:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 182 states have (on average 1.1263736263736264) internal successors, (205), 184 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 205 transitions. [2021-11-02 22:52:37,547 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 205 transitions. Word has length 58 [2021-11-02 22:52:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:52:37,548 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 205 transitions. [2021-11-02 22:52:37,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 205 transitions. [2021-11-02 22:52:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:52:37,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:52:37,549 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:52:37,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-02 22:52:37,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 22:52:37,749 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:52:37,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:52:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash -196003720, now seen corresponding path program 7 times [2021-11-02 22:52:37,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:52:37,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296764192] [2021-11-02 22:52:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:52:37,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:52:37,766 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:52:37,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379519345] [2021-11-02 22:52:37,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:52:37,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:52:37,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:52:37,768 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:52:37,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 22:52:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:52:39,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-02 22:52:39,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:52:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:52:44,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:52:44,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296764192] [2021-11-02 22:52:44,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:52:44,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379519345] [2021-11-02 22:52:44,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379519345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:52:44,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:52:44,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-02 22:52:44,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200818854] [2021-11-02 22:52:44,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:52:44,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:52:44,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:52:44,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:52:44,375 INFO L87 Difference]: Start difference. First operand 185 states and 205 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:52:53,129 INFO L93 Difference]: Finished difference Result 405 states and 450 transitions. [2021-11-02 22:52:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:52:53,129 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 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 58 [2021-11-02 22:52:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:52:53,131 INFO L225 Difference]: With dead ends: 405 [2021-11-02 22:52:53,131 INFO L226 Difference]: Without dead ends: 397 [2021-11-02 22:52:53,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:52:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-02 22:52:53,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 202. [2021-11-02 22:52:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 199 states have (on average 1.120603015075377) internal successors, (223), 201 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:53,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 223 transitions. [2021-11-02 22:52:53,228 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 223 transitions. Word has length 58 [2021-11-02 22:52:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:52:53,228 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 223 transitions. [2021-11-02 22:52:53,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 223 transitions. [2021-11-02 22:52:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:52:53,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:52:53,229 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:52:53,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-02 22:52:53,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 22:52:53,430 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:52:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:52:53,430 INFO L85 PathProgramCache]: Analyzing trace with hash -915075848, now seen corresponding path program 3 times [2021-11-02 22:52:53,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:52:53,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977012316] [2021-11-02 22:52:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:52:53,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:52:53,447 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:52:53,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309312563] [2021-11-02 22:52:53,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:52:53,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:52:53,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:52:53,454 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:52:53,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 22:52:55,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:52:55,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:52:55,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-02 22:52:55,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:53:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 22:53:00,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:53:00,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977012316] [2021-11-02 22:53:00,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:53:00,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309312563] [2021-11-02 22:53:00,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309312563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:53:00,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:53:00,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 22:53:00,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063191736] [2021-11-02 22:53:00,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:53:00,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:53:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:53:00,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=229, Unknown=1, NotChecked=0, Total=272 [2021-11-02 22:53:00,895 INFO L87 Difference]: Start difference. First operand 202 states and 223 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:38,107 WARN L207 SmtUtils]: Spent 12.26 s on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-11-02 22:54:02,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:02,756 INFO L93 Difference]: Finished difference Result 397 states and 440 transitions. [2021-11-02 22:54:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:54:02,757 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-02 22:54:02,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:02,759 INFO L225 Difference]: With dead ends: 397 [2021-11-02 22:54:02,759 INFO L226 Difference]: Without dead ends: 394 [2021-11-02 22:54:02,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=140, Invalid=786, Unknown=4, NotChecked=0, Total=930 [2021-11-02 22:54:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-02 22:54:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 164. [2021-11-02 22:54:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 162 states have (on average 1.117283950617284) internal successors, (181), 163 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2021-11-02 22:54:02,848 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 62 [2021-11-02 22:54:02,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:02,848 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2021-11-02 22:54:02,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:02,848 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2021-11-02 22:54:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:54:02,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:02,849 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:02,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-02 22:54:03,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-02 22:54:03,049 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:54:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash -360277194, now seen corresponding path program 8 times [2021-11-02 22:54:03,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:03,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796306404] [2021-11-02 22:54:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:03,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:03,076 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:54:03,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046075786] [2021-11-02 22:54:03,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:54:03,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:03,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:03,091 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:03,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 22:54:04,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:54:04,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:54:04,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:54:04,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:05,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:05,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796306404] [2021-11-02 22:54:05,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:54:05,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046075786] [2021-11-02 22:54:05,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046075786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:05,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:54:05,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 22:54:05,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798818535] [2021-11-02 22:54:05,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:54:05,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:54:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:54:05,050 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:05,363 INFO L93 Difference]: Finished difference Result 301 states and 331 transitions. [2021-11-02 22:54:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:54:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 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 62 [2021-11-02 22:54:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:05,368 INFO L225 Difference]: With dead ends: 301 [2021-11-02 22:54:05,368 INFO L226 Difference]: Without dead ends: 242 [2021-11-02 22:54:05,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:54:05,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-02 22:54:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 221. [2021-11-02 22:54:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 219 states have (on average 1.1187214611872147) internal successors, (245), 220 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 245 transitions. [2021-11-02 22:54:05,508 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 245 transitions. Word has length 62 [2021-11-02 22:54:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:05,509 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 245 transitions. [2021-11-02 22:54:05,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 245 transitions. [2021-11-02 22:54:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:54:05,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:05,510 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:05,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-02 22:54:05,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 22:54:05,714 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:54:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1950791892, now seen corresponding path program 9 times [2021-11-02 22:54:05,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:05,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136097251] [2021-11-02 22:54:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:05,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:05,747 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:54:05,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321061967] [2021-11-02 22:54:05,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:54:05,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:05,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:05,750 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:05,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 22:54:07,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:54:07,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:54:07,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-02 22:54:07,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 22:54:08,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:08,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136097251] [2021-11-02 22:54:08,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:54:08,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321061967] [2021-11-02 22:54:08,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321061967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:08,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:54:08,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 22:54:08,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355169361] [2021-11-02 22:54:08,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:54:08,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:08,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:54:08,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:54:08,890 INFO L87 Difference]: Start difference. First operand 221 states and 245 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:09,920 INFO L93 Difference]: Finished difference Result 408 states and 455 transitions. [2021-11-02 22:54:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:54:09,921 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-02 22:54:09,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:09,922 INFO L225 Difference]: With dead ends: 408 [2021-11-02 22:54:09,923 INFO L226 Difference]: Without dead ends: 402 [2021-11-02 22:54:09,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:54:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-02 22:54:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 269. [2021-11-02 22:54:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 267 states have (on average 1.1273408239700375) internal successors, (301), 268 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 301 transitions. [2021-11-02 22:54:10,138 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 301 transitions. Word has length 62 [2021-11-02 22:54:10,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:10,138 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 301 transitions. [2021-11-02 22:54:10,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:10,139 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 301 transitions. [2021-11-02 22:54:10,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:54:10,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:10,140 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:10,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:10,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:10,354 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:54:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:10,355 INFO L85 PathProgramCache]: Analyzing trace with hash 528875381, now seen corresponding path program 10 times [2021-11-02 22:54:10,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:10,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904986012] [2021-11-02 22:54:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:10,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:10,385 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:54:10,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484694320] [2021-11-02 22:54:10,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:54:10,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:10,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:10,386 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:10,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 22:54:12,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:54:12,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:54:12,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-02 22:54:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:18,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:18,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904986012] [2021-11-02 22:54:18,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:54:18,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484694320] [2021-11-02 22:54:18,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484694320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:18,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:54:18,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-02 22:54:18,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727677771] [2021-11-02 22:54:18,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:54:18,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:18,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:54:18,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:54:18,570 INFO L87 Difference]: Start difference. First operand 269 states and 301 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:25,223 INFO L93 Difference]: Finished difference Result 560 states and 626 transitions. [2021-11-02 22:54:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:54:25,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 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 63 [2021-11-02 22:54:25,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:25,228 INFO L225 Difference]: With dead ends: 560 [2021-11-02 22:54:25,228 INFO L226 Difference]: Without dead ends: 554 [2021-11-02 22:54:25,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=177, Invalid=1383, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:54:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-02 22:54:25,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 269. [2021-11-02 22:54:25,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 267 states have (on average 1.1273408239700375) internal successors, (301), 268 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 301 transitions. [2021-11-02 22:54:25,440 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 301 transitions. Word has length 63 [2021-11-02 22:54:25,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:25,440 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 301 transitions. [2021-11-02 22:54:25,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:25,440 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 301 transitions. [2021-11-02 22:54:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:54:25,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:25,442 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:25,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-02 22:54:25,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 22:54:25,646 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:54:25,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1642342893, now seen corresponding path program 11 times [2021-11-02 22:54:25,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:25,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331616975] [2021-11-02 22:54:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:25,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:25,665 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:54:25,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425119566] [2021-11-02 22:54:25,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:54:25,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:25,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:25,667 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:25,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 22:54:27,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 22:54:27,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:54:27,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-02 22:54:27,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:41,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:41,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331616975] [2021-11-02 22:54:41,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:54:41,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425119566] [2021-11-02 22:54:41,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425119566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:41,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:54:41,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-02 22:54:41,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488367462] [2021-11-02 22:54:41,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:54:41,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:41,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:54:41,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:54:41,039 INFO L87 Difference]: Start difference. First operand 269 states and 301 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:52,049 INFO L93 Difference]: Finished difference Result 511 states and 572 transitions. [2021-11-02 22:54:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:54:52,050 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 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 64 [2021-11-02 22:54:52,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:52,052 INFO L225 Difference]: With dead ends: 511 [2021-11-02 22:54:52,052 INFO L226 Difference]: Without dead ends: 505 [2021-11-02 22:54:52,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:54:52,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-11-02 22:54:52,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 278. [2021-11-02 22:54:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 276 states have (on average 1.1268115942028984) internal successors, (311), 277 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 311 transitions. [2021-11-02 22:54:52,293 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 311 transitions. Word has length 64 [2021-11-02 22:54:52,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:52,293 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 311 transitions. [2021-11-02 22:54:52,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 311 transitions. [2021-11-02 22:54:52,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:54:52,294 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:52,295 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:52,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-02 22:54:52,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 22:54:52,498 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:54:52,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash -251115607, now seen corresponding path program 12 times [2021-11-02 22:54:52,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:52,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219564706] [2021-11-02 22:54:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:52,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:52,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:54:52,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020052546] [2021-11-02 22:54:52,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:54:52,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:52,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:52,534 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:52,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 22:54:54,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 22:54:54,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:54:54,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-02 22:54:54,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:54:56,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:56,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219564706] [2021-11-02 22:54:56,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:54:56,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020052546] [2021-11-02 22:54:56,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020052546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:56,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:54:56,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:54:56,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100474276] [2021-11-02 22:54:56,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:54:56,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:56,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:54:56,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:54:56,036 INFO L87 Difference]: Start difference. First operand 278 states and 311 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:57,090 INFO L93 Difference]: Finished difference Result 495 states and 551 transitions. [2021-11-02 22:54:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:54:57,090 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 22:54:57,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:57,092 INFO L225 Difference]: With dead ends: 495 [2021-11-02 22:54:57,092 INFO L226 Difference]: Without dead ends: 489 [2021-11-02 22:54:57,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:54:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-11-02 22:54:57,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 266. [2021-11-02 22:54:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 264 states have (on average 1.125) internal successors, (297), 265 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 297 transitions. [2021-11-02 22:54:57,336 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 297 transitions. Word has length 67 [2021-11-02 22:54:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:57,337 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 297 transitions. [2021-11-02 22:54:57,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 297 transitions. [2021-11-02 22:54:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:54:57,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:57,338 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:57,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:57,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 22:54:57,553 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:54:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:57,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1587775731, now seen corresponding path program 13 times [2021-11-02 22:54:57,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:57,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080263194] [2021-11-02 22:54:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:57,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:57,575 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:54:57,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270350594] [2021-11-02 22:54:57,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:54:57,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:57,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:57,577 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:57,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 22:54:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:59,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-02 22:54:59,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:03,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:03,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080263194] [2021-11-02 22:55:03,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:55:03,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270350594] [2021-11-02 22:55:03,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270350594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:03,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:55:03,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-02 22:55:03,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296688107] [2021-11-02 22:55:03,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:55:03,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:03,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:55:03,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:55:03,126 INFO L87 Difference]: Start difference. First operand 266 states and 297 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:15,255 INFO L93 Difference]: Finished difference Result 569 states and 638 transitions. [2021-11-02 22:55:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:55:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 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 67 [2021-11-02 22:55:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:15,258 INFO L225 Difference]: With dead ends: 569 [2021-11-02 22:55:15,258 INFO L226 Difference]: Without dead ends: 563 [2021-11-02 22:55:15,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:55:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-02 22:55:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 313. [2021-11-02 22:55:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 311 states have (on average 1.1221864951768488) internal successors, (349), 312 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 349 transitions. [2021-11-02 22:55:15,548 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 349 transitions. Word has length 67 [2021-11-02 22:55:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:15,548 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 349 transitions. [2021-11-02 22:55:15,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 349 transitions. [2021-11-02 22:55:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:55:15,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:15,549 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:15,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-02 22:55:15,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:15,766 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:55:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash -478835071, now seen corresponding path program 14 times [2021-11-02 22:55:15,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:15,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441828853] [2021-11-02 22:55:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:15,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:15,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:55:15,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725039518] [2021-11-02 22:55:15,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:55:15,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:15,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:15,789 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:15,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 22:55:18,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:55:18,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:55:18,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-02 22:55:18,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:20,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:20,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441828853] [2021-11-02 22:55:20,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:55:20,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725039518] [2021-11-02 22:55:20,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725039518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:20,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:55:20,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-02 22:55:20,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401233153] [2021-11-02 22:55:20,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:55:20,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:20,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:55:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:55:20,448 INFO L87 Difference]: Start difference. First operand 313 states and 349 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:22,351 INFO L93 Difference]: Finished difference Result 579 states and 646 transitions. [2021-11-02 22:55:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:55:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 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 67 [2021-11-02 22:55:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:22,354 INFO L225 Difference]: With dead ends: 579 [2021-11-02 22:55:22,354 INFO L226 Difference]: Without dead ends: 573 [2021-11-02 22:55:22,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:55:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-02 22:55:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 316. [2021-11-02 22:55:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 314 states have (on average 1.124203821656051) internal successors, (353), 315 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 353 transitions. [2021-11-02 22:55:22,654 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 353 transitions. Word has length 67 [2021-11-02 22:55:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:22,654 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 353 transitions. [2021-11-02 22:55:22,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:22,655 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 353 transitions. [2021-11-02 22:55:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:55:22,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:22,655 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:22,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:22,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:22,856 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:55:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:22,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1931166435, now seen corresponding path program 15 times [2021-11-02 22:55:22,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:22,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067879825] [2021-11-02 22:55:22,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:22,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:22,881 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:55:22,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244691829] [2021-11-02 22:55:22,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:55:22,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:22,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:22,892 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:22,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 22:55:25,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:55:25,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:55:25,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-02 22:55:25,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:55:30,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:30,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067879825] [2021-11-02 22:55:30,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:55:30,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244691829] [2021-11-02 22:55:30,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244691829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:30,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:55:30,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-02 22:55:30,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355016600] [2021-11-02 22:55:30,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:55:30,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:30,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:55:30,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:55:30,395 INFO L87 Difference]: Start difference. First operand 316 states and 353 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:36,016 INFO L93 Difference]: Finished difference Result 594 states and 662 transitions. [2021-11-02 22:55:36,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:55:36,018 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 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 70 [2021-11-02 22:55:36,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:36,022 INFO L225 Difference]: With dead ends: 594 [2021-11-02 22:55:36,022 INFO L226 Difference]: Without dead ends: 590 [2021-11-02 22:55:36,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:55:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-02 22:55:36,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 455. [2021-11-02 22:55:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 453 states have (on average 1.130242825607064) internal successors, (512), 454 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 512 transitions. [2021-11-02 22:55:36,509 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 512 transitions. Word has length 70 [2021-11-02 22:55:36,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:36,510 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 512 transitions. [2021-11-02 22:55:36,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:36,510 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 512 transitions. [2021-11-02 22:55:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:55:36,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:36,512 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:36,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:36,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:36,722 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:55:36,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:36,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1678689471, now seen corresponding path program 16 times [2021-11-02 22:55:36,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:36,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933620614] [2021-11-02 22:55:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:36,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:36,746 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:55:36,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71178552] [2021-11-02 22:55:36,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:55:36,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:36,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:36,747 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:36,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 22:55:39,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:55:39,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:55:39,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-02 22:55:39,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:43,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:43,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933620614] [2021-11-02 22:55:43,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:55:43,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71178552] [2021-11-02 22:55:43,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71178552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:43,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:55:43,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-02 22:55:43,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788332541] [2021-11-02 22:55:43,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:55:43,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:43,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:55:43,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:55:43,538 INFO L87 Difference]: Start difference. First operand 455 states and 512 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:47,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:47,520 INFO L93 Difference]: Finished difference Result 606 states and 679 transitions. [2021-11-02 22:55:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:55:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 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 71 [2021-11-02 22:55:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:47,525 INFO L225 Difference]: With dead ends: 606 [2021-11-02 22:55:47,525 INFO L226 Difference]: Without dead ends: 600 [2021-11-02 22:55:47,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:55:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-11-02 22:55:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 488. [2021-11-02 22:55:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 486 states have (on average 1.131687242798354) internal successors, (550), 487 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 550 transitions. [2021-11-02 22:55:48,080 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 550 transitions. Word has length 71 [2021-11-02 22:55:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:48,080 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 550 transitions. [2021-11-02 22:55:48,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 550 transitions. [2021-11-02 22:55:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 22:55:48,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:48,082 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:48,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-02 22:55:48,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:48,282 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:55:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:48,283 INFO L85 PathProgramCache]: Analyzing trace with hash -939372906, now seen corresponding path program 17 times [2021-11-02 22:55:48,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:48,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683244847] [2021-11-02 22:55:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:48,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:48,336 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:55:48,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950981493] [2021-11-02 22:55:48,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:55:48,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:48,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:48,338 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:48,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 22:55:51,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-02 22:55:51,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:55:51,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-02 22:55:51,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:54,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:54,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683244847] [2021-11-02 22:55:54,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:55:54,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950981493] [2021-11-02 22:55:54,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950981493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:54,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:55:54,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:55:54,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740198383] [2021-11-02 22:55:54,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:55:54,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:55:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:55:54,475 INFO L87 Difference]: Start difference. First operand 488 states and 550 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:57,005 INFO L93 Difference]: Finished difference Result 728 states and 819 transitions. [2021-11-02 22:55:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:55:57,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 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 72 [2021-11-02 22:55:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:57,009 INFO L225 Difference]: With dead ends: 728 [2021-11-02 22:55:57,009 INFO L226 Difference]: Without dead ends: 722 [2021-11-02 22:55:57,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:55:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-11-02 22:55:57,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 509. [2021-11-02 22:55:57,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 507 states have (on average 1.1321499013806706) internal successors, (574), 508 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 574 transitions. [2021-11-02 22:55:57,583 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 574 transitions. Word has length 72 [2021-11-02 22:55:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:57,583 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 574 transitions. [2021-11-02 22:55:57,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 574 transitions. [2021-11-02 22:55:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 22:55:57,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:57,585 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:57,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-02 22:55:57,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:57,790 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:55:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:57,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1288983588, now seen corresponding path program 18 times [2021-11-02 22:55:57,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:57,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382279677] [2021-11-02 22:55:57,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:57,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:57,816 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:55:57,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549307866] [2021-11-02 22:55:57,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:55:57,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:57,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:57,818 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:57,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 22:56:00,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 22:56:00,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:56:00,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-02 22:56:00,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:08,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:08,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382279677] [2021-11-02 22:56:08,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:56:08,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549307866] [2021-11-02 22:56:08,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549307866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:08,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:56:08,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-02 22:56:08,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142350320] [2021-11-02 22:56:08,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:56:08,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:08,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:56:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:56:08,758 INFO L87 Difference]: Start difference. First operand 509 states and 574 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:14,953 INFO L93 Difference]: Finished difference Result 747 states and 837 transitions. [2021-11-02 22:56:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:56:14,954 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 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 72 [2021-11-02 22:56:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:14,957 INFO L225 Difference]: With dead ends: 747 [2021-11-02 22:56:14,957 INFO L226 Difference]: Without dead ends: 741 [2021-11-02 22:56:14,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=227, Invalid=2029, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:56:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-11-02 22:56:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 535. [2021-11-02 22:56:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 533 states have (on average 1.1313320825515947) internal successors, (603), 534 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 603 transitions. [2021-11-02 22:56:15,567 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 603 transitions. Word has length 72 [2021-11-02 22:56:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:15,568 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 603 transitions. [2021-11-02 22:56:15,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 603 transitions. [2021-11-02 22:56:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 22:56:15,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:15,569 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:15,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-02 22:56:15,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:15,786 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:56:15,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:15,786 INFO L85 PathProgramCache]: Analyzing trace with hash -564106466, now seen corresponding path program 19 times [2021-11-02 22:56:15,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:15,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756624517] [2021-11-02 22:56:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:15,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:15,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:56:15,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139967713] [2021-11-02 22:56:15,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:56:15,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:15,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:56:15,817 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:56:15,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 22:56:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:19,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-02 22:56:19,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:21,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:21,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756624517] [2021-11-02 22:56:21,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:56:21,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139967713] [2021-11-02 22:56:21,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139967713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:21,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:56:21,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:56:21,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801522797] [2021-11-02 22:56:21,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:56:21,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:21,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:56:21,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:56:21,610 INFO L87 Difference]: Start difference. First operand 535 states and 603 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:23,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:23,688 INFO L93 Difference]: Finished difference Result 712 states and 797 transitions. [2021-11-02 22:56:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:56:23,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 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 73 [2021-11-02 22:56:23,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:23,691 INFO L225 Difference]: With dead ends: 712 [2021-11-02 22:56:23,691 INFO L226 Difference]: Without dead ends: 706 [2021-11-02 22:56:23,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:56:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-11-02 22:56:24,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 544. [2021-11-02 22:56:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 542 states have (on average 1.1309963099630995) internal successors, (613), 543 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:24,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 613 transitions. [2021-11-02 22:56:24,315 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 613 transitions. Word has length 73 [2021-11-02 22:56:24,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:24,315 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 613 transitions. [2021-11-02 22:56:24,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:24,316 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 613 transitions. [2021-11-02 22:56:24,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 22:56:24,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:24,318 INFO L513 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:24,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:24,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 22:56:24,526 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:56:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2127853152, now seen corresponding path program 20 times [2021-11-02 22:56:24,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:24,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944285741] [2021-11-02 22:56:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:24,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:24,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:56:24,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059479138] [2021-11-02 22:56:24,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:56:24,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:24,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:56:24,557 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:56:24,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 22:56:27,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:56:27,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:56:27,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-02 22:56:27,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:30,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:30,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944285741] [2021-11-02 22:56:30,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:56:30,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059479138] [2021-11-02 22:56:30,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059479138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:30,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:56:30,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-02 22:56:30,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005409319] [2021-11-02 22:56:30,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:56:30,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:56:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:56:30,736 INFO L87 Difference]: Start difference. First operand 544 states and 613 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:33,727 INFO L93 Difference]: Finished difference Result 771 states and 864 transitions. [2021-11-02 22:56:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:56:33,728 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 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 75 [2021-11-02 22:56:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:33,731 INFO L225 Difference]: With dead ends: 771 [2021-11-02 22:56:33,731 INFO L226 Difference]: Without dead ends: 767 [2021-11-02 22:56:33,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:56:33,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-11-02 22:56:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 544. [2021-11-02 22:56:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 542 states have (on average 1.1309963099630995) internal successors, (613), 543 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 613 transitions. [2021-11-02 22:56:34,351 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 613 transitions. Word has length 75 [2021-11-02 22:56:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:34,352 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 613 transitions. [2021-11-02 22:56:34,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:34,352 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 613 transitions. [2021-11-02 22:56:34,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 22:56:34,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:34,353 INFO L513 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:34,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:34,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 22:56:34,582 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:56:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash -111194838, now seen corresponding path program 21 times [2021-11-02 22:56:34,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:34,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061148412] [2021-11-02 22:56:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:34,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:34,612 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:56:34,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184109207] [2021-11-02 22:56:34,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:56:34,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:34,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:56:34,613 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:56:34,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 22:56:38,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:56:38,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:56:38,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 22:56:38,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-02 22:56:38,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:38,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061148412] [2021-11-02 22:56:38,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:56:38,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184109207] [2021-11-02 22:56:38,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184109207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:38,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:56:38,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:56:38,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950070060] [2021-11-02 22:56:38,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:56:38,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:56:38,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:56:38,749 INFO L87 Difference]: Start difference. First operand 544 states and 613 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:51,267 INFO L93 Difference]: Finished difference Result 790 states and 890 transitions. [2021-11-02 22:56:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:56:51,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-02 22:56:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:51,273 INFO L225 Difference]: With dead ends: 790 [2021-11-02 22:56:51,273 INFO L226 Difference]: Without dead ends: 784 [2021-11-02 22:56:51,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:56:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-11-02 22:56:51,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 475. [2021-11-02 22:56:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.135306553911205) internal successors, (537), 474 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:51,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 537 transitions. [2021-11-02 22:56:51,890 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 537 transitions. Word has length 75 [2021-11-02 22:56:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:51,891 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 537 transitions. [2021-11-02 22:56:51,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:56:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 537 transitions. [2021-11-02 22:56:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:56:51,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:51,893 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:51,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-02 22:56:52,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 22:56:52,102 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:56:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:52,102 INFO L85 PathProgramCache]: Analyzing trace with hash -813956894, now seen corresponding path program 22 times [2021-11-02 22:56:52,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:52,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259420101] [2021-11-02 22:56:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:52,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:52,147 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:56:52,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564357024] [2021-11-02 22:56:52,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:56:52,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:52,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:56:52,172 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:56:52,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 22:56:55,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:56:55,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:56:55,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-02 22:56:55,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:58,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:58,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259420101] [2021-11-02 22:56:58,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:56:58,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564357024] [2021-11-02 22:56:58,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564357024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:58,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:56:58,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-02 22:56:58,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533973257] [2021-11-02 22:56:58,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:56:58,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:56:58,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:56:58,831 INFO L87 Difference]: Start difference. First operand 475 states and 537 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:01,229 INFO L93 Difference]: Finished difference Result 701 states and 786 transitions. [2021-11-02 22:57:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:57:01,230 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 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 76 [2021-11-02 22:57:01,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:01,233 INFO L225 Difference]: With dead ends: 701 [2021-11-02 22:57:01,233 INFO L226 Difference]: Without dead ends: 695 [2021-11-02 22:57:01,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 22:57:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-11-02 22:57:01,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 505. [2021-11-02 22:57:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 503 states have (on average 1.1351888667992047) internal successors, (571), 504 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 571 transitions. [2021-11-02 22:57:01,868 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 571 transitions. Word has length 76 [2021-11-02 22:57:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:01,868 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 571 transitions. [2021-11-02 22:57:01,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:01,868 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 571 transitions. [2021-11-02 22:57:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 22:57:01,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:01,870 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:01,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-02 22:57:02,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-02 22:57:02,072 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:57:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:02,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1036115084, now seen corresponding path program 23 times [2021-11-02 22:57:02,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:02,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62460611] [2021-11-02 22:57:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:02,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:02,134 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:57:02,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246020113] [2021-11-02 22:57:02,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:57:02,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:02,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:02,137 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:02,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 22:57:05,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 22:57:05,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:57:05,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:57:05,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 54 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:57:06,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:57:06,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62460611] [2021-11-02 22:57:06,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:57:06,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246020113] [2021-11-02 22:57:06,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246020113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:06,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:57:06,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:57:06,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754718551] [2021-11-02 22:57:06,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:57:06,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:57:06,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:57:06,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:57:06,215 INFO L87 Difference]: Start difference. First operand 505 states and 571 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:07,956 INFO L93 Difference]: Finished difference Result 1113 states and 1262 transitions. [2021-11-02 22:57:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:57:07,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 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 80 [2021-11-02 22:57:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:07,961 INFO L225 Difference]: With dead ends: 1113 [2021-11-02 22:57:07,961 INFO L226 Difference]: Without dead ends: 794 [2021-11-02 22:57:07,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:57:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-11-02 22:57:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 685. [2021-11-02 22:57:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 683 states have (on average 1.136163982430454) internal successors, (776), 684 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:08,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 776 transitions. [2021-11-02 22:57:08,841 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 776 transitions. Word has length 80 [2021-11-02 22:57:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:08,841 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 776 transitions. [2021-11-02 22:57:08,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 776 transitions. [2021-11-02 22:57:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 22:57:08,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:08,843 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:08,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-02 22:57:09,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-02 22:57:09,046 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:57:09,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:09,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1577958058, now seen corresponding path program 24 times [2021-11-02 22:57:09,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:09,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285002902] [2021-11-02 22:57:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:09,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:09,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:57:09,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170669782] [2021-11-02 22:57:09,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:57:09,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:09,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:09,082 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:09,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 22:57:12,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 22:57:12,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:57:12,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 22:57:12,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-02 22:57:14,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:57:14,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285002902] [2021-11-02 22:57:14,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:57:14,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170669782] [2021-11-02 22:57:14,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170669782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:14,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:57:14,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:57:14,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284614717] [2021-11-02 22:57:14,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:57:14,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:57:14,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:57:14,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:57:14,923 INFO L87 Difference]: Start difference. First operand 685 states and 776 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-11-02 22:57:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:16,513 INFO L93 Difference]: Finished difference Result 710 states and 799 transitions. [2021-11-02 22:57:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:57:16,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) Word has length 80 [2021-11-02 22:57:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:16,516 INFO L225 Difference]: With dead ends: 710 [2021-11-02 22:57:16,516 INFO L226 Difference]: Without dead ends: 704 [2021-11-02 22:57:16,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:57:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-02 22:57:17,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 607. [2021-11-02 22:57:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 605 states have (on average 1.133884297520661) internal successors, (686), 606 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 686 transitions. [2021-11-02 22:57:17,360 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 686 transitions. Word has length 80 [2021-11-02 22:57:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:17,361 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 686 transitions. [2021-11-02 22:57:17,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-11-02 22:57:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 686 transitions. [2021-11-02 22:57:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 22:57:17,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:17,362 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:17,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-02 22:57:17,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:17,590 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:57:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2067143681, now seen corresponding path program 25 times [2021-11-02 22:57:17,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:17,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708304942] [2021-11-02 22:57:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:17,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:17,624 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:57:17,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495126847] [2021-11-02 22:57:17,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:57:17,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:17,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:17,631 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:17,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 22:57:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:21,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-02 22:57:21,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:57:27,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:57:27,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708304942] [2021-11-02 22:57:27,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:57:27,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495126847] [2021-11-02 22:57:27,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495126847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:27,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:57:27,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-02 22:57:27,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57545785] [2021-11-02 22:57:27,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:57:27,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:57:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:57:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:57:27,025 INFO L87 Difference]: Start difference. First operand 607 states and 686 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:31,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:31,485 INFO L93 Difference]: Finished difference Result 1068 states and 1204 transitions. [2021-11-02 22:57:31,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:57:31,486 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 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 84 [2021-11-02 22:57:31,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:31,490 INFO L225 Difference]: With dead ends: 1068 [2021-11-02 22:57:31,490 INFO L226 Difference]: Without dead ends: 1064 [2021-11-02 22:57:31,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:57:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-11-02 22:57:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 628. [2021-11-02 22:57:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 626 states have (on average 1.134185303514377) internal successors, (710), 627 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 710 transitions. [2021-11-02 22:57:32,384 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 710 transitions. Word has length 84 [2021-11-02 22:57:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:32,385 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 710 transitions. [2021-11-02 22:57:32,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 710 transitions. [2021-11-02 22:57:32,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 22:57:32,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:32,386 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:32,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-02 22:57:32,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:32,587 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:57:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:32,587 INFO L85 PathProgramCache]: Analyzing trace with hash 819346575, now seen corresponding path program 26 times [2021-11-02 22:57:32,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:32,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107937201] [2021-11-02 22:57:32,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:32,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:32,629 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:57:32,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298961174] [2021-11-02 22:57:32,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:57:32,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:32,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:32,631 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:32,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-02 22:57:36,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:57:36,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:57:36,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-02 22:57:36,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:57:40,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:57:40,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107937201] [2021-11-02 22:57:40,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:57:40,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298961174] [2021-11-02 22:57:40,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298961174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:40,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:57:40,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-02 22:57:40,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950772519] [2021-11-02 22:57:40,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:57:40,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:57:40,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:57:40,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:57:40,607 INFO L87 Difference]: Start difference. First operand 628 states and 710 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:44,816 INFO L93 Difference]: Finished difference Result 1116 states and 1258 transitions. [2021-11-02 22:57:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:57:44,817 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 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 84 [2021-11-02 22:57:44,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:44,821 INFO L225 Difference]: With dead ends: 1116 [2021-11-02 22:57:44,822 INFO L226 Difference]: Without dead ends: 1112 [2021-11-02 22:57:44,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=230, Invalid=2026, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:57:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-11-02 22:57:45,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 654. [2021-11-02 22:57:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 652 states have (on average 1.133435582822086) internal successors, (739), 653 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 739 transitions. [2021-11-02 22:57:45,810 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 739 transitions. Word has length 84 [2021-11-02 22:57:45,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:45,810 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 739 transitions. [2021-11-02 22:57:45,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:45,811 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 739 transitions. [2021-11-02 22:57:45,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 22:57:45,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:45,812 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:45,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-02 22:57:46,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:46,022 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:57:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:46,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1572012179, now seen corresponding path program 27 times [2021-11-02 22:57:46,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:46,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731994497] [2021-11-02 22:57:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:46,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:46,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:57:46,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733848906] [2021-11-02 22:57:46,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:57:46,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:46,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:46,061 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:46,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-02 22:57:50,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:57:50,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:57:50,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-02 22:57:50,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-02 22:57:52,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:57:52,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731994497] [2021-11-02 22:57:52,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:57:52,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733848906] [2021-11-02 22:57:52,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733848906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:52,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:57:52,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:57:52,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423613432] [2021-11-02 22:57:52,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:57:52,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:57:52,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:57:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:57:52,097 INFO L87 Difference]: Start difference. First operand 654 states and 739 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:54,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:54,097 INFO L93 Difference]: Finished difference Result 940 states and 1059 transitions. [2021-11-02 22:57:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:57:54,098 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-02 22:57:54,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:54,103 INFO L225 Difference]: With dead ends: 940 [2021-11-02 22:57:54,104 INFO L226 Difference]: Without dead ends: 934 [2021-11-02 22:57:54,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:57:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-11-02 22:57:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 618. [2021-11-02 22:57:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 616 states have (on average 1.1314935064935066) internal successors, (697), 617 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 697 transitions. [2021-11-02 22:57:55,068 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 697 transitions. Word has length 85 [2021-11-02 22:57:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:55,068 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 697 transitions. [2021-11-02 22:57:55,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:57:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 697 transitions. [2021-11-02 22:57:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 22:57:55,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:55,069 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:55,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-02 22:57:55,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-02 22:57:55,270 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:57:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:55,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1724243093, now seen corresponding path program 28 times [2021-11-02 22:57:55,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:55,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234381140] [2021-11-02 22:57:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:55,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:55,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:57:55,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875382567] [2021-11-02 22:57:55,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:57:55,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:55,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:55,344 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:55,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-02 22:57:59,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:57:59,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:57:59,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-02 22:57:59,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:58:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:58:02,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:02,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234381140] [2021-11-02 22:58:02,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:58:02,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875382567] [2021-11-02 22:58:02,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875382567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:58:02,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:58:02,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 22:58:02,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581101572] [2021-11-02 22:58:02,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:58:02,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:02,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:58:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:58:02,253 INFO L87 Difference]: Start difference. First operand 618 states and 697 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:58:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:09,319 INFO L93 Difference]: Finished difference Result 1244 states and 1405 transitions. [2021-11-02 22:58:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:58:09,319 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 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 87 [2021-11-02 22:58:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:09,324 INFO L225 Difference]: With dead ends: 1244 [2021-11-02 22:58:09,324 INFO L226 Difference]: Without dead ends: 1240 [2021-11-02 22:58:09,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=223, Invalid=2129, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:58:09,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-02 22:58:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 647. [2021-11-02 22:58:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 645 states have (on average 1.1286821705426358) internal successors, (728), 646 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:58:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 728 transitions. [2021-11-02 22:58:10,278 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 728 transitions. Word has length 87 [2021-11-02 22:58:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:10,278 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 728 transitions. [2021-11-02 22:58:10,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:58:10,279 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 728 transitions. [2021-11-02 22:58:10,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-02 22:58:10,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:10,280 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:10,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-02 22:58:10,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-02 22:58:10,481 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:58:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:10,481 INFO L85 PathProgramCache]: Analyzing trace with hash -440966835, now seen corresponding path program 29 times [2021-11-02 22:58:10,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:10,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269343019] [2021-11-02 22:58:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:10,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:10,524 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:58:10,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485926233] [2021-11-02 22:58:10,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:58:10,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:58:10,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:58:10,530 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:58:10,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-02 22:58:15,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 22:58:15,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:58:15,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-02 22:58:15,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:58:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:58:27,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:27,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269343019] [2021-11-02 22:58:27,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:58:27,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485926233] [2021-11-02 22:58:27,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485926233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:58:27,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:58:27,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-02 22:58:27,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506970499] [2021-11-02 22:58:27,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:58:27,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:27,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:58:27,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:58:27,044 INFO L87 Difference]: Start difference. First operand 647 states and 728 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:58:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:34,175 INFO L93 Difference]: Finished difference Result 1077 states and 1213 transitions. [2021-11-02 22:58:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 22:58:34,176 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 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 88 [2021-11-02 22:58:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:34,180 INFO L225 Difference]: With dead ends: 1077 [2021-11-02 22:58:34,180 INFO L226 Difference]: Without dead ends: 1071 [2021-11-02 22:58:34,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:58:34,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-11-02 22:58:35,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 665. [2021-11-02 22:58:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 663 states have (on average 1.1282051282051282) internal successors, (748), 664 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:58:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 748 transitions. [2021-11-02 22:58:35,243 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 748 transitions. Word has length 88 [2021-11-02 22:58:35,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:35,243 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 748 transitions. [2021-11-02 22:58:35,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:58:35,243 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 748 transitions. [2021-11-02 22:58:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 22:58:35,244 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:35,244 INFO L513 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:35,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-11-02 22:58:35,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-02 22:58:35,445 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:58:35,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:35,445 INFO L85 PathProgramCache]: Analyzing trace with hash 796160696, now seen corresponding path program 30 times [2021-11-02 22:58:35,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:35,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14456214] [2021-11-02 22:58:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:35,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:35,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:58:35,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049618] [2021-11-02 22:58:35,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:58:35,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:58:35,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:58:35,490 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:58:35,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-02 22:58:40,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 22:58:40,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:58:40,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-02 22:58:40,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:58:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 51 proven. 59 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-02 22:58:41,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:41,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14456214] [2021-11-02 22:58:41,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:58:41,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049618] [2021-11-02 22:58:41,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:58:41,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:58:41,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:58:41,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577391196] [2021-11-02 22:58:41,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:58:41,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:41,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:58:41,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:58:41,784 INFO L87 Difference]: Start difference. First operand 665 states and 748 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:58:51,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:51,721 INFO L93 Difference]: Finished difference Result 775 states and 863 transitions. [2021-11-02 22:58:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:58:51,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 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 92 [2021-11-02 22:58:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:51,725 INFO L225 Difference]: With dead ends: 775 [2021-11-02 22:58:51,725 INFO L226 Difference]: Without dead ends: 769 [2021-11-02 22:58:51,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=388, Invalid=1682, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 22:58:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-11-02 22:58:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 275. [2021-11-02 22:58:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 273 states have (on average 1.1135531135531136) internal successors, (304), 274 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:58:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 304 transitions. [2021-11-02 22:58:52,194 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 304 transitions. Word has length 92 [2021-11-02 22:58:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:52,195 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 304 transitions. [2021-11-02 22:58:52,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:58:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 304 transitions. [2021-11-02 22:58:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-02 22:58:52,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:52,195 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:52,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-02 22:58:52,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-02 22:58:52,396 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:58:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash 853249930, now seen corresponding path program 31 times [2021-11-02 22:58:52,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:52,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469122355] [2021-11-02 22:58:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:52,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:52,472 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:58:52,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122085024] [2021-11-02 22:58:52,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:58:52,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:58:52,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:58:52,473 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:58:52,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-02 22:58:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:57,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-02 22:58:57,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:00,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:00,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469122355] [2021-11-02 22:59:00,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:59:00,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122085024] [2021-11-02 22:59:00,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122085024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:00,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:59:00,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-02 22:59:00,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754555072] [2021-11-02 22:59:00,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:59:00,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:00,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:59:00,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:59:00,979 INFO L87 Difference]: Start difference. First operand 275 states and 304 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:05,322 INFO L93 Difference]: Finished difference Result 797 states and 880 transitions. [2021-11-02 22:59:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 22:59:05,323 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 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 93 [2021-11-02 22:59:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:05,326 INFO L225 Difference]: With dead ends: 797 [2021-11-02 22:59:05,326 INFO L226 Difference]: Without dead ends: 791 [2021-11-02 22:59:05,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=229, Invalid=2321, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 22:59:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-11-02 22:59:05,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 275. [2021-11-02 22:59:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 273 states have (on average 1.1135531135531136) internal successors, (304), 274 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 304 transitions. [2021-11-02 22:59:05,833 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 304 transitions. Word has length 93 [2021-11-02 22:59:05,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:05,834 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 304 transitions. [2021-11-02 22:59:05,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 304 transitions. [2021-11-02 22:59:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-02 22:59:05,834 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:05,834 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:05,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:06,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:59:06,035 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:59:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:06,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1091180408, now seen corresponding path program 32 times [2021-11-02 22:59:06,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:06,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262059359] [2021-11-02 22:59:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:06,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:06,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:59:06,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19056468] [2021-11-02 22:59:06,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:59:06,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:59:06,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:59:06,080 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:59:06,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-02 22:59:11,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:59:11,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:59:11,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-02 22:59:11,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:26,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:26,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262059359] [2021-11-02 22:59:26,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:59:26,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19056468] [2021-11-02 22:59:26,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19056468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:26,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:59:26,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-02 22:59:26,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422286821] [2021-11-02 22:59:26,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:59:26,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:59:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:59:26,879 INFO L87 Difference]: Start difference. First operand 275 states and 304 transitions. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:05,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:05,170 INFO L93 Difference]: Finished difference Result 782 states and 866 transitions. [2021-11-02 23:00:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:00:05,171 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 states have internal predecessors, (97), 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 97 [2021-11-02 23:00:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:05,175 INFO L225 Difference]: With dead ends: 782 [2021-11-02 23:00:05,175 INFO L226 Difference]: Without dead ends: 776 [2021-11-02 23:00:05,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:00:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-11-02 23:00:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 349. [2021-11-02 23:00:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 347 states have (on average 1.1123919308357348) internal successors, (386), 348 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 386 transitions. [2021-11-02 23:00:05,845 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 386 transitions. Word has length 97 [2021-11-02 23:00:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:05,845 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 386 transitions. [2021-11-02 23:00:05,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 28 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 386 transitions. [2021-11-02 23:00:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-02 23:00:05,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:05,846 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:05,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:06,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-02 23:00:06,047 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:00:06,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:06,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1387249258, now seen corresponding path program 33 times [2021-11-02 23:00:06,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:06,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003878168] [2021-11-02 23:00:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:06,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:06,099 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:00:06,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050911272] [2021-11-02 23:00:06,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:00:06,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:06,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:06,101 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:06,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-02 23:00:11,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:00:11,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:00:11,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-02 23:00:11,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 8 proven. 132 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-02 23:00:13,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:13,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003878168] [2021-11-02 23:00:13,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:00:13,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050911272] [2021-11-02 23:00:13,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050911272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:13,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:00:13,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 23:00:13,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283128326] [2021-11-02 23:00:13,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:00:13,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:00:13,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:00:13,819 INFO L87 Difference]: Start difference. First operand 349 states and 386 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:22,256 INFO L93 Difference]: Finished difference Result 743 states and 825 transitions. [2021-11-02 23:00:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:00:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 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 97 [2021-11-02 23:00:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:22,261 INFO L225 Difference]: With dead ends: 743 [2021-11-02 23:00:22,261 INFO L226 Difference]: Without dead ends: 734 [2021-11-02 23:00:22,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:00:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-02 23:00:23,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 348. [2021-11-02 23:00:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.1095100864553313) internal successors, (385), 347 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 385 transitions. [2021-11-02 23:00:23,095 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 385 transitions. Word has length 97 [2021-11-02 23:00:23,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:23,095 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 385 transitions. [2021-11-02 23:00:23,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 385 transitions. [2021-11-02 23:00:23,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-02 23:00:23,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:23,096 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:23,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:23,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:23,297 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 23:00:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:23,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1598313697, now seen corresponding path program 1 times [2021-11-02 23:00:23,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:23,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666655187] [2021-11-02 23:00:23,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:23,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:23,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 23:00:23,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763163915] [2021-11-02 23:00:23,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:23,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:23,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:23,345 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:23,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-02 23:00:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:28,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-02 23:00:28,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 269 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:00:36,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:36,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666655187] [2021-11-02 23:00:36,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 23:00:36,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763163915] [2021-11-02 23:00:36,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763163915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:36,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:00:36,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 23:00:36,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801172987] [2021-11-02 23:00:36,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:00:36,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:36,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:00:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:00:36,279 INFO L87 Difference]: Start difference. First operand 348 states and 385 transitions. Second operand has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:46,075 INFO L93 Difference]: Finished difference Result 765 states and 849 transitions. [2021-11-02 23:00:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:00:46,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 24 states have internal predecessors, (102), 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 103 [2021-11-02 23:00:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:46,077 INFO L225 Difference]: With dead ends: 765 [2021-11-02 23:00:46,077 INFO L226 Difference]: Without dead ends: 0 [2021-11-02 23:00:46,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=413, Invalid=2557, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:00:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-02 23:00:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-02 23:00:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-02 23:00:46,079 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2021-11-02 23:00:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:46,079 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-02 23:00:46,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:46,079 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-02 23:00:46,079 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-02 23:00:46,081 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 23:00:46,081 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 23:00:46,082 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 23:00:46,082 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 23:00:46,082 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 23:00:46,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-02 23:00:46,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef216a2f-7557-478f-a7f7-508922cfb81f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:46,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-02 23:00:46,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-02 23:00:46,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-02 23:01:59,068 WARN L207 SmtUtils]: Spent 1.21 m on a formula simplification. DAG size of input: 2558 DAG size of output: 2406 [2021-11-02 23:01:59,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-02 23:02:28,878 WARN L207 SmtUtils]: Spent 29.79 s on a formula simplification. DAG size of input: 1783 DAG size of output: 1664 [2021-11-02 23:02:28,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-02 23:03:57,773 WARN L207 SmtUtils]: Spent 1.48 m on a formula simplification. DAG size of input: 2681 DAG size of output: 2515 [2021-11-02 23:03:57,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms