./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY --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 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:43:45,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:43:45,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:43:45,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:43:45,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:43:45,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:43:45,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:43:45,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:43:45,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:43:45,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:43:45,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:43:45,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:43:45,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:43:45,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:43:45,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:43:45,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:43:45,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:43:45,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:43:45,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:43:45,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:43:45,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:43:45,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:43:45,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:43:45,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:43:45,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:43:45,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:43:45,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:43:45,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:43:45,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:43:45,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:43:45,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:43:45,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:43:45,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:43:45,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:43:45,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:43:45,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:43:45,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:43:45,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:43:45,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:43:45,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:43:45,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:43:45,693 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:43:45,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:43:45,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:43:45,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:43:45,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:43:45,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:43:45,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:43:45,727 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:43:45,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:43:45,728 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:43:45,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:43:45,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:43:45,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:43:45,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:43:45,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:43:45,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:43:45,730 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:43:45,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:43:45,730 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:43:45,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:43:45,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:43:45,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:43:45,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:43:45,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:43:45,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:43:45,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:43:45,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:43:45,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:43:45,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:43:45,733 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:43:45,734 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:43:45,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:43:45,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:43:45,734 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_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 [2021-11-07 07:43:46,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:43:46,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:43:46,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:43:46,046 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:43:46,047 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:43:46,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-11-07 07:43:46,121 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/data/c966d1e55/1243469ecb9243d5ad3f8ba0a896ee42/FLAG4df42f063 [2021-11-07 07:43:46,771 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:43:46,772 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-11-07 07:43:46,795 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/data/c966d1e55/1243469ecb9243d5ad3f8ba0a896ee42/FLAG4df42f063 [2021-11-07 07:43:47,094 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/data/c966d1e55/1243469ecb9243d5ad3f8ba0a896ee42 [2021-11-07 07:43:47,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:43:47,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:43:47,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:43:47,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:43:47,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:43:47,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:43:47" (1/1) ... [2021-11-07 07:43:47,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fc8ca55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47, skipping insertion in model container [2021-11-07 07:43:47,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:43:47" (1/1) ... [2021-11-07 07:43:47,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:43:47,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:43:47,335 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_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2021-11-07 07:43:47,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:43:47,372 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:43:47,390 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_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2021-11-07 07:43:47,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:43:47,436 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:43:47,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47 WrapperNode [2021-11-07 07:43:47,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:43:47,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:43:47,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:43:47,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:43:47,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47" (1/1) ... [2021-11-07 07:43:47,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47" (1/1) ... [2021-11-07 07:43:47,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:43:47,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:43:47,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:43:47,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:43:47,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47" (1/1) ... [2021-11-07 07:43:47,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47" (1/1) ... [2021-11-07 07:43:47,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47" (1/1) ... [2021-11-07 07:43:47,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47" (1/1) ... [2021-11-07 07:43:47,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47" (1/1) ... [2021-11-07 07:43:47,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47" (1/1) ... [2021-11-07 07:43:47,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47" (1/1) ... [2021-11-07 07:43:47,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:43:47,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:43:47,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:43:47,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:43:47,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47" (1/1) ... [2021-11-07 07:43:47,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:43:47,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:47,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:43:47,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:43:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:43:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:43:47,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:43:47,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:43:47,880 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:43:47,880 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-07 07:43:47,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:43:47 BoogieIcfgContainer [2021-11-07 07:43:47,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:43:47,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:43:47,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:43:47,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:43:47,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:43:47" (1/3) ... [2021-11-07 07:43:47,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a39ffdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:43:47, skipping insertion in model container [2021-11-07 07:43:47,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:43:47" (2/3) ... [2021-11-07 07:43:47,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a39ffdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:43:47, skipping insertion in model container [2021-11-07 07:43:47,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:43:47" (3/3) ... [2021-11-07 07:43:47,895 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.c [2021-11-07 07:43:47,901 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:43:47,902 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-07 07:43:47,980 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:43:47,988 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 [2021-11-07 07:43:48,001 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-07 07:43:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 07:43:48,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:48,039 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 07:43:48,040 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:48,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:48,047 INFO L85 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-11-07 07:43:48,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:48,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607490404] [2021-11-07 07:43:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:48,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:48,206 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:48,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365941363] [2021-11-07 07:43:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:48,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:48,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:48,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:48,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:43:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:48,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:43:48,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:48,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:48,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607490404] [2021-11-07 07:43:48,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:48,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365941363] [2021-11-07 07:43:48,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365941363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:43:48,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:43:48,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:43:48,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891999071] [2021-11-07 07:43:48,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:43:48,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:43:48,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:43:48,608 INFO L87 Difference]: Start difference. First operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:48,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:48,699 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-11-07 07:43:48,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:43:48,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-07 07:43:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:48,711 INFO L225 Difference]: With dead ends: 54 [2021-11-07 07:43:48,711 INFO L226 Difference]: Without dead ends: 23 [2021-11-07 07:43:48,715 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-07 07:43:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-11-07 07:43:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 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) [2021-11-07 07:43:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-07 07:43:48,750 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2021-11-07 07:43:48,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:48,751 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-07 07:43:48,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:48,751 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-07 07:43:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:43:48,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:48,752 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:48,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:48,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-07 07:43:48,967 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:48,968 INFO L85 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2021-11-07 07:43:48,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:48,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628513477] [2021-11-07 07:43:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:48,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:48,987 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:48,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013882912] [2021-11-07 07:43:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:48,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:48,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:48,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:49,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:43:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:43:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:49,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:49,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628513477] [2021-11-07 07:43:49,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:49,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013882912] [2021-11-07 07:43:49,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013882912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:49,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:49,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-07 07:43:49,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174969578] [2021-11-07 07:43:49,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:43:49,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:43:49,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:49,323 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:49,433 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-11-07 07:43:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:43:49,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 07:43:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:49,436 INFO L225 Difference]: With dead ends: 37 [2021-11-07 07:43:49,436 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 07:43:49,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:43:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 07:43:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-11-07 07:43:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-11-07 07:43:49,444 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2021-11-07 07:43:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:49,445 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-11-07 07:43:49,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-11-07 07:43:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 07:43:49,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:49,446 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:49,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:49,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:49,667 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:49,668 INFO L85 PathProgramCache]: Analyzing trace with hash 757648847, now seen corresponding path program 1 times [2021-11-07 07:43:49,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:49,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202086274] [2021-11-07 07:43:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:49,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:49,685 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:49,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10802410] [2021-11-07 07:43:49,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:49,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:49,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:49,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:49,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:43:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:49,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:43:49,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:49,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:49,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202086274] [2021-11-07 07:43:49,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:49,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10802410] [2021-11-07 07:43:49,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10802410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:49,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:49,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-07 07:43:49,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119890426] [2021-11-07 07:43:49,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:43:49,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:49,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:43:49,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:49,876 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:49,920 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-07 07:43:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:43:49,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 07:43:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:49,922 INFO L225 Difference]: With dead ends: 30 [2021-11-07 07:43:49,922 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 07:43:49,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:43:49,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 07:43:49,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-07 07:43:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-07 07:43:49,929 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 11 [2021-11-07 07:43:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:49,930 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-07 07:43:49,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:49,931 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-07 07:43:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 07:43:49,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:49,932 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:49,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:50,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:50,159 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:50,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1997070616, now seen corresponding path program 1 times [2021-11-07 07:43:50,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:50,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073347225] [2021-11-07 07:43:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:50,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:50,184 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:50,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538827886] [2021-11-07 07:43:50,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:50,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:50,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:50,186 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:50,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:43:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:50,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:43:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:50,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:50,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073347225] [2021-11-07 07:43:50,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:50,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538827886] [2021-11-07 07:43:50,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538827886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:50,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:50,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-07 07:43:50,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653362771] [2021-11-07 07:43:50,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:43:50,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:50,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:43:50,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:43:50,591 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:50,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:50,681 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-07 07:43:50,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:43:50,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-07 07:43:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:50,687 INFO L225 Difference]: With dead ends: 28 [2021-11-07 07:43:50,687 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 07:43:50,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:43:50,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 07:43:50,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-07 07:43:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:50,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-07 07:43:50,706 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13 [2021-11-07 07:43:50,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:50,707 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-07 07:43:50,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:50,708 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-07 07:43:50,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 07:43:50,711 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:50,711 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2021-11-07 07:43:50,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-07 07:43:50,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:50,925 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:50,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:50,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2021-11-07 07:43:50,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:50,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262330840] [2021-11-07 07:43:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:50,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:50,940 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:50,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738442386] [2021-11-07 07:43:50,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:43:50,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:50,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:50,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:50,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:43:51,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:43:51,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:51,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:43:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:51,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:51,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262330840] [2021-11-07 07:43:51,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:51,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738442386] [2021-11-07 07:43:51,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738442386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:51,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:51,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-07 07:43:51,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091680068] [2021-11-07 07:43:51,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:43:51,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:43:51,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:43:51,287 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2021-11-07 07:43:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:51,391 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-07 07:43:51,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:43:51,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 [2021-11-07 07:43:51,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:51,396 INFO L225 Difference]: With dead ends: 41 [2021-11-07 07:43:51,397 INFO L226 Difference]: Without dead ends: 35 [2021-11-07 07:43:51,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:43:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-07 07:43:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-11-07 07:43:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-07 07:43:51,407 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 14 [2021-11-07 07:43:51,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:51,408 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-07 07:43:51,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2021-11-07 07:43:51,408 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-07 07:43:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:43:51,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:51,409 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:51,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:51,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:51,614 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:51,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:51,614 INFO L85 PathProgramCache]: Analyzing trace with hash 699894435, now seen corresponding path program 2 times [2021-11-07 07:43:51,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:51,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986898182] [2021-11-07 07:43:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:51,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:51,627 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:51,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110168835] [2021-11-07 07:43:51,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:43:51,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:51,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:51,629 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:51,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:43:51,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:43:51,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:51,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:43:51,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:51,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:51,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986898182] [2021-11-07 07:43:51,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:51,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110168835] [2021-11-07 07:43:51,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110168835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:51,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:51,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-07 07:43:51,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721049333] [2021-11-07 07:43:51,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:43:51,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:43:51,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:43:51,776 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.5) 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) [2021-11-07 07:43:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:51,861 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-11-07 07:43:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:43:51,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) 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 [2021-11-07 07:43:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:51,868 INFO L225 Difference]: With dead ends: 34 [2021-11-07 07:43:51,868 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 07:43:51,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:43:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 07:43:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-07 07:43:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 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) [2021-11-07 07:43:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-07 07:43:51,873 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 15 [2021-11-07 07:43:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:51,873 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-07 07:43:51,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) 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) [2021-11-07 07:43:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-07 07:43:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 07:43:51,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:51,880 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:51,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:52,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:52,099 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:52,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1664485700, now seen corresponding path program 2 times [2021-11-07 07:43:52,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:52,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52787458] [2021-11-07 07:43:52,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:52,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:52,112 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:52,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771919484] [2021-11-07 07:43:52,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:43:52,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:52,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:52,114 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:52,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:43:52,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:43:52,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:52,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:43:52,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:52,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:52,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52787458] [2021-11-07 07:43:52,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:52,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771919484] [2021-11-07 07:43:52,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771919484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:52,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:52,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 07:43:52,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457734054] [2021-11-07 07:43:52,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:43:52,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:52,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:43:52,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:43:52,510 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-11-07 07:43:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:52,611 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-11-07 07:43:52,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:43:52,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 [2021-11-07 07:43:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:52,613 INFO L225 Difference]: With dead ends: 32 [2021-11-07 07:43:52,614 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 07:43:52,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:43:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 07:43:52,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-07 07:43:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-07 07:43:52,619 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2021-11-07 07:43:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:52,620 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-07 07:43:52,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-11-07 07:43:52,620 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-07 07:43:52,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 07:43:52,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:52,621 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2021-11-07 07:43:52,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:52,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:52,848 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:52,849 INFO L85 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2021-11-07 07:43:52,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:52,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792154471] [2021-11-07 07:43:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:52,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:52,861 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:52,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609771556] [2021-11-07 07:43:52,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:43:52,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:52,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:52,863 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:52,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:43:52,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 07:43:52,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:52,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:43:52,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 07:43:53,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:53,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792154471] [2021-11-07 07:43:53,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:53,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609771556] [2021-11-07 07:43:53,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609771556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:53,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:53,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-07 07:43:53,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316522082] [2021-11-07 07:43:53,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:43:53,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:53,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:43:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:43:53,150 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:53,342 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-07 07:43:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:43:53,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 07:43:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:53,343 INFO L225 Difference]: With dead ends: 28 [2021-11-07 07:43:53,343 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 07:43:53,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:43:53,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 07:43:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-07 07:43:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 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) [2021-11-07 07:43:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-07 07:43:53,349 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-11-07 07:43:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:53,349 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-07 07:43:53,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-07 07:43:53,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 07:43:53,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:53,350 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:53,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:53,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:53,551 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:53,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:53,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1808548489, now seen corresponding path program 3 times [2021-11-07 07:43:53,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:53,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136168071] [2021-11-07 07:43:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:53,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:53,562 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:53,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008736821] [2021-11-07 07:43:53,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:43:53,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:53,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:53,564 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:53,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:43:53,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:43:53,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:53,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:43:53,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:53,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:53,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136168071] [2021-11-07 07:43:53,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:53,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008736821] [2021-11-07 07:43:53,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008736821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:53,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:53,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-07 07:43:53,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769413524] [2021-11-07 07:43:53,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:43:53,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:53,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:43:53,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:43:53,773 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2021-11-07 07:43:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:53,823 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-07 07:43:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:43:53,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 [2021-11-07 07:43:53,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:53,826 INFO L225 Difference]: With dead ends: 28 [2021-11-07 07:43:53,827 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 07:43:53,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:43:53,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 07:43:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-07 07:43:53,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:53,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-07 07:43:53,838 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2021-11-07 07:43:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:53,839 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-07 07:43:53,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2021-11-07 07:43:53,839 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-07 07:43:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 07:43:53,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:53,840 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:53,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:54,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:54,063 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1493484688, now seen corresponding path program 3 times [2021-11-07 07:43:54,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:54,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324786475] [2021-11-07 07:43:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:54,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:54,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:54,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804448485] [2021-11-07 07:43:54,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:43:54,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:54,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:54,075 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:54,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:43:54,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:43:54,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:54,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:43:54,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:54,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:54,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324786475] [2021-11-07 07:43:54,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:54,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804448485] [2021-11-07 07:43:54,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804448485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:54,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:54,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-07 07:43:54,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258047635] [2021-11-07 07:43:54,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:43:54,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:54,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:43:54,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:43:54,521 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2021-11-07 07:43:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:54,621 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-07 07:43:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:43:54,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 [2021-11-07 07:43:54,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:54,622 INFO L225 Difference]: With dead ends: 30 [2021-11-07 07:43:54,622 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 07:43:54,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:43:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 07:43:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-07 07:43:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 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) [2021-11-07 07:43:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-07 07:43:54,635 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2021-11-07 07:43:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:54,637 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-07 07:43:54,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2021-11-07 07:43:54,638 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-07 07:43:54,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 07:43:54,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:54,639 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:54,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:54,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:43:54,847 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:54,848 INFO L85 PathProgramCache]: Analyzing trace with hash 754083403, now seen corresponding path program 4 times [2021-11-07 07:43:54,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:54,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113989732] [2021-11-07 07:43:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:54,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:54,865 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:54,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592187675] [2021-11-07 07:43:54,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:43:54,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:54,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:54,871 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:54,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:43:55,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:43:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:55,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:43:55,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:55,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:55,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113989732] [2021-11-07 07:43:55,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:55,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592187675] [2021-11-07 07:43:55,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592187675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:55,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:55,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-07 07:43:55,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235506126] [2021-11-07 07:43:55,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:43:55,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:43:55,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:43:55,171 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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) [2021-11-07 07:43:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:55,242 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-11-07 07:43:55,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:43:55,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 [2021-11-07 07:43:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:55,243 INFO L225 Difference]: With dead ends: 32 [2021-11-07 07:43:55,243 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 07:43:55,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:43:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 07:43:55,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-07 07:43:55,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:55,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-07 07:43:55,250 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2021-11-07 07:43:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:55,250 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-07 07:43:55,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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) [2021-11-07 07:43:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-07 07:43:55,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 07:43:55,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:55,251 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:55,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:55,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:43:55,475 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:55,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:55,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1128495004, now seen corresponding path program 4 times [2021-11-07 07:43:55,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:55,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791435723] [2021-11-07 07:43:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:55,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:55,486 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:55,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094038679] [2021-11-07 07:43:55,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:43:55,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:55,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:55,503 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:55,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:43:55,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:43:55,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:55,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:43:55,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:55,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:55,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791435723] [2021-11-07 07:43:55,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:55,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094038679] [2021-11-07 07:43:55,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094038679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:55,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:55,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 07:43:55,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105975620] [2021-11-07 07:43:55,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:43:55,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:55,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:43:55,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:43:55,996 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:56,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:56,120 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-07 07:43:56,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:43:56,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-11-07 07:43:56,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:56,121 INFO L225 Difference]: With dead ends: 34 [2021-11-07 07:43:56,121 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 07:43:56,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:43:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 07:43:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-07 07:43:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-07 07:43:56,127 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2021-11-07 07:43:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:56,127 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-07 07:43:56,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-07 07:43:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:43:56,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:56,129 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:56,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:56,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:43:56,355 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:56,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2117565153, now seen corresponding path program 5 times [2021-11-07 07:43:56,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:56,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245534746] [2021-11-07 07:43:56,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:56,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:56,366 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:56,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952605591] [2021-11-07 07:43:56,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:43:56,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:56,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:56,367 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:56,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:43:56,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:43:56,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:56,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:43:56,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:56,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:56,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245534746] [2021-11-07 07:43:56,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:56,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952605591] [2021-11-07 07:43:56,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952605591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:56,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:56,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-07 07:43:56,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868998974] [2021-11-07 07:43:56,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:43:56,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:56,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:43:56,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:43:56,723 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-11-07 07:43:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:56,793 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-11-07 07:43:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:43:56,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 [2021-11-07 07:43:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:56,795 INFO L225 Difference]: With dead ends: 36 [2021-11-07 07:43:56,795 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 07:43:56,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:43:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 07:43:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-07 07:43:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-11-07 07:43:56,808 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-11-07 07:43:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:56,811 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-11-07 07:43:56,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-11-07 07:43:56,811 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-11-07 07:43:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:43:56,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:56,812 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:56,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:57,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:43:57,020 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:57,021 INFO L85 PathProgramCache]: Analyzing trace with hash 881214008, now seen corresponding path program 5 times [2021-11-07 07:43:57,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:57,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397528206] [2021-11-07 07:43:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:57,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:57,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:57,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131471196] [2021-11-07 07:43:57,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:43:57,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:57,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:57,055 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:57,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:43:57,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:43:57,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:57,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:43:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:57,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:57,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397528206] [2021-11-07 07:43:57,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:57,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131471196] [2021-11-07 07:43:57,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131471196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:57,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:57,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-07 07:43:57,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735440654] [2021-11-07 07:43:57,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:43:57,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:43:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:43:57,818 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:57,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:57,954 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-11-07 07:43:57,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:43:57,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 07:43:57,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:57,955 INFO L225 Difference]: With dead ends: 38 [2021-11-07 07:43:57,955 INFO L226 Difference]: Without dead ends: 34 [2021-11-07 07:43:57,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:43:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-07 07:43:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-07 07:43:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 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) [2021-11-07 07:43:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-11-07 07:43:57,960 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-11-07 07:43:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:57,961 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-11-07 07:43:57,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-11-07 07:43:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 07:43:57,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:57,962 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:57,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:58,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:43:58,162 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:58,163 INFO L85 PathProgramCache]: Analyzing trace with hash 772479475, now seen corresponding path program 6 times [2021-11-07 07:43:58,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:58,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277423137] [2021-11-07 07:43:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:58,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:58,185 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:58,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707060412] [2021-11-07 07:43:58,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:43:58,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:58,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:58,186 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:58,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:43:58,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:43:58,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:58,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:43:58,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:58,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:58,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277423137] [2021-11-07 07:43:58,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:58,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707060412] [2021-11-07 07:43:58,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707060412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:58,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:58,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-07 07:43:58,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058249904] [2021-11-07 07:43:58,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:43:58,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:58,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:43:58,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:43:58,557 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:58,636 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-07 07:43:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:43:58,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 07:43:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:58,637 INFO L225 Difference]: With dead ends: 40 [2021-11-07 07:43:58,637 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 07:43:58,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:43:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 07:43:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-07 07:43:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 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) [2021-11-07 07:43:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-07 07:43:58,644 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2021-11-07 07:43:58,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:58,644 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-07 07:43:58,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-07 07:43:58,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 07:43:58,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:58,646 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:58,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:58,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:58,859 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:58,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:58,860 INFO L85 PathProgramCache]: Analyzing trace with hash -629738996, now seen corresponding path program 6 times [2021-11-07 07:43:58,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:58,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557588955] [2021-11-07 07:43:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:58,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:58,868 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:43:58,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628898715] [2021-11-07 07:43:58,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:43:58,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:58,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:58,887 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:58,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:43:59,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:43:59,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:59,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 07:43:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:59,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:59,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557588955] [2021-11-07 07:43:59,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:43:59,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628898715] [2021-11-07 07:43:59,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628898715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:59,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:43:59,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-07 07:43:59,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418559619] [2021-11-07 07:43:59,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:43:59,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:59,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:43:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:43:59,698 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:00,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:00,041 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-11-07 07:44:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:44:00,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 07:44:00,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:00,042 INFO L225 Difference]: With dead ends: 42 [2021-11-07 07:44:00,042 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 07:44:00,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:44:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 07:44:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-07 07:44:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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) [2021-11-07 07:44:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-11-07 07:44:00,049 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2021-11-07 07:44:00,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:00,049 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-11-07 07:44:00,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-11-07 07:44:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 07:44:00,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:00,050 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:00,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-07 07:44:00,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:00,257 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:00,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:00,257 INFO L85 PathProgramCache]: Analyzing trace with hash 445588679, now seen corresponding path program 7 times [2021-11-07 07:44:00,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:00,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393948098] [2021-11-07 07:44:00,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:00,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:00,269 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:00,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952380841] [2021-11-07 07:44:00,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:00,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:00,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:00,270 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:00,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:44:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:00,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:44:00,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:00,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:00,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393948098] [2021-11-07 07:44:00,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:00,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952380841] [2021-11-07 07:44:00,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952380841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:00,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:00,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-07 07:44:00,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192695347] [2021-11-07 07:44:00,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:44:00,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:00,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:44:00,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:44:00,629 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-11-07 07:44:00,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:00,725 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-07 07:44:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:44:00,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 35 [2021-11-07 07:44:00,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:00,726 INFO L225 Difference]: With dead ends: 44 [2021-11-07 07:44:00,726 INFO L226 Difference]: Without dead ends: 40 [2021-11-07 07:44:00,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:44:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-07 07:44:00,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-07 07:44:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 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) [2021-11-07 07:44:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-07 07:44:00,733 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2021-11-07 07:44:00,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:00,733 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-07 07:44:00,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-11-07 07:44:00,734 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-07 07:44:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 07:44:00,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:00,735 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:00,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:00,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:44:00,951 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:00,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:00,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1239181344, now seen corresponding path program 7 times [2021-11-07 07:44:00,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:00,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377873115] [2021-11-07 07:44:00,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:00,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:00,959 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:00,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109616042] [2021-11-07 07:44:00,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:00,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:00,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:00,961 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:00,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:44:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:01,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 07:44:01,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:01,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:01,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377873115] [2021-11-07 07:44:01,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:01,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109616042] [2021-11-07 07:44:01,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109616042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:01,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:01,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-07 07:44:01,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417483217] [2021-11-07 07:44:01,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:44:01,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:01,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:44:01,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:44:01,975 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-11-07 07:44:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:02,314 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-07 07:44:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:44:02,314 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 [2021-11-07 07:44:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:02,315 INFO L225 Difference]: With dead ends: 46 [2021-11-07 07:44:02,315 INFO L226 Difference]: Without dead ends: 42 [2021-11-07 07:44:02,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:44:02,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-07 07:44:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-07 07:44:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-07 07:44:02,322 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2021-11-07 07:44:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:02,323 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-07 07:44:02,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-11-07 07:44:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-07 07:44:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 07:44:02,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:02,324 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:02,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:02,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:44:02,527 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1112955493, now seen corresponding path program 8 times [2021-11-07 07:44:02,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:02,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518650033] [2021-11-07 07:44:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:02,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:02,535 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:02,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500434719] [2021-11-07 07:44:02,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:02,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:02,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:02,537 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:02,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:44:02,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:02,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:02,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:44:02,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:02,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:02,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518650033] [2021-11-07 07:44:02,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:02,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500434719] [2021-11-07 07:44:02,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500434719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:02,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:02,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-07 07:44:02,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076764681] [2021-11-07 07:44:02,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:44:02,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:44:02,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:44:02,997 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-11-07 07:44:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:03,096 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-11-07 07:44:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:44:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) Word has length 39 [2021-11-07 07:44:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:03,098 INFO L225 Difference]: With dead ends: 48 [2021-11-07 07:44:03,098 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 07:44:03,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:44:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 07:44:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-07 07:44:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-07 07:44:03,105 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2021-11-07 07:44:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:03,105 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-07 07:44:03,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-11-07 07:44:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-07 07:44:03,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 07:44:03,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:03,106 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:03,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:03,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:03,319 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:03,320 INFO L85 PathProgramCache]: Analyzing trace with hash -56544332, now seen corresponding path program 8 times [2021-11-07 07:44:03,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:03,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651823898] [2021-11-07 07:44:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:03,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:03,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:03,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020949144] [2021-11-07 07:44:03,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:03,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:03,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:03,328 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:03,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:44:04,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:04,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:04,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 07:44:04,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:04,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:04,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651823898] [2021-11-07 07:44:04,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:04,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020949144] [2021-11-07 07:44:04,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020949144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:04,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:04,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-07 07:44:04,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419207892] [2021-11-07 07:44:04,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:44:04,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:04,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:44:04,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:44:04,645 INFO L87 Difference]: Start difference. First operand 44 states and 45 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) [2021-11-07 07:44:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:04,876 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-11-07 07:44:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:44:04,877 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 41 [2021-11-07 07:44:04,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:04,878 INFO L225 Difference]: With dead ends: 50 [2021-11-07 07:44:04,878 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 07:44:04,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:44:04,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 07:44:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-07 07:44:04,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-11-07 07:44:04,883 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2021-11-07 07:44:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:04,883 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-11-07 07:44:04,884 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) [2021-11-07 07:44:04,884 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-11-07 07:44:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 07:44:04,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:04,884 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:04,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:05,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:05,096 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:05,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1529846895, now seen corresponding path program 9 times [2021-11-07 07:44:05,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:05,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853676993] [2021-11-07 07:44:05,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:05,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:05,103 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:05,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967772890] [2021-11-07 07:44:05,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:05,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:05,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:05,105 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:05,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:44:05,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 07:44:05,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:05,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:44:05,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:05,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:05,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853676993] [2021-11-07 07:44:05,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:05,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967772890] [2021-11-07 07:44:05,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967772890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:05,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:05,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-07 07:44:05,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884833073] [2021-11-07 07:44:05,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:44:05,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:05,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:44:05,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:44:05,626 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:05,746 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-11-07 07:44:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:44:05,747 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-07 07:44:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:05,747 INFO L225 Difference]: With dead ends: 52 [2021-11-07 07:44:05,747 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 07:44:05,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:44:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 07:44:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-07 07:44:05,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 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) [2021-11-07 07:44:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-11-07 07:44:05,762 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2021-11-07 07:44:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:05,763 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-11-07 07:44:05,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-11-07 07:44:05,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 07:44:05,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:05,764 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:05,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:05,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 07:44:05,991 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:05,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1350878600, now seen corresponding path program 9 times [2021-11-07 07:44:05,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:05,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613711864] [2021-11-07 07:44:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:05,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:05,998 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:05,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036979132] [2021-11-07 07:44:05,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:05,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:05,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:06,000 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:06,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:44:06,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 07:44:06,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:06,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 07:44:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:07,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:07,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613711864] [2021-11-07 07:44:07,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:07,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036979132] [2021-11-07 07:44:07,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036979132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:07,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:07,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-07 07:44:07,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363885995] [2021-11-07 07:44:07,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:44:07,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:07,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:44:07,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:44:07,381 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:07,663 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-11-07 07:44:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:44:07,665 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-07 07:44:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:07,666 INFO L225 Difference]: With dead ends: 54 [2021-11-07 07:44:07,666 INFO L226 Difference]: Without dead ends: 50 [2021-11-07 07:44:07,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:44:07,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-07 07:44:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-07 07:44:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 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) [2021-11-07 07:44:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-11-07 07:44:07,672 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2021-11-07 07:44:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:07,672 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-11-07 07:44:07,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-11-07 07:44:07,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 07:44:07,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:07,673 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:07,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:07,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:07,881 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1148586307, now seen corresponding path program 10 times [2021-11-07 07:44:07,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:07,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986220818] [2021-11-07 07:44:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:07,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:07,896 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:07,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137500450] [2021-11-07 07:44:07,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:44:07,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:07,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:07,898 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:07,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 07:44:08,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:44:08,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:08,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:44:08,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:08,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:08,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986220818] [2021-11-07 07:44:08,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:08,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137500450] [2021-11-07 07:44:08,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137500450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:08,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:08,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-07 07:44:08,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862706219] [2021-11-07 07:44:08,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:44:08,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:08,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:44:08,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:44:08,463 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:08,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:08,615 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-11-07 07:44:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:44:08,615 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-07 07:44:08,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:08,616 INFO L225 Difference]: With dead ends: 56 [2021-11-07 07:44:08,616 INFO L226 Difference]: Without dead ends: 52 [2021-11-07 07:44:08,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:44:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-07 07:44:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-07 07:44:08,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 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) [2021-11-07 07:44:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-11-07 07:44:08,624 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2021-11-07 07:44:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:08,624 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-11-07 07:44:08,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-11-07 07:44:08,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 07:44:08,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:08,625 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:08,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:08,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 07:44:08,842 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash 31673692, now seen corresponding path program 10 times [2021-11-07 07:44:08,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:08,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148379609] [2021-11-07 07:44:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:08,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:08,854 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:08,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600284160] [2021-11-07 07:44:08,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:44:08,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:08,856 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:08,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 07:44:10,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:44:10,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:10,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 07:44:10,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:10,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:10,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148379609] [2021-11-07 07:44:10,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:10,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600284160] [2021-11-07 07:44:10,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600284160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:10,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:10,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-07 07:44:10,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446696471] [2021-11-07 07:44:10,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:44:10,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:10,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:44:10,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:44:10,894 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2021-11-07 07:44:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:11,270 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-11-07 07:44:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:44:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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 [2021-11-07 07:44:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:11,271 INFO L225 Difference]: With dead ends: 58 [2021-11-07 07:44:11,272 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 07:44:11,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:44:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 07:44:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-07 07:44:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 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) [2021-11-07 07:44:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-07 07:44:11,277 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2021-11-07 07:44:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:11,277 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-07 07:44:11,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 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) [2021-11-07 07:44:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-07 07:44:11,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 07:44:11,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:11,278 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:11,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:11,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:11,479 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:11,479 INFO L85 PathProgramCache]: Analyzing trace with hash 408022039, now seen corresponding path program 11 times [2021-11-07 07:44:11,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:11,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275644192] [2021-11-07 07:44:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:11,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:11,495 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:11,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752779146] [2021-11-07 07:44:11,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:44:11,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:11,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:11,496 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:11,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 07:44:12,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 07:44:12,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:12,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:44:12,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:12,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:12,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275644192] [2021-11-07 07:44:12,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:12,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752779146] [2021-11-07 07:44:12,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752779146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:12,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:12,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-07 07:44:12,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237080315] [2021-11-07 07:44:12,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:44:12,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:12,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:44:12,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:44:12,478 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-11-07 07:44:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:12,623 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-11-07 07:44:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:44:12,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 51 [2021-11-07 07:44:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:12,624 INFO L225 Difference]: With dead ends: 60 [2021-11-07 07:44:12,624 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 07:44:12,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:44:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 07:44:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-07 07:44:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 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) [2021-11-07 07:44:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-11-07 07:44:12,630 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2021-11-07 07:44:12,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:12,630 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-11-07 07:44:12,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-11-07 07:44:12,631 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-11-07 07:44:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 07:44:12,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:12,632 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:12,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:12,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:12,839 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:12,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1313983280, now seen corresponding path program 11 times [2021-11-07 07:44:12,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:12,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924410556] [2021-11-07 07:44:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:12,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:12,857 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:12,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368313552] [2021-11-07 07:44:12,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:44:12,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:12,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:12,867 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:12,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 07:44:13,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 07:44:13,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:13,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 07:44:13,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:14,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:14,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924410556] [2021-11-07 07:44:14,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:14,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368313552] [2021-11-07 07:44:14,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368313552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:14,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:14,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-07 07:44:14,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273230885] [2021-11-07 07:44:14,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:44:14,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:14,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:44:14,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:44:14,231 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2021-11-07 07:44:14,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:14,665 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-11-07 07:44:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:44:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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 [2021-11-07 07:44:14,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:14,666 INFO L225 Difference]: With dead ends: 62 [2021-11-07 07:44:14,666 INFO L226 Difference]: Without dead ends: 58 [2021-11-07 07:44:14,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:44:14,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-07 07:44:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-07 07:44:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 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) [2021-11-07 07:44:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-11-07 07:44:14,672 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2021-11-07 07:44:14,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:14,672 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-11-07 07:44:14,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 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) [2021-11-07 07:44:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-11-07 07:44:14,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 07:44:14,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:14,673 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:14,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:14,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 07:44:14,880 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash 51922155, now seen corresponding path program 12 times [2021-11-07 07:44:14,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:14,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50775470] [2021-11-07 07:44:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:14,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:14,888 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:14,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033314921] [2021-11-07 07:44:14,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:44:14,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:14,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:14,890 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:14,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 07:44:16,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 07:44:16,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:16,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:44:16,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:16,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:16,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50775470] [2021-11-07 07:44:16,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:16,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033314921] [2021-11-07 07:44:16,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033314921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:16,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:16,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-07 07:44:16,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715161076] [2021-11-07 07:44:16,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:44:16,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:16,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:44:16,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:44:16,336 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 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) [2021-11-07 07:44:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:16,502 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-11-07 07:44:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:44:16,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 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 [2021-11-07 07:44:16,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:16,503 INFO L225 Difference]: With dead ends: 64 [2021-11-07 07:44:16,503 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 07:44:16,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:44:16,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 07:44:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-07 07:44:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-11-07 07:44:16,509 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2021-11-07 07:44:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:16,510 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-11-07 07:44:16,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 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) [2021-11-07 07:44:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-11-07 07:44:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 07:44:16,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:16,511 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:16,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-07 07:44:16,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 07:44:16,720 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:16,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1595588860, now seen corresponding path program 12 times [2021-11-07 07:44:16,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:16,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639210256] [2021-11-07 07:44:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:16,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:16,728 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:16,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590727052] [2021-11-07 07:44:16,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:44:16,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:16,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:16,733 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:16,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 07:44:18,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 07:44:18,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-07 07:44:18,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:18,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:18,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639210256] [2021-11-07 07:44:18,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:18,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590727052] [2021-11-07 07:44:18,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590727052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:18,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:18,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-07 07:44:18,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832528574] [2021-11-07 07:44:18,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:44:18,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:18,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:44:18,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:44:18,765 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-11-07 07:44:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:19,139 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-11-07 07:44:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:44:19,139 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) Word has length 57 [2021-11-07 07:44:19,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:19,140 INFO L225 Difference]: With dead ends: 66 [2021-11-07 07:44:19,140 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 07:44:19,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:44:19,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 07:44:19,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-07 07:44:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 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) [2021-11-07 07:44:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-11-07 07:44:19,146 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2021-11-07 07:44:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:19,146 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-11-07 07:44:19,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-11-07 07:44:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-11-07 07:44:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 07:44:19,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:19,147 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:19,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:19,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 07:44:19,351 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:19,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:19,351 INFO L85 PathProgramCache]: Analyzing trace with hash -23194689, now seen corresponding path program 13 times [2021-11-07 07:44:19,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:19,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951389798] [2021-11-07 07:44:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:19,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:19,363 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:19,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989160690] [2021-11-07 07:44:19,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:19,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:19,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:19,384 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:19,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 07:44:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:19,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 07:44:19,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:20,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:20,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951389798] [2021-11-07 07:44:20,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:20,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989160690] [2021-11-07 07:44:20,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989160690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:20,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:20,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-07 07:44:20,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413289689] [2021-11-07 07:44:20,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:44:20,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:44:20,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:44:20,227 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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) [2021-11-07 07:44:20,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:20,403 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-11-07 07:44:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:44:20,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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 59 [2021-11-07 07:44:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:20,404 INFO L225 Difference]: With dead ends: 68 [2021-11-07 07:44:20,404 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 07:44:20,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:44:20,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 07:44:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-07 07:44:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-11-07 07:44:20,410 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2021-11-07 07:44:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:20,411 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-11-07 07:44:20,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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) [2021-11-07 07:44:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-11-07 07:44:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 07:44:20,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:20,412 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:20,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:20,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:44:20,625 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:20,625 INFO L85 PathProgramCache]: Analyzing trace with hash -768431912, now seen corresponding path program 13 times [2021-11-07 07:44:20,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:20,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849556738] [2021-11-07 07:44:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:20,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:20,639 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:20,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365916018] [2021-11-07 07:44:20,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:20,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:20,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:20,641 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:20,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 07:44:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:22,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 07:44:22,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:22,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:22,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849556738] [2021-11-07 07:44:22,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:22,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365916018] [2021-11-07 07:44:22,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365916018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:22,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:22,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-07 07:44:22,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270226568] [2021-11-07 07:44:22,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:44:22,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:22,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:44:22,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:44:22,548 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:23,097 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-07 07:44:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:44:23,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 07:44:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:23,098 INFO L225 Difference]: With dead ends: 70 [2021-11-07 07:44:23,099 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 07:44:23,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:44:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 07:44:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-07 07:44:23,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 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) [2021-11-07 07:44:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-11-07 07:44:23,105 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2021-11-07 07:44:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:23,106 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-11-07 07:44:23,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-11-07 07:44:23,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 07:44:23,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:23,107 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:23,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:23,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:23,314 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:23,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:23,314 INFO L85 PathProgramCache]: Analyzing trace with hash 305682579, now seen corresponding path program 14 times [2021-11-07 07:44:23,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:23,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773781732] [2021-11-07 07:44:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:23,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:23,324 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:23,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40994798] [2021-11-07 07:44:23,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:23,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:23,330 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:23,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 07:44:23,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:23,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:23,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 07:44:23,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:24,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:24,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773781732] [2021-11-07 07:44:24,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:24,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40994798] [2021-11-07 07:44:24,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40994798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:24,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:24,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-07 07:44:24,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557409507] [2021-11-07 07:44:24,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:44:24,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:44:24,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:44:24,153 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 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) [2021-11-07 07:44:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:24,426 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-11-07 07:44:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 07:44:24,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 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 [2021-11-07 07:44:24,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:24,428 INFO L225 Difference]: With dead ends: 72 [2021-11-07 07:44:24,428 INFO L226 Difference]: Without dead ends: 68 [2021-11-07 07:44:24,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:44:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-07 07:44:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-07 07:44:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:24,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-11-07 07:44:24,435 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2021-11-07 07:44:24,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:24,436 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-11-07 07:44:24,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 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) [2021-11-07 07:44:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-11-07 07:44:24,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:44:24,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:24,437 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:24,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:24,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:24,663 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:24,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1750010028, now seen corresponding path program 14 times [2021-11-07 07:44:24,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:24,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206645464] [2021-11-07 07:44:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:24,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:24,684 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:24,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119059142] [2021-11-07 07:44:24,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:24,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:24,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:24,685 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:24,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 07:44:26,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:26,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:26,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 07:44:26,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:26,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:26,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206645464] [2021-11-07 07:44:26,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:26,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119059142] [2021-11-07 07:44:26,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119059142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:26,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:26,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-07 07:44:26,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469677033] [2021-11-07 07:44:26,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:44:26,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:26,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:44:26,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:44:26,761 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:27,204 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-11-07 07:44:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:44:27,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-07 07:44:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:27,206 INFO L225 Difference]: With dead ends: 74 [2021-11-07 07:44:27,206 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 07:44:27,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:44:27,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 07:44:27,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-07 07:44:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 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) [2021-11-07 07:44:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-11-07 07:44:27,214 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2021-11-07 07:44:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:27,214 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-11-07 07:44:27,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:27,215 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-11-07 07:44:27,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 07:44:27,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:27,216 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:27,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:27,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:27,419 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:27,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1833168025, now seen corresponding path program 15 times [2021-11-07 07:44:27,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:27,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992802521] [2021-11-07 07:44:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:27,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:27,444 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:27,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145346821] [2021-11-07 07:44:27,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:27,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:27,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:27,445 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:27,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 07:44:28,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-07 07:44:28,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:28,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:44:28,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:28,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:28,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992802521] [2021-11-07 07:44:28,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:28,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145346821] [2021-11-07 07:44:28,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145346821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:28,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:28,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-07 07:44:28,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092584539] [2021-11-07 07:44:28,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:44:28,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:28,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:44:28,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:44:28,892 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 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) [2021-11-07 07:44:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:29,084 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-11-07 07:44:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:44:29,085 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 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 [2021-11-07 07:44:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:29,085 INFO L225 Difference]: With dead ends: 76 [2021-11-07 07:44:29,086 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 07:44:29,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:44:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 07:44:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-07 07:44:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 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) [2021-11-07 07:44:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-11-07 07:44:29,092 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2021-11-07 07:44:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:29,093 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-11-07 07:44:29,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 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) [2021-11-07 07:44:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-11-07 07:44:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 07:44:29,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:29,094 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:29,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-07 07:44:29,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 07:44:29,302 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:29,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:29,302 INFO L85 PathProgramCache]: Analyzing trace with hash -691052928, now seen corresponding path program 15 times [2021-11-07 07:44:29,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:29,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629506198] [2021-11-07 07:44:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:29,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:29,322 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:29,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135173064] [2021-11-07 07:44:29,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:29,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:29,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:29,323 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:29,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 07:44:30,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-07 07:44:30,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:30,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-07 07:44:30,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:31,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:31,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629506198] [2021-11-07 07:44:31,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:31,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135173064] [2021-11-07 07:44:31,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135173064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:31,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:31,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-07 07:44:31,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789456114] [2021-11-07 07:44:31,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:44:31,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:31,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:44:31,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:44:31,210 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:31,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:31,758 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2021-11-07 07:44:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:44:31,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-07 07:44:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:31,759 INFO L225 Difference]: With dead ends: 78 [2021-11-07 07:44:31,759 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 07:44:31,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:44:31,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 07:44:31,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-07 07:44:31,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 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) [2021-11-07 07:44:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-11-07 07:44:31,765 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2021-11-07 07:44:31,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:31,766 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-11-07 07:44:31,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:31,766 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-11-07 07:44:31,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 07:44:31,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:31,766 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:31,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:31,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:31,975 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:31,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1652442171, now seen corresponding path program 16 times [2021-11-07 07:44:31,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:31,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663203907] [2021-11-07 07:44:31,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:31,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:31,983 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:31,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54208520] [2021-11-07 07:44:31,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:44:31,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:31,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:31,985 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:31,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 07:44:32,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:44:32,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:32,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 07:44:32,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:32,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:32,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663203907] [2021-11-07 07:44:32,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:32,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54208520] [2021-11-07 07:44:32,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54208520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:32,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:32,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-07 07:44:32,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439578288] [2021-11-07 07:44:32,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:44:32,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:32,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:44:32,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:44:32,955 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2021-11-07 07:44:33,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:33,165 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-11-07 07:44:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:44:33,166 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 [2021-11-07 07:44:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:33,166 INFO L225 Difference]: With dead ends: 80 [2021-11-07 07:44:33,167 INFO L226 Difference]: Without dead ends: 76 [2021-11-07 07:44:33,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:44:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-07 07:44:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-07 07:44:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-11-07 07:44:33,172 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2021-11-07 07:44:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:33,172 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-11-07 07:44:33,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2021-11-07 07:44:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-11-07 07:44:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 07:44:33,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:33,173 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:33,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-07 07:44:33,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-07 07:44:33,374 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:33,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1094145452, now seen corresponding path program 16 times [2021-11-07 07:44:33,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:33,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425803499] [2021-11-07 07:44:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:33,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:33,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:33,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146443170] [2021-11-07 07:44:33,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:44:33,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:33,398 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:33,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 07:44:34,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:44:34,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:34,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-07 07:44:34,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:35,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:35,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425803499] [2021-11-07 07:44:35,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:35,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146443170] [2021-11-07 07:44:35,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146443170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:35,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:35,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-07 07:44:35,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114683187] [2021-11-07 07:44:35,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:44:35,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:35,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:44:35,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:44:35,607 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 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) [2021-11-07 07:44:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:36,110 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-11-07 07:44:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:44:36,112 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 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 [2021-11-07 07:44:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:36,113 INFO L225 Difference]: With dead ends: 82 [2021-11-07 07:44:36,113 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 07:44:36,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:44:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 07:44:36,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-07 07:44:36,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-11-07 07:44:36,119 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2021-11-07 07:44:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:36,120 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-11-07 07:44:36,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 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) [2021-11-07 07:44:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-11-07 07:44:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 07:44:36,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:36,120 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:36,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:36,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 07:44:36,329 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:36,329 INFO L85 PathProgramCache]: Analyzing trace with hash 827583247, now seen corresponding path program 17 times [2021-11-07 07:44:36,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:36,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251619503] [2021-11-07 07:44:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:36,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:36,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:36,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503538262] [2021-11-07 07:44:36,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:44:36,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:36,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:36,344 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:36,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 07:44:37,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 07:44:37,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:44:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:37,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:37,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251619503] [2021-11-07 07:44:37,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:37,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503538262] [2021-11-07 07:44:37,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503538262] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:37,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:37,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-07 07:44:37,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91376221] [2021-11-07 07:44:37,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:44:37,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:44:37,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:44:37,853 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 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) [2021-11-07 07:44:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:38,073 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-11-07 07:44:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 07:44:38,073 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 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 [2021-11-07 07:44:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:38,074 INFO L225 Difference]: With dead ends: 84 [2021-11-07 07:44:38,074 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 07:44:38,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:44:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 07:44:38,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-07 07:44:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-11-07 07:44:38,080 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2021-11-07 07:44:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:38,080 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-11-07 07:44:38,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 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) [2021-11-07 07:44:38,080 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-11-07 07:44:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 07:44:38,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:38,081 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:38,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-07 07:44:38,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:38,290 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:38,290 INFO L85 PathProgramCache]: Analyzing trace with hash 785378344, now seen corresponding path program 17 times [2021-11-07 07:44:38,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:38,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468355041] [2021-11-07 07:44:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:38,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:38,307 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:38,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790145761] [2021-11-07 07:44:38,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:44:38,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:38,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:38,312 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:38,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 07:44:39,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 07:44:39,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:39,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-07 07:44:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:40,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:40,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468355041] [2021-11-07 07:44:40,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:40,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790145761] [2021-11-07 07:44:40,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790145761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:40,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:40,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-07 07:44:40,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902243620] [2021-11-07 07:44:40,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:44:40,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:44:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:44:40,574 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:41,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:41,100 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-11-07 07:44:41,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:44:41,101 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-07 07:44:41,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:41,101 INFO L225 Difference]: With dead ends: 86 [2021-11-07 07:44:41,102 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 07:44:41,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:44:41,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 07:44:41,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-07 07:44:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-11-07 07:44:41,109 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2021-11-07 07:44:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:41,110 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-11-07 07:44:41,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-11-07 07:44:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 07:44:41,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:41,111 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:41,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:41,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:41,320 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:41,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1131280413, now seen corresponding path program 18 times [2021-11-07 07:44:41,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:41,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773970264] [2021-11-07 07:44:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:41,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:41,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:41,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14575137] [2021-11-07 07:44:41,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:44:41,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:41,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:41,332 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:41,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 07:44:42,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 07:44:42,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:42,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 07:44:42,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:43,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:43,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773970264] [2021-11-07 07:44:43,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:43,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14575137] [2021-11-07 07:44:43,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14575137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:43,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:43,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-07 07:44:43,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907497254] [2021-11-07 07:44:43,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:44:43,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:43,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:44:43,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:44:43,215 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:43,466 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-11-07 07:44:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 07:44:43,466 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-07 07:44:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:43,467 INFO L225 Difference]: With dead ends: 88 [2021-11-07 07:44:43,467 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 07:44:43,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:44:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 07:44:43,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-07 07:44:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-11-07 07:44:43,475 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2021-11-07 07:44:43,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:43,476 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-11-07 07:44:43,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-11-07 07:44:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 07:44:43,477 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:43,477 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:43,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:43,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 07:44:43,683 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:43,683 INFO L85 PathProgramCache]: Analyzing trace with hash -486923268, now seen corresponding path program 18 times [2021-11-07 07:44:43,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:43,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065787595] [2021-11-07 07:44:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:43,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:43,692 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:43,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100612910] [2021-11-07 07:44:43,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:44:43,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:43,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:43,693 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:43,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 07:44:47,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 07:44:47,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:47,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-07 07:44:47,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:48,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:48,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065787595] [2021-11-07 07:44:48,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:48,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100612910] [2021-11-07 07:44:48,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100612910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:48,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:48,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-07 07:44:48,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097545289] [2021-11-07 07:44:48,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:44:48,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:48,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:44:48,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:44:48,159 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:48,732 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-11-07 07:44:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:44:48,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-07 07:44:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:48,733 INFO L225 Difference]: With dead ends: 90 [2021-11-07 07:44:48,733 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 07:44:48,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:44:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 07:44:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-07 07:44:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 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) [2021-11-07 07:44:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-11-07 07:44:48,739 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2021-11-07 07:44:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:48,740 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-11-07 07:44:48,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-11-07 07:44:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 07:44:48,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:48,741 INFO L513 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:48,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:48,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:48,943 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:48,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:48,943 INFO L85 PathProgramCache]: Analyzing trace with hash 252549815, now seen corresponding path program 19 times [2021-11-07 07:44:48,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:48,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542832167] [2021-11-07 07:44:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:48,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:48,956 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:48,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870588097] [2021-11-07 07:44:48,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:48,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:48,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:48,957 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:48,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 07:44:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:49,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 07:44:49,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:50,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:50,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542832167] [2021-11-07 07:44:50,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:50,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870588097] [2021-11-07 07:44:50,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870588097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:50,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:50,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-07 07:44:50,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69402434] [2021-11-07 07:44:50,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:44:50,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:50,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:44:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:44:50,284 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:50,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:50,611 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-11-07 07:44:50,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 07:44:50,612 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-07 07:44:50,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:50,613 INFO L225 Difference]: With dead ends: 92 [2021-11-07 07:44:50,613 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 07:44:50,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:44:50,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 07:44:50,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-07 07:44:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-11-07 07:44:50,621 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2021-11-07 07:44:50,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:50,621 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-11-07 07:44:50,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-11-07 07:44:50,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 07:44:50,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:50,622 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:50,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:50,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:50,823 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:50,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2065935920, now seen corresponding path program 19 times [2021-11-07 07:44:50,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:50,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31966025] [2021-11-07 07:44:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:50,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:50,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:50,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365723349] [2021-11-07 07:44:50,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:44:50,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:50,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:50,851 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:50,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 07:44:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:44:52,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-07 07:44:52,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:52,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:52,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31966025] [2021-11-07 07:44:52,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:52,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365723349] [2021-11-07 07:44:52,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365723349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:52,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:52,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-07 07:44:52,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203152969] [2021-11-07 07:44:52,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:44:52,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:44:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:44:52,996 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:53,709 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-11-07 07:44:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:44:53,710 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 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 [2021-11-07 07:44:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:53,711 INFO L225 Difference]: With dead ends: 94 [2021-11-07 07:44:53,711 INFO L226 Difference]: Without dead ends: 90 [2021-11-07 07:44:53,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:44:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-07 07:44:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-07 07:44:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 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) [2021-11-07 07:44:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-11-07 07:44:53,718 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 85 [2021-11-07 07:44:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:53,719 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-11-07 07:44:53,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-11-07 07:44:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 07:44:53,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:53,720 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:53,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-07 07:44:53,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-07 07:44:53,927 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:53,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:53,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1055153269, now seen corresponding path program 20 times [2021-11-07 07:44:53,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:53,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620319402] [2021-11-07 07:44:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:53,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:53,938 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:53,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733111310] [2021-11-07 07:44:53,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:53,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:53,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:53,948 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:53,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 07:44:54,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:54,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:54,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 07:44:54,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:55,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:55,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620319402] [2021-11-07 07:44:55,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:55,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733111310] [2021-11-07 07:44:55,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733111310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:55,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:55,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-07 07:44:55,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358245338] [2021-11-07 07:44:55,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:44:55,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:44:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:44:55,403 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 24 states, 24 states have (on average 3.625) 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) [2021-11-07 07:44:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:55,682 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2021-11-07 07:44:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 07:44:55,683 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) 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 [2021-11-07 07:44:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:55,683 INFO L225 Difference]: With dead ends: 96 [2021-11-07 07:44:55,684 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 07:44:55,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:44:55,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 07:44:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-07 07:44:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 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) [2021-11-07 07:44:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-11-07 07:44:55,691 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2021-11-07 07:44:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:55,691 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-11-07 07:44:55,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) 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) [2021-11-07 07:44:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-11-07 07:44:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 07:44:55,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:55,692 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:55,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 07:44:55,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:55,895 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:55,895 INFO L85 PathProgramCache]: Analyzing trace with hash -343181916, now seen corresponding path program 20 times [2021-11-07 07:44:55,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:55,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606024399] [2021-11-07 07:44:55,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:55,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:55,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:55,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656135719] [2021-11-07 07:44:55,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:44:55,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:55,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:55,910 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:55,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 07:44:57,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:44:57,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:44:57,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-07 07:44:57,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:44:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:58,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:44:58,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606024399] [2021-11-07 07:44:58,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:44:58,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656135719] [2021-11-07 07:44:58,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656135719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:58,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:44:58,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-07 07:44:58,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401185685] [2021-11-07 07:44:58,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 07:44:58,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:58,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 07:44:58,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:44:58,798 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 25 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:44:59,436 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-11-07 07:44:59,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:44:59,437 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-07 07:44:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:44:59,437 INFO L225 Difference]: With dead ends: 98 [2021-11-07 07:44:59,438 INFO L226 Difference]: Without dead ends: 94 [2021-11-07 07:44:59,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:44:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-07 07:44:59,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-07 07:44:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-11-07 07:44:59,446 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2021-11-07 07:44:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:44:59,447 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-11-07 07:44:59,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.56) internal successors, (89), 25 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:44:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-11-07 07:44:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 07:44:59,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:44:59,448 INFO L513 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2021-11-07 07:44:59,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-07 07:44:59,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:59,651 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:44:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:44:59,651 INFO L85 PathProgramCache]: Analyzing trace with hash 949035615, now seen corresponding path program 21 times [2021-11-07 07:44:59,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:44:59,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382042614] [2021-11-07 07:44:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:44:59,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:44:59,670 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:44:59,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752691212] [2021-11-07 07:44:59,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:44:59,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:44:59,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:44:59,672 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:44:59,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 07:45:03,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-07 07:45:03,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:03,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 07:45:03,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:03,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:03,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382042614] [2021-11-07 07:45:03,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:45:03,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752691212] [2021-11-07 07:45:03,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752691212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:03,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:45:03,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-07 07:45:03,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495418355] [2021-11-07 07:45:03,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 07:45:03,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:03,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 07:45:03,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:45:03,835 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 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) [2021-11-07 07:45:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:04,130 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-11-07 07:45:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 07:45:04,130 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 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) Word has length 91 [2021-11-07 07:45:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:04,131 INFO L225 Difference]: With dead ends: 100 [2021-11-07 07:45:04,131 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 07:45:04,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:45:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 07:45:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-07 07:45:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 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) [2021-11-07 07:45:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-11-07 07:45:04,137 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 91 [2021-11-07 07:45:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:04,137 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-11-07 07:45:04,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 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) [2021-11-07 07:45:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-11-07 07:45:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 07:45:04,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:04,138 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:04,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:04,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 07:45:04,339 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:04,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1536987000, now seen corresponding path program 21 times [2021-11-07 07:45:04,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:04,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701251657] [2021-11-07 07:45:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:04,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:04,358 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:45:04,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826545830] [2021-11-07 07:45:04,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:45:04,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:04,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:04,360 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:04,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 07:45:06,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-07 07:45:06,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:06,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-07 07:45:06,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:08,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:08,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701251657] [2021-11-07 07:45:08,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:45:08,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826545830] [2021-11-07 07:45:08,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826545830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:08,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:45:08,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-07 07:45:08,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621869282] [2021-11-07 07:45:08,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 07:45:08,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:08,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 07:45:08,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:45:08,042 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 26 states, 26 states have (on average 3.576923076923077) internal successors, (93), 26 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) [2021-11-07 07:45:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:08,787 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-11-07 07:45:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:45:08,788 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.576923076923077) internal successors, (93), 26 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 [2021-11-07 07:45:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:08,788 INFO L225 Difference]: With dead ends: 102 [2021-11-07 07:45:08,788 INFO L226 Difference]: Without dead ends: 98 [2021-11-07 07:45:08,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=697, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:45:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-07 07:45:08,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-07 07:45:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2021-11-07 07:45:08,795 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 93 [2021-11-07 07:45:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:08,796 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2021-11-07 07:45:08,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.576923076923077) internal successors, (93), 26 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) [2021-11-07 07:45:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2021-11-07 07:45:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 07:45:08,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:08,797 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:08,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-07 07:45:08,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:08,999 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:08,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:08,999 INFO L85 PathProgramCache]: Analyzing trace with hash -389867725, now seen corresponding path program 22 times [2021-11-07 07:45:08,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:08,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582097090] [2021-11-07 07:45:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:09,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:09,011 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:45:09,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700438588] [2021-11-07 07:45:09,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:45:09,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:09,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:09,014 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:09,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 07:45:10,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:45:10,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:10,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 07:45:10,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:10,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:10,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582097090] [2021-11-07 07:45:10,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:45:10,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700438588] [2021-11-07 07:45:10,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700438588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:10,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:45:10,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-07 07:45:10,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713182839] [2021-11-07 07:45:10,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 07:45:10,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:10,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 07:45:10,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:45:10,674 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 25 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:10,989 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-11-07 07:45:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 07:45:10,990 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 25 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-11-07 07:45:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:10,991 INFO L225 Difference]: With dead ends: 104 [2021-11-07 07:45:10,991 INFO L226 Difference]: Without dead ends: 100 [2021-11-07 07:45:10,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:45:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-07 07:45:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-11-07 07:45:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-11-07 07:45:11,001 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2021-11-07 07:45:11,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:11,001 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-11-07 07:45:11,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 25 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-11-07 07:45:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 07:45:11,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:11,002 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:11,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:11,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 07:45:11,213 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:11,214 INFO L85 PathProgramCache]: Analyzing trace with hash -953901236, now seen corresponding path program 22 times [2021-11-07 07:45:11,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:11,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135307773] [2021-11-07 07:45:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:11,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:11,241 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:45:11,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55574918] [2021-11-07 07:45:11,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:45:11,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:11,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:11,244 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:11,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 07:45:14,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:45:14,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:14,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-07 07:45:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 1012 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:14,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:14,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135307773] [2021-11-07 07:45:14,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:45:14,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55574918] [2021-11-07 07:45:14,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55574918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:14,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:45:14,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-07 07:45:14,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004974422] [2021-11-07 07:45:14,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:45:14,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:14,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:45:14,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:45:14,877 INFO L87 Difference]: Start difference. First operand 100 states and 101 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) [2021-11-07 07:45:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:15,769 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2021-11-07 07:45:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:45:15,770 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 [2021-11-07 07:45:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:15,771 INFO L225 Difference]: With dead ends: 109 [2021-11-07 07:45:15,771 INFO L226 Difference]: Without dead ends: 105 [2021-11-07 07:45:15,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=804, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:45:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-07 07:45:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2021-11-07 07:45:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:15,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-11-07 07:45:15,780 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 97 [2021-11-07 07:45:15,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:15,780 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-11-07 07:45:15,780 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) [2021-11-07 07:45:15,780 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-11-07 07:45:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 07:45:15,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:15,781 INFO L513 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:15,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-07 07:45:15,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 07:45:15,991 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:15,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1836678649, now seen corresponding path program 23 times [2021-11-07 07:45:15,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:15,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939384438] [2021-11-07 07:45:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:15,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:16,003 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:45:16,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346906714] [2021-11-07 07:45:16,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:45:16,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:16,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:16,004 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:16,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 07:45:19,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-07 07:45:19,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:19,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 07:45:19,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:20,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:20,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939384438] [2021-11-07 07:45:20,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:45:20,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346906714] [2021-11-07 07:45:20,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346906714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:20,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:45:20,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-07 07:45:20,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112382232] [2021-11-07 07:45:20,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 07:45:20,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:20,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 07:45:20,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:45:20,389 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:20,776 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2021-11-07 07:45:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 07:45:20,777 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-07 07:45:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:20,778 INFO L225 Difference]: With dead ends: 108 [2021-11-07 07:45:20,778 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 07:45:20,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:45:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 07:45:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-07 07:45:20,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-11-07 07:45:20,787 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2021-11-07 07:45:20,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:20,787 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-11-07 07:45:20,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-11-07 07:45:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 07:45:20,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:20,788 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:20,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:21,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:21,003 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:21,004 INFO L85 PathProgramCache]: Analyzing trace with hash 230204704, now seen corresponding path program 23 times [2021-11-07 07:45:21,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:21,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335363218] [2021-11-07 07:45:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:21,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:21,016 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:45:21,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311535854] [2021-11-07 07:45:21,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:45:21,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:21,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:21,017 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:21,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 07:45:26,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-07 07:45:26,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:26,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-07 07:45:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 1104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:27,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:27,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335363218] [2021-11-07 07:45:27,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:45:27,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311535854] [2021-11-07 07:45:27,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311535854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:27,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:45:27,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-07 07:45:27,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938739732] [2021-11-07 07:45:27,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 07:45:27,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 07:45:27,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2021-11-07 07:45:27,497 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 29 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:28,379 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-11-07 07:45:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:45:28,379 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 29 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-07 07:45:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:28,380 INFO L225 Difference]: With dead ends: 113 [2021-11-07 07:45:28,380 INFO L226 Difference]: Without dead ends: 109 [2021-11-07 07:45:28,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:45:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-07 07:45:28,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-11-07 07:45:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-11-07 07:45:28,386 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2021-11-07 07:45:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:28,387 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-11-07 07:45:28,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 29 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-11-07 07:45:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 07:45:28,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:28,388 INFO L513 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:28,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:28,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 07:45:28,588 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:28,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2077203749, now seen corresponding path program 24 times [2021-11-07 07:45:28,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:28,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408452111] [2021-11-07 07:45:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:28,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:28,601 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:45:28,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107499091] [2021-11-07 07:45:28,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:45:28,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:28,605 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:28,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 07:45:30,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-07 07:45:30,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:30,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-07 07:45:30,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:31,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:31,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408452111] [2021-11-07 07:45:31,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 07:45:31,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107499091] [2021-11-07 07:45:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107499091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:31,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:45:31,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-07 07:45:31,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599467464] [2021-11-07 07:45:31,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:45:31,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:45:31,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:45:31,313 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 27 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:31,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:31,672 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-11-07 07:45:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 07:45:31,673 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 27 states have internal predecessors, (103), 0 states have call successors, (0), 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 [2021-11-07 07:45:31,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:31,674 INFO L225 Difference]: With dead ends: 112 [2021-11-07 07:45:31,674 INFO L226 Difference]: Without dead ends: 108 [2021-11-07 07:45:31,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:45:31,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-07 07:45:31,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-11-07 07:45:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-11-07 07:45:31,691 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2021-11-07 07:45:31,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:31,691 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-11-07 07:45:31,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 27 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-11-07 07:45:31,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 07:45:31,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:31,693 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:31,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:31,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:31,906 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:31,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:31,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1013817588, now seen corresponding path program 24 times [2021-11-07 07:45:31,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:31,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305670040] [2021-11-07 07:45:31,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:31,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:31,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 07:45:31,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208177420] [2021-11-07 07:45:31,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:45:31,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:31,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:31,932 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:31,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00330d33-d2a3-4d20-8e70-1c3c2d8278b8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process