./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/vogal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/vogal-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc --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 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:30:43,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:30:43,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:30:43,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:30:43,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:30:43,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:30:43,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:30:43,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:30:43,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:30:43,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:30:43,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:30:43,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:30:43,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:30:43,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:30:43,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:30:43,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:30:43,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:30:43,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:30:43,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:30:43,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:30:43,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:30:43,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:30:43,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:30:43,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:30:43,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:30:43,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:30:43,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:30:43,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:30:43,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:30:43,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:30:43,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:30:43,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:30:43,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:30:43,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:30:43,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:30:43,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:30:43,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:30:43,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:30:43,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:30:43,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:30:43,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:30:43,725 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:30:43,769 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:30:43,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:30:43,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:30:43,776 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:30:43,777 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:30:43,777 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:30:43,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:30:43,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:30:43,779 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:30:43,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:30:43,780 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:30:43,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:30:43,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:30:43,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:30:43,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:30:43,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:30:43,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:30:43,801 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:30:43,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:30:43,801 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:30:43,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:30:43,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:30:43,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:30:43,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:30:43,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:30:43,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:30:43,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:30:43,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:30:43,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:30:43,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:30:43,807 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:30:43,808 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:30:43,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:30:43,808 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_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0004a4c1c8347096eaba7e87038be30bb20b14d3b5abd082e79b4b4e835a243e [2022-11-02 20:30:44,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:30:44,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:30:44,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:30:44,163 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:30:44,167 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:30:44,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loops/vogal-1.i [2022-11-02 20:30:44,278 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/data/479445877/60bac01eb4a64f5cb4339f2319b88eeb/FLAG128fae987 [2022-11-02 20:30:44,828 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:30:44,829 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/sv-benchmarks/c/loops/vogal-1.i [2022-11-02 20:30:44,838 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/data/479445877/60bac01eb4a64f5cb4339f2319b88eeb/FLAG128fae987 [2022-11-02 20:30:45,197 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/data/479445877/60bac01eb4a64f5cb4339f2319b88eeb [2022-11-02 20:30:45,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:30:45,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:30:45,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:30:45,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:30:45,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:30:45,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188ccbc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45, skipping insertion in model container [2022-11-02 20:30:45,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:30:45,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:30:45,533 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/sv-benchmarks/c/loops/vogal-1.i[895,908] [2022-11-02 20:30:45,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:30:45,609 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:30:45,629 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/sv-benchmarks/c/loops/vogal-1.i[895,908] [2022-11-02 20:30:45,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:30:45,680 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:30:45,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45 WrapperNode [2022-11-02 20:30:45,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:30:45,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:30:45,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:30:45,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:30:45,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,735 INFO L138 Inliner]: procedures = 17, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 133 [2022-11-02 20:30:45,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:30:45,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:30:45,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:30:45,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:30:45,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,764 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:30:45,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:30:45,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:30:45,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:30:45,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (1/1) ... [2022-11-02 20:30:45,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:30:45,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:45,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:30:45,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:30:45,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:30:45,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:30:45,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:30:45,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:30:45,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:30:45,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:30:45,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:30:45,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:30:45,942 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:30:45,943 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:30:46,137 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:30:46,144 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:30:46,144 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-02 20:30:46,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:30:46 BoogieIcfgContainer [2022-11-02 20:30:46,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:30:46,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:30:46,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:30:46,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:30:46,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:30:45" (1/3) ... [2022-11-02 20:30:46,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241ac31e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:30:46, skipping insertion in model container [2022-11-02 20:30:46,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:45" (2/3) ... [2022-11-02 20:30:46,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@241ac31e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:30:46, skipping insertion in model container [2022-11-02 20:30:46,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:30:46" (3/3) ... [2022-11-02 20:30:46,161 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-11-02 20:30:46,184 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:30:46,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:30:46,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:30:46,262 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@94b4a92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:30:46,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:30:46,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:46,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:30:46,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:46,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:46,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash 388073842, now seen corresponding path program 1 times [2022-11-02 20:30:46,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:46,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86932421] [2022-11-02 20:30:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:46,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:46,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:46,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86932421] [2022-11-02 20:30:46,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86932421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:46,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:46,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:30:46,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704118147] [2022-11-02 20:30:46,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:46,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:30:46,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:46,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:30:46,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:30:46,544 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2022-11-02 20:30:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:46,571 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2022-11-02 20:30:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:30:46,575 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 [2022-11-02 20:30:46,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:46,584 INFO L225 Difference]: With dead ends: 54 [2022-11-02 20:30:46,584 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 20:30:46,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:30:46,595 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:46,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:30:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 20:30:46,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-02 20:30:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2022-11-02 20:30:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-02 20:30:46,645 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2022-11-02 20:30:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:46,646 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-02 20:30:46,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2022-11-02 20:30:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-02 20:30:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:30:46,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:46,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:46,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:30:46,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2016618829, now seen corresponding path program 1 times [2022-11-02 20:30:46,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:46,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477408710] [2022-11-02 20:30:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:46,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:47,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:47,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477408710] [2022-11-02 20:30:47,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477408710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:47,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:47,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:30:47,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517098565] [2022-11-02 20:30:47,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:47,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:30:47,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:47,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:30:47,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:30:47,048 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:47,151 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-11-02 20:30:47,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:30:47,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-02 20:30:47,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:47,153 INFO L225 Difference]: With dead ends: 64 [2022-11-02 20:30:47,153 INFO L226 Difference]: Without dead ends: 43 [2022-11-02 20:30:47,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:30:47,155 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:47,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:30:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-02 20:30:47,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2022-11-02 20:30:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 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) [2022-11-02 20:30:47,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-11-02 20:30:47,163 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2022-11-02 20:30:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:47,163 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-11-02 20:30:47,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-11-02 20:30:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:30:47,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:47,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:47,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:30:47,165 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:47,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:47,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2094228111, now seen corresponding path program 1 times [2022-11-02 20:30:47,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:47,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146350850] [2022-11-02 20:30:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:47,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:30:47,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:47,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146350850] [2022-11-02 20:30:47,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146350850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:47,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860712879] [2022-11-02 20:30:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:47,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:47,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:47,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:47,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:30:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:47,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:30:47,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:30:47,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:30:47,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860712879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:47,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:30:47,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2022-11-02 20:30:47,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318568413] [2022-11-02 20:30:47,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:47,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:30:47,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:47,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:30:47,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:30:47,783 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:47,877 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-11-02 20:30:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:30:47,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:30:47,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:47,879 INFO L225 Difference]: With dead ends: 52 [2022-11-02 20:30:47,880 INFO L226 Difference]: Without dead ends: 48 [2022-11-02 20:30:47,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:30:47,882 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:47,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 124 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:30:47,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-02 20:30:47,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-11-02 20:30:47,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:47,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2022-11-02 20:30:47,891 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2022-11-02 20:30:47,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:47,892 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2022-11-02 20:30:47,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:47,892 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2022-11-02 20:30:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:30:47,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:47,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:47,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:48,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:48,109 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:48,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:48,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2138024952, now seen corresponding path program 1 times [2022-11-02 20:30:48,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:48,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157181631] [2022-11-02 20:30:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:48,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:30:48,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:48,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157181631] [2022-11-02 20:30:48,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157181631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:48,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884155550] [2022-11-02 20:30:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:48,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:48,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:48,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:48,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:30:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:48,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:30:48,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:30:48,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:30:48,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884155550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:48,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:30:48,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-02 20:30:48,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397456754] [2022-11-02 20:30:48,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:48,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:30:48,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:48,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:30:48,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:30:48,446 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:48,541 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-11-02 20:30:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:30:48,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-02 20:30:48,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:48,548 INFO L225 Difference]: With dead ends: 97 [2022-11-02 20:30:48,548 INFO L226 Difference]: Without dead ends: 69 [2022-11-02 20:30:48,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:30:48,554 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:48,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 73 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:30:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-02 20:30:48,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2022-11-02 20:30:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 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) [2022-11-02 20:30:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-11-02 20:30:48,568 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 23 [2022-11-02 20:30:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:48,569 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-11-02 20:30:48,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-11-02 20:30:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:30:48,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:48,576 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:48,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:48,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:48,792 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:48,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:48,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1093571635, now seen corresponding path program 1 times [2022-11-02 20:30:48,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:48,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571306536] [2022-11-02 20:30:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:48,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:30:48,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571306536] [2022-11-02 20:30:48,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571306536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372848874] [2022-11-02 20:30:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:48,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:48,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:48,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:49,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:30:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:49,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:30:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:49,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:30:49,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:30:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:30:49,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:30:49,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372848874] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:49,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:30:49,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2022-11-02 20:30:49,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601917918] [2022-11-02 20:30:49,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:49,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:30:49,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:49,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:30:49,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:30:49,633 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:49,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:49,886 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2022-11-02 20:30:49,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:30:49,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-02 20:30:49,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:49,890 INFO L225 Difference]: With dead ends: 61 [2022-11-02 20:30:49,890 INFO L226 Difference]: Without dead ends: 40 [2022-11-02 20:30:49,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:30:49,891 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:49,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:30:49,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-02 20:30:49,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-02 20:30:49,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-11-02 20:30:49,906 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 24 [2022-11-02 20:30:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:49,908 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-11-02 20:30:49,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-11-02 20:30:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:30:49,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:49,910 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:49,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-02 20:30:50,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:50,129 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1875229501, now seen corresponding path program 1 times [2022-11-02 20:30:50,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:50,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098793028] [2022-11-02 20:30:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:50,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:30:50,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:50,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098793028] [2022-11-02 20:30:50,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098793028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:50,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257458234] [2022-11-02 20:30:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:50,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:50,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:50,268 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:50,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:30:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:50,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:30:50,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:50,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:30:50,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-02 20:30:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:30:50,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:30:50,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257458234] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:50,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:30:50,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2022-11-02 20:30:50,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130581053] [2022-11-02 20:30:50,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:50,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:30:50,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:50,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:30:50,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:30:50,768 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2022-11-02 20:30:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:51,003 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-11-02 20:30:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:30:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 [2022-11-02 20:30:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:51,005 INFO L225 Difference]: With dead ends: 66 [2022-11-02 20:30:51,005 INFO L226 Difference]: Without dead ends: 62 [2022-11-02 20:30:51,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:30:51,006 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:51,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 65 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:30:51,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-02 20:30:51,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2022-11-02 20:30:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-11-02 20:30:51,016 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 25 [2022-11-02 20:30:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:51,016 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-11-02 20:30:51,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2022-11-02 20:30:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-11-02 20:30:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:30:51,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:51,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:51,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:51,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:51,243 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:51,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:51,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1536847246, now seen corresponding path program 1 times [2022-11-02 20:30:51,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:51,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101802836] [2022-11-02 20:30:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:51,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:30:51,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:51,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101802836] [2022-11-02 20:30:51,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101802836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:51,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913650636] [2022-11-02 20:30:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:51,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:51,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:51,377 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:51,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:30:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:51,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:30:51,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:30:51,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:30:51,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913650636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:51,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:51,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2022-11-02 20:30:51,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023158583] [2022-11-02 20:30:51,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:51,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:30:51,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:51,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:30:51,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:30:51,567 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:51,888 INFO L93 Difference]: Finished difference Result 220 states and 289 transitions. [2022-11-02 20:30:51,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:30:51,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-02 20:30:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:51,890 INFO L225 Difference]: With dead ends: 220 [2022-11-02 20:30:51,891 INFO L226 Difference]: Without dead ends: 183 [2022-11-02 20:30:51,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:30:51,892 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 228 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:51,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 169 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:30:51,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-02 20:30:51,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 48. [2022-11-02 20:30:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 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) [2022-11-02 20:30:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-11-02 20:30:51,907 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 26 [2022-11-02 20:30:51,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:51,907 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-11-02 20:30:51,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-11-02 20:30:51,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:30:51,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:51,908 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:51,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:52,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:52,135 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:52,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:52,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1845688875, now seen corresponding path program 2 times [2022-11-02 20:30:52,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:52,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378752805] [2022-11-02 20:30:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:52,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:30:52,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:52,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378752805] [2022-11-02 20:30:52,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378752805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:52,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61176646] [2022-11-02 20:30:52,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:30:52,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:52,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:52,264 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:52,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:30:52,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:30:52,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:30:52,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:30:52,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:30:52,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:30:52,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61176646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:52,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:52,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 10 [2022-11-02 20:30:52,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696747240] [2022-11-02 20:30:52,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:52,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:30:52,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:52,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:30:52,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:30:52,523 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:53,602 INFO L93 Difference]: Finished difference Result 390 states and 517 transitions. [2022-11-02 20:30:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:30:53,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-02 20:30:53,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:53,605 INFO L225 Difference]: With dead ends: 390 [2022-11-02 20:30:53,605 INFO L226 Difference]: Without dead ends: 349 [2022-11-02 20:30:53,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:30:53,607 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 634 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:53,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 277 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:30:53,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-02 20:30:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 52. [2022-11-02 20:30:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:53,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-11-02 20:30:53,625 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 30 [2022-11-02 20:30:53,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:53,625 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-11-02 20:30:53,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:53,626 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-11-02 20:30:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 20:30:53,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:53,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:53,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:53,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:53,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash -926448804, now seen corresponding path program 1 times [2022-11-02 20:30:53,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:53,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320543533] [2022-11-02 20:30:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:53,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:30:54,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320543533] [2022-11-02 20:30:54,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320543533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:54,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761969709] [2022-11-02 20:30:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:54,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:54,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:54,027 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:54,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:30:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:54,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:30:54,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:30:54,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:30:54,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761969709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:54,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:30:54,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-02 20:30:54,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274051056] [2022-11-02 20:30:54,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:54,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:30:54,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:54,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:30:54,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:30:54,145 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2022-11-02 20:30:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:54,185 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2022-11-02 20:30:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:30:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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 33 [2022-11-02 20:30:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:54,187 INFO L225 Difference]: With dead ends: 94 [2022-11-02 20:30:54,187 INFO L226 Difference]: Without dead ends: 64 [2022-11-02 20:30:54,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:30:54,191 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:54,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:30:54,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-02 20:30:54,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-11-02 20:30:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-11-02 20:30:54,213 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 33 [2022-11-02 20:30:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:54,213 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-11-02 20:30:54,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2022-11-02 20:30:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-11-02 20:30:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 20:30:54,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:54,221 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:54,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:54,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:54,435 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:54,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1399324024, now seen corresponding path program 3 times [2022-11-02 20:30:54,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:54,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539763183] [2022-11-02 20:30:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:54,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:30:54,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:54,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539763183] [2022-11-02 20:30:54,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539763183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:54,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042469369] [2022-11-02 20:30:54,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:30:54,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:54,625 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:54,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:30:54,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:30:54,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:30:54,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:30:54,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:54,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:30:55,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:30:55,135 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:30:55,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-02 20:30:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:30:55,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:55,442 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-02 20:30:55,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2022-11-02 20:30:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 20:30:55,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042469369] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:55,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:30:55,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 10] total 19 [2022-11-02 20:30:55,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744624583] [2022-11-02 20:30:55,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:55,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:30:55,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:55,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:30:55,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:30:55,446 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:55,630 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-11-02 20:30:55,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:30:55,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-02 20:30:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:55,632 INFO L225 Difference]: With dead ends: 90 [2022-11-02 20:30:55,632 INFO L226 Difference]: Without dead ends: 69 [2022-11-02 20:30:55,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:30:55,633 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:55,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 79 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:30:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-02 20:30:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-11-02 20:30:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 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) [2022-11-02 20:30:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-11-02 20:30:55,678 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 34 [2022-11-02 20:30:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:55,679 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-11-02 20:30:55,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:30:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-11-02 20:30:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:30:55,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:55,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:55,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:55,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:30:55,903 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:55,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:55,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1076823445, now seen corresponding path program 1 times [2022-11-02 20:30:55,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:55,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207349126] [2022-11-02 20:30:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:55,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:30:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:56,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207349126] [2022-11-02 20:30:56,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207349126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:56,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747995916] [2022-11-02 20:30:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:56,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:56,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:56,071 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:56,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:30:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:56,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:30:56,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:30:56,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:30:56,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747995916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:56,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:56,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 15 [2022-11-02 20:30:56,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175189387] [2022-11-02 20:30:56,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:56,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:30:56,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:56,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:30:56,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:30:56,447 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 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) [2022-11-02 20:30:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:57,820 INFO L93 Difference]: Finished difference Result 432 states and 552 transitions. [2022-11-02 20:30:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-02 20:30:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 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 36 [2022-11-02 20:30:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:57,828 INFO L225 Difference]: With dead ends: 432 [2022-11-02 20:30:57,828 INFO L226 Difference]: Without dead ends: 382 [2022-11-02 20:30:57,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 20:30:57,833 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 459 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:57,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 926 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:30:57,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-02 20:30:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 69. [2022-11-02 20:30:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 68 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) [2022-11-02 20:30:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2022-11-02 20:30:57,879 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 36 [2022-11-02 20:30:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:57,884 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2022-11-02 20:30:57,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 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) [2022-11-02 20:30:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2022-11-02 20:30:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 20:30:57,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:57,889 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:57,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:58,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:30:58,091 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:58,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:58,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1408390255, now seen corresponding path program 1 times [2022-11-02 20:30:58,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:58,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426474899] [2022-11-02 20:30:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:58,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:30:58,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:58,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426474899] [2022-11-02 20:30:58,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426474899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:58,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56980749] [2022-11-02 20:30:58,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:58,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:58,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:58,295 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:58,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:30:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:58,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:30:58,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:58,773 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:30:58,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-02 20:30:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:30:58,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:59,176 INFO L356 Elim1Store]: treesize reduction 4, result has 96.6 percent of original size [2022-11-02 20:30:59,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 139 [2022-11-02 20:30:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:30:59,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56980749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:59,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:30:59,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 21 [2022-11-02 20:30:59,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449450614] [2022-11-02 20:30:59,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:59,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:30:59,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:59,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:30:59,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:30:59,733 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:01,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:01,872 INFO L93 Difference]: Finished difference Result 549 states and 725 transitions. [2022-11-02 20:31:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:31:01,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-02 20:31:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:01,875 INFO L225 Difference]: With dead ends: 549 [2022-11-02 20:31:01,876 INFO L226 Difference]: Without dead ends: 491 [2022-11-02 20:31:01,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:31:01,878 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 610 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:01,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 562 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:31:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-11-02 20:31:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 95. [2022-11-02 20:31:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 94 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2022-11-02 20:31:01,917 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 38 [2022-11-02 20:31:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:01,918 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2022-11-02 20:31:01,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2022-11-02 20:31:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:31:01,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:01,919 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:01,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:02,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:31:02,143 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:02,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:02,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1678328275, now seen corresponding path program 1 times [2022-11-02 20:31:02,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:02,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788100209] [2022-11-02 20:31:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:02,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:31:02,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:02,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788100209] [2022-11-02 20:31:02,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788100209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:02,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388993462] [2022-11-02 20:31:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:02,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:02,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:02,327 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:02,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:31:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:02,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:31:02,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:02,783 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:31:02,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-11-02 20:31:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 20:31:02,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:03,135 INFO L356 Elim1Store]: treesize reduction 11, result has 90.7 percent of original size [2022-11-02 20:31:03,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 136 [2022-11-02 20:31:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:31:03,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388993462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:03,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:03,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 9] total 18 [2022-11-02 20:31:03,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789847835] [2022-11-02 20:31:03,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:03,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:31:03,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:31:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:31:03,726 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 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) [2022-11-02 20:31:04,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:04,670 INFO L93 Difference]: Finished difference Result 313 states and 431 transitions. [2022-11-02 20:31:04,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:31:04,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 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 40 [2022-11-02 20:31:04,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:04,672 INFO L225 Difference]: With dead ends: 313 [2022-11-02 20:31:04,673 INFO L226 Difference]: Without dead ends: 241 [2022-11-02 20:31:04,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:31:04,674 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 213 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:04,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 274 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:31:04,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-02 20:31:04,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 127. [2022-11-02 20:31:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2698412698412698) internal successors, (160), 126 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions. [2022-11-02 20:31:04,724 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 40 [2022-11-02 20:31:04,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:04,724 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions. [2022-11-02 20:31:04,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 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) [2022-11-02 20:31:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions. [2022-11-02 20:31:04,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:31:04,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:04,726 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:04,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:04,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:04,939 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:04,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1208431142, now seen corresponding path program 2 times [2022-11-02 20:31:04,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:04,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959507940] [2022-11-02 20:31:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:04,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:31:05,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:05,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959507940] [2022-11-02 20:31:05,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959507940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:05,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377489944] [2022-11-02 20:31:05,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:31:05,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:05,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:05,538 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:05,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:31:05,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:31:05,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:31:05,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-02 20:31:05,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:31:05,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:31:06,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377489944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:06,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:06,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 20 [2022-11-02 20:31:06,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7614042] [2022-11-02 20:31:06,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:06,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:31:06,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:06,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:31:06,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:31:06,128 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:07,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:07,810 INFO L93 Difference]: Finished difference Result 537 states and 691 transitions. [2022-11-02 20:31:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:31:07,811 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-02 20:31:07,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:07,814 INFO L225 Difference]: With dead ends: 537 [2022-11-02 20:31:07,815 INFO L226 Difference]: Without dead ends: 531 [2022-11-02 20:31:07,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:31:07,816 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 503 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:07,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1147 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:31:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-11-02 20:31:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 165. [2022-11-02 20:31:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2804878048780488) internal successors, (210), 164 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 210 transitions. [2022-11-02 20:31:07,900 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 210 transitions. Word has length 46 [2022-11-02 20:31:07,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:07,900 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 210 transitions. [2022-11-02 20:31:07,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 210 transitions. [2022-11-02 20:31:07,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:31:07,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:07,901 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:07,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:08,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:08,117 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:08,117 INFO L85 PathProgramCache]: Analyzing trace with hash -528372772, now seen corresponding path program 1 times [2022-11-02 20:31:08,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:08,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987634434] [2022-11-02 20:31:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:08,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 20:31:09,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987634434] [2022-11-02 20:31:09,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987634434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:09,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468526260] [2022-11-02 20:31:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:09,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:09,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:09,771 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:09,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:31:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:09,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:31:09,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:13,817 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:31:13,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2022-11-02 20:31:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:31:15,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:17,360 INFO L356 Elim1Store]: treesize reduction 378, result has 0.3 percent of original size [2022-11-02 20:31:17,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 1 [2022-11-02 20:31:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:31:17,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468526260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:17,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:17,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 13] total 31 [2022-11-02 20:31:17,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153131409] [2022-11-02 20:31:17,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:17,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:31:17,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:17,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:31:17,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:31:17,368 INFO L87 Difference]: Start difference. First operand 165 states and 210 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 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) [2022-11-02 20:31:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:20,285 INFO L93 Difference]: Finished difference Result 311 states and 402 transitions. [2022-11-02 20:31:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:31:20,286 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 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 46 [2022-11-02 20:31:20,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:20,287 INFO L225 Difference]: With dead ends: 311 [2022-11-02 20:31:20,287 INFO L226 Difference]: Without dead ends: 249 [2022-11-02 20:31:20,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 20:31:20,289 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:20,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 250 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 369 Invalid, 0 Unknown, 272 Unchecked, 0.5s Time] [2022-11-02 20:31:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-02 20:31:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 240. [2022-11-02 20:31:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.288702928870293) internal successors, (308), 239 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 308 transitions. [2022-11-02 20:31:20,402 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 308 transitions. Word has length 46 [2022-11-02 20:31:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:20,403 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 308 transitions. [2022-11-02 20:31:20,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 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) [2022-11-02 20:31:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 308 transitions. [2022-11-02 20:31:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:31:20,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:20,404 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:20,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:20,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:31:20,625 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:20,625 INFO L85 PathProgramCache]: Analyzing trace with hash -785729316, now seen corresponding path program 1 times [2022-11-02 20:31:20,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:20,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091604356] [2022-11-02 20:31:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:20,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:31:21,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:21,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091604356] [2022-11-02 20:31:21,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091604356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:21,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47516654] [2022-11-02 20:31:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:21,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:21,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:21,905 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:21,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:31:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:22,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:31:22,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:30,052 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:31:30,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-11-02 20:31:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:31:36,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:38,165 INFO L356 Elim1Store]: treesize reduction 378, result has 0.3 percent of original size [2022-11-02 20:31:38,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 1 [2022-11-02 20:31:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:31:38,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47516654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:38,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:38,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 13] total 31 [2022-11-02 20:31:38,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068429617] [2022-11-02 20:31:38,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:38,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:31:38,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:31:38,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:31:38,172 INFO L87 Difference]: Start difference. First operand 240 states and 308 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 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) [2022-11-02 20:31:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:38,949 INFO L93 Difference]: Finished difference Result 348 states and 443 transitions. [2022-11-02 20:31:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:31:38,949 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 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 46 [2022-11-02 20:31:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:38,951 INFO L225 Difference]: With dead ends: 348 [2022-11-02 20:31:38,951 INFO L226 Difference]: Without dead ends: 313 [2022-11-02 20:31:38,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:31:38,953 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 126 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:38,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 143 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 136 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-11-02 20:31:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-02 20:31:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 242. [2022-11-02 20:31:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.2821576763485478) internal successors, (309), 241 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 309 transitions. [2022-11-02 20:31:39,045 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 309 transitions. Word has length 46 [2022-11-02 20:31:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:39,046 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 309 transitions. [2022-11-02 20:31:39,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 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) [2022-11-02 20:31:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 309 transitions. [2022-11-02 20:31:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:31:39,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:39,047 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:39,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:39,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:31:39,250 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:39,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:39,250 INFO L85 PathProgramCache]: Analyzing trace with hash -404220840, now seen corresponding path program 1 times [2022-11-02 20:31:39,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:39,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626463858] [2022-11-02 20:31:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:39,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:31:41,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:41,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626463858] [2022-11-02 20:31:41,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626463858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:41,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491941195] [2022-11-02 20:31:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:41,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:41,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:41,419 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:41,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:31:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 20:31:41,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:41,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:31:41,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:31:41,983 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:31:41,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-11-02 20:31:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:31:41,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:45,084 INFO L356 Elim1Store]: treesize reduction 26, result has 68.3 percent of original size [2022-11-02 20:31:45,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 63 [2022-11-02 20:31:45,169 INFO L356 Elim1Store]: treesize reduction 25, result has 72.5 percent of original size [2022-11-02 20:31:45,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 73 [2022-11-02 20:31:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:31:45,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491941195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:45,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:45,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 27 [2022-11-02 20:31:45,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614510682] [2022-11-02 20:31:45,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:45,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:31:45,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:45,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:31:45,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:31:45,326 INFO L87 Difference]: Start difference. First operand 242 states and 309 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 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) [2022-11-02 20:31:46,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:46,714 INFO L93 Difference]: Finished difference Result 696 states and 904 transitions. [2022-11-02 20:31:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:31:46,714 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 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 46 [2022-11-02 20:31:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:46,718 INFO L225 Difference]: With dead ends: 696 [2022-11-02 20:31:46,718 INFO L226 Difference]: Without dead ends: 428 [2022-11-02 20:31:46,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:31:46,720 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 117 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:46,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 323 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 440 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2022-11-02 20:31:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-11-02 20:31:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 307. [2022-11-02 20:31:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.2777777777777777) internal successors, (391), 306 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 391 transitions. [2022-11-02 20:31:46,883 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 391 transitions. Word has length 46 [2022-11-02 20:31:46,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:46,884 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 391 transitions. [2022-11-02 20:31:46,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 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) [2022-11-02 20:31:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 391 transitions. [2022-11-02 20:31:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:31:46,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:46,885 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:46,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:47,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:31:47,086 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash -661577384, now seen corresponding path program 1 times [2022-11-02 20:31:47,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:47,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465045085] [2022-11-02 20:31:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:47,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:31:49,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:49,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465045085] [2022-11-02 20:31:49,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465045085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:49,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824999188] [2022-11-02 20:31:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:49,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:49,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:49,250 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:49,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:31:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:49,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 20:31:49,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:49,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:31:49,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:31:49,823 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:31:49,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2022-11-02 20:31:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:31:49,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:51,364 INFO L356 Elim1Store]: treesize reduction 17, result has 81.3 percent of original size [2022-11-02 20:31:51,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-11-02 20:31:51,525 INFO L356 Elim1Store]: treesize reduction 17, result has 79.3 percent of original size [2022-11-02 20:31:51,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 72 [2022-11-02 20:31:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:31:51,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824999188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:51,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:51,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-11-02 20:31:51,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069660967] [2022-11-02 20:31:51,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:51,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:31:51,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:31:51,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:31:51,677 INFO L87 Difference]: Start difference. First operand 307 states and 391 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:53,231 INFO L93 Difference]: Finished difference Result 513 states and 653 transitions. [2022-11-02 20:31:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:31:53,232 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-02 20:31:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:53,233 INFO L225 Difference]: With dead ends: 513 [2022-11-02 20:31:53,234 INFO L226 Difference]: Without dead ends: 410 [2022-11-02 20:31:53,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=359, Invalid=1047, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:31:53,235 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 165 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:53,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 244 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 366 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2022-11-02 20:31:53,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-11-02 20:31:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 268. [2022-11-02 20:31:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.2546816479400749) internal successors, (335), 267 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 335 transitions. [2022-11-02 20:31:53,361 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 335 transitions. Word has length 46 [2022-11-02 20:31:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:53,362 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 335 transitions. [2022-11-02 20:31:53,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:53,362 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 335 transitions. [2022-11-02 20:31:53,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-02 20:31:53,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:53,363 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:53,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:53,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:31:53,571 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:53,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:53,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1978872450, now seen corresponding path program 1 times [2022-11-02 20:31:53,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:53,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803919932] [2022-11-02 20:31:53,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:53,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-02 20:31:53,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:53,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803919932] [2022-11-02 20:31:53,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803919932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:53,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722369118] [2022-11-02 20:31:53,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:53,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:53,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:53,807 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:53,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:31:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:53,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:31:53,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:31:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 20:31:53,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:31:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-02 20:31:54,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722369118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:31:54,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:31:54,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-11-02 20:31:54,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302441832] [2022-11-02 20:31:54,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:31:54,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:31:54,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:31:54,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:31:54,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:31:54,086 INFO L87 Difference]: Start difference. First operand 268 states and 335 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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) [2022-11-02 20:31:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:31:54,502 INFO L93 Difference]: Finished difference Result 646 states and 806 transitions. [2022-11-02 20:31:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:31:54,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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 55 [2022-11-02 20:31:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:31:54,505 INFO L225 Difference]: With dead ends: 646 [2022-11-02 20:31:54,505 INFO L226 Difference]: Without dead ends: 413 [2022-11-02 20:31:54,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:31:54,506 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 197 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:31:54,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 179 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:31:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-11-02 20:31:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 292. [2022-11-02 20:31:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.2439862542955327) internal successors, (362), 291 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:31:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 362 transitions. [2022-11-02 20:31:54,674 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 362 transitions. Word has length 55 [2022-11-02 20:31:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:31:54,675 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 362 transitions. [2022-11-02 20:31:54,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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) [2022-11-02 20:31:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 362 transitions. [2022-11-02 20:31:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:31:54,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:31:54,676 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:31:54,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:31:54,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:54,890 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:31:54,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:31:54,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1403496468, now seen corresponding path program 2 times [2022-11-02 20:31:54,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:31:54,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214715164] [2022-11-02 20:31:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:31:54,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:31:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:31:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-02 20:31:55,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:31:55,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214715164] [2022-11-02 20:31:55,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214715164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:31:55,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830637543] [2022-11-02 20:31:55,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:31:55,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:31:55,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:31:55,896 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:31:55,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:31:55,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:31:55,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:31:55,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:31:55,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:02,481 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:32:02,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-11-02 20:32:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:32:10,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:12,501 INFO L356 Elim1Store]: treesize reduction 378, result has 0.3 percent of original size [2022-11-02 20:32:12,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 1 [2022-11-02 20:32:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 20:32:12,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830637543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:32:12,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:32:12,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 35 [2022-11-02 20:32:12,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042885001] [2022-11-02 20:32:12,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:12,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:32:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:32:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:32:12,506 INFO L87 Difference]: Start difference. First operand 292 states and 362 transitions. Second operand has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:21,724 INFO L93 Difference]: Finished difference Result 681 states and 850 transitions. [2022-11-02 20:32:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-02 20:32:21,724 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 0 states have call successors, (0), 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 56 [2022-11-02 20:32:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:21,726 INFO L225 Difference]: With dead ends: 681 [2022-11-02 20:32:21,726 INFO L226 Difference]: Without dead ends: 598 [2022-11-02 20:32:21,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=1032, Invalid=6278, Unknown=0, NotChecked=0, Total=7310 [2022-11-02 20:32:21,728 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 109 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:21,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 264 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 302 Invalid, 0 Unknown, 345 Unchecked, 0.3s Time] [2022-11-02 20:32:21,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-02 20:32:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 463. [2022-11-02 20:32:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.2662337662337662) internal successors, (585), 462 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 585 transitions. [2022-11-02 20:32:21,926 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 585 transitions. Word has length 56 [2022-11-02 20:32:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:21,926 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 585 transitions. [2022-11-02 20:32:21,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 585 transitions. [2022-11-02 20:32:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-02 20:32:21,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:21,928 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:21,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:22,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:22,147 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:22,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:22,147 INFO L85 PathProgramCache]: Analyzing trace with hash -41484349, now seen corresponding path program 3 times [2022-11-02 20:32:22,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:22,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067498872] [2022-11-02 20:32:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:22,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 20:32:25,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:25,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067498872] [2022-11-02 20:32:25,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067498872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:32:25,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651461945] [2022-11-02 20:32:25,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:32:25,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:25,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:25,441 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:25,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:32:25,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:32:25,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:32:25,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:32:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:25,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-02 20:32:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-02 20:32:25,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:26,140 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-02 20:32:26,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-11-02 20:32:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-02 20:32:26,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651461945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:32:26,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:32:26,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 9] total 33 [2022-11-02 20:32:26,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254485287] [2022-11-02 20:32:26,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:26,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:32:26,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:26,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:32:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:32:26,205 INFO L87 Difference]: Start difference. First operand 463 states and 585 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 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) [2022-11-02 20:32:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:29,304 INFO L93 Difference]: Finished difference Result 1431 states and 1850 transitions. [2022-11-02 20:32:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-02 20:32:29,305 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 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 57 [2022-11-02 20:32:29,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:29,309 INFO L225 Difference]: With dead ends: 1431 [2022-11-02 20:32:29,310 INFO L226 Difference]: Without dead ends: 1427 [2022-11-02 20:32:29,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=579, Invalid=2727, Unknown=0, NotChecked=0, Total=3306 [2022-11-02 20:32:29,313 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 609 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:29,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 321 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:32:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-11-02 20:32:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 481. [2022-11-02 20:32:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.25625) internal successors, (603), 480 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 603 transitions. [2022-11-02 20:32:29,620 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 603 transitions. Word has length 57 [2022-11-02 20:32:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:29,621 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 603 transitions. [2022-11-02 20:32:29,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 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) [2022-11-02 20:32:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 603 transitions. [2022-11-02 20:32:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 20:32:29,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:29,623 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:29,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:29,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-02 20:32:29,851 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:29,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash -793949111, now seen corresponding path program 4 times [2022-11-02 20:32:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:29,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839213771] [2022-11-02 20:32:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:29,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-02 20:32:30,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839213771] [2022-11-02 20:32:30,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839213771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:32:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338665346] [2022-11-02 20:32:30,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:32:30,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:30,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:30,095 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:30,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:32:30,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:32:30,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:32:30,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:32:30,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-02 20:32:30,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-02 20:32:30,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338665346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:32:30,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:32:30,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 11] total 23 [2022-11-02 20:32:30,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019583445] [2022-11-02 20:32:30,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:30,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:32:30,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:32:30,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:32:30,613 INFO L87 Difference]: Start difference. First operand 481 states and 603 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:40,574 INFO L93 Difference]: Finished difference Result 4679 states and 6242 transitions. [2022-11-02 20:32:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-02 20:32:40,578 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-02 20:32:40,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:40,589 INFO L225 Difference]: With dead ends: 4679 [2022-11-02 20:32:40,589 INFO L226 Difference]: Without dead ends: 4235 [2022-11-02 20:32:40,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4131 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1811, Invalid=9109, Unknown=0, NotChecked=0, Total=10920 [2022-11-02 20:32:40,594 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1233 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:40,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 703 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:32:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2022-11-02 20:32:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 1169. [2022-11-02 20:32:41,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 1.268835616438356) internal successors, (1482), 1168 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:41,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1482 transitions. [2022-11-02 20:32:41,370 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1482 transitions. Word has length 58 [2022-11-02 20:32:41,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:41,371 INFO L495 AbstractCegarLoop]: Abstraction has 1169 states and 1482 transitions. [2022-11-02 20:32:41,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:32:41,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1482 transitions. [2022-11-02 20:32:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:32:41,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:41,374 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:41,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:41,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:41,599 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:41,599 INFO L85 PathProgramCache]: Analyzing trace with hash 168090165, now seen corresponding path program 5 times [2022-11-02 20:32:41,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:41,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199238475] [2022-11-02 20:32:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:41,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-02 20:32:42,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:32:42,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199238475] [2022-11-02 20:32:42,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199238475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:32:42,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847381105] [2022-11-02 20:32:42,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:32:42,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:32:42,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:42,035 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:32:42,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:32:44,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-02 20:32:44,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:32:44,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-02 20:32:44,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:44,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2022-11-02 20:32:44,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-02 20:32:46,129 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-02 20:32:46,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 11 [2022-11-02 20:32:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 20:32:46,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 24 proven. 35 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 20:32:48,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847381105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:32:48,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:32:48,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 15] total 40 [2022-11-02 20:32:48,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407900101] [2022-11-02 20:32:48,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:48,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-02 20:32:48,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:32:48,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-02 20:32:48,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1355, Unknown=2, NotChecked=0, Total=1560 [2022-11-02 20:32:48,503 INFO L87 Difference]: Start difference. First operand 1169 states and 1482 transitions. Second operand has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:09,550 INFO L93 Difference]: Finished difference Result 4199 states and 5665 transitions. [2022-11-02 20:33:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-02 20:33:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 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 66 [2022-11-02 20:33:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:09,562 INFO L225 Difference]: With dead ends: 4199 [2022-11-02 20:33:09,563 INFO L226 Difference]: Without dead ends: 4120 [2022-11-02 20:33:09,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 116 SyntacticMatches, 16 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6000 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=1715, Invalid=15575, Unknown=2, NotChecked=0, Total=17292 [2022-11-02 20:33:09,568 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 685 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 3480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 508 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:09,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 2262 Invalid, 3480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2796 Invalid, 0 Unknown, 508 Unchecked, 2.5s Time] [2022-11-02 20:33:09,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2022-11-02 20:33:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 1379. [2022-11-02 20:33:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 1.2917271407837445) internal successors, (1780), 1378 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1780 transitions. [2022-11-02 20:33:10,675 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1780 transitions. Word has length 66 [2022-11-02 20:33:10,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:10,676 INFO L495 AbstractCegarLoop]: Abstraction has 1379 states and 1780 transitions. [2022-11-02 20:33:10,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.15) internal successors, (126), 40 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1780 transitions. [2022-11-02 20:33:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:33:10,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:10,679 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:10,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:10,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:10,886 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:10,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1786130607, now seen corresponding path program 6 times [2022-11-02 20:33:10,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:10,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502398551] [2022-11-02 20:33:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:10,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 20:33:13,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:13,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502398551] [2022-11-02 20:33:13,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502398551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:13,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157388287] [2022-11-02 20:33:13,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:33:13,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:13,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:13,598 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:13,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:33:13,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-02 20:33:13,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:13,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 20:33:13,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:13,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:33:13,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:33:13,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:33:13,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:33:13,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:33:13,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:33:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-02 20:33:14,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-02 20:33:17,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157388287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:17,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:17,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 43 [2022-11-02 20:33:17,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866284773] [2022-11-02 20:33:17,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:17,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-02 20:33:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-02 20:33:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:33:17,986 INFO L87 Difference]: Start difference. First operand 1379 states and 1780 transitions. Second operand has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:23,297 INFO L93 Difference]: Finished difference Result 3824 states and 5012 transitions. [2022-11-02 20:33:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-02 20:33:23,297 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 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 [2022-11-02 20:33:23,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:23,303 INFO L225 Difference]: With dead ends: 3824 [2022-11-02 20:33:23,303 INFO L226 Difference]: Without dead ends: 3171 [2022-11-02 20:33:23,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=886, Invalid=4664, Unknown=0, NotChecked=0, Total=5550 [2022-11-02 20:33:23,306 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 447 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 752 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:23,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 736 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 660 Invalid, 0 Unknown, 752 Unchecked, 0.7s Time] [2022-11-02 20:33:23,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2022-11-02 20:33:25,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2522. [2022-11-02 20:33:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 1.2963109877032923) internal successors, (3268), 2521 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 3268 transitions. [2022-11-02 20:33:25,249 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 3268 transitions. Word has length 67 [2022-11-02 20:33:25,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:25,250 INFO L495 AbstractCegarLoop]: Abstraction has 2522 states and 3268 transitions. [2022-11-02 20:33:25,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.2790697674418605) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:25,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 3268 transitions. [2022-11-02 20:33:25,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:33:25,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:25,255 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:25,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:25,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:33:25,467 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1374970291, now seen corresponding path program 7 times [2022-11-02 20:33:25,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:25,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622170446] [2022-11-02 20:33:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:25,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-02 20:33:26,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622170446] [2022-11-02 20:33:26,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622170446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311144327] [2022-11-02 20:33:26,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:33:26,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:26,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:26,655 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:26,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:33:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:26,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 20:33:26,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:31,048 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:33:31,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 253 [2022-11-02 20:33:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-02 20:33:32,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:40,921 INFO L356 Elim1Store]: treesize reduction 378, result has 0.3 percent of original size [2022-11-02 20:33:40,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 223 treesize of output 1 [2022-11-02 20:33:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-02 20:33:40,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311144327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:40,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:33:40,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 13] total 31 [2022-11-02 20:33:40,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136339385] [2022-11-02 20:33:40,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:40,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:33:40,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:33:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:33:40,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:33:40,930 INFO L87 Difference]: Start difference. First operand 2522 states and 3268 transitions. Second operand has 31 states, 31 states have (on average 4.096774193548387) internal successors, (127), 31 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:53,181 INFO L93 Difference]: Finished difference Result 4721 states and 6237 transitions. [2022-11-02 20:33:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-02 20:33:53,182 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.096774193548387) internal successors, (127), 31 states have internal predecessors, (127), 0 states have call successors, (0), 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 [2022-11-02 20:33:53,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:53,190 INFO L225 Difference]: With dead ends: 4721 [2022-11-02 20:33:53,190 INFO L226 Difference]: Without dead ends: 4401 [2022-11-02 20:33:53,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=1711, Invalid=7409, Unknown=0, NotChecked=0, Total=9120 [2022-11-02 20:33:53,192 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 267 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 628 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:53,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 216 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 251 Invalid, 0 Unknown, 628 Unchecked, 0.4s Time] [2022-11-02 20:33:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2022-11-02 20:33:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 1571. [2022-11-02 20:33:54,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 1.2796178343949045) internal successors, (2009), 1570 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2009 transitions. [2022-11-02 20:33:54,493 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2009 transitions. Word has length 67 [2022-11-02 20:33:54,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:54,493 INFO L495 AbstractCegarLoop]: Abstraction has 1571 states and 2009 transitions. [2022-11-02 20:33:54,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.096774193548387) internal successors, (127), 31 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:33:54,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2009 transitions. [2022-11-02 20:33:54,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:33:54,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:54,497 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:54,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-02 20:33:54,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 20:33:54,711 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:54,711 INFO L85 PathProgramCache]: Analyzing trace with hash -436746483, now seen corresponding path program 8 times [2022-11-02 20:33:54,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:33:54,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826099604] [2022-11-02 20:33:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:54,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:33:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-02 20:33:58,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:33:58,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826099604] [2022-11-02 20:33:58,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826099604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:33:58,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089694857] [2022-11-02 20:33:58,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:33:58,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:33:58,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:33:58,310 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:33:58,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:33:58,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:33:58,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:33:58,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 20:33:58,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:59,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:33:59,271 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-11-02 20:33:59,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-11-02 20:33:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 64 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 20:33:59,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:04,021 INFO L356 Elim1Store]: treesize reduction 26, result has 68.3 percent of original size [2022-11-02 20:34:04,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 63 [2022-11-02 20:34:04,116 INFO L356 Elim1Store]: treesize reduction 25, result has 72.5 percent of original size [2022-11-02 20:34:04,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 73 [2022-11-02 20:34:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-02 20:34:04,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089694857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:04,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:34:04,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 44 [2022-11-02 20:34:04,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748941417] [2022-11-02 20:34:04,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:04,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 20:34:04,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:34:04,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 20:34:04,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1640, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:34:04,458 INFO L87 Difference]: Start difference. First operand 1571 states and 2009 transitions. Second operand has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:34:16,809 INFO L93 Difference]: Finished difference Result 4016 states and 5134 transitions. [2022-11-02 20:34:16,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-02 20:34:16,810 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 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 [2022-11-02 20:34:16,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:34:16,817 INFO L225 Difference]: With dead ends: 4016 [2022-11-02 20:34:16,817 INFO L226 Difference]: Without dead ends: 2428 [2022-11-02 20:34:16,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 118 SyntacticMatches, 27 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3756 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1321, Invalid=8381, Unknown=0, NotChecked=0, Total=9702 [2022-11-02 20:34:16,820 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 634 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:34:16,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 903 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1685 Invalid, 0 Unknown, 202 Unchecked, 1.8s Time] [2022-11-02 20:34:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2022-11-02 20:34:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1411. [2022-11-02 20:34:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1410 states have (on average 1.222695035460993) internal successors, (1724), 1410 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1724 transitions. [2022-11-02 20:34:18,102 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1724 transitions. Word has length 67 [2022-11-02 20:34:18,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:34:18,102 INFO L495 AbstractCegarLoop]: Abstraction has 1411 states and 1724 transitions. [2022-11-02 20:34:18,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:34:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1724 transitions. [2022-11-02 20:34:18,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:34:18,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:34:18,108 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:34:18,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:34:18,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:34:18,328 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:34:18,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:34:18,328 INFO L85 PathProgramCache]: Analyzing trace with hash 6687953, now seen corresponding path program 9 times [2022-11-02 20:34:18,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:34:18,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596957875] [2022-11-02 20:34:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:34:18,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:34:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:34:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 20:34:21,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:34:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596957875] [2022-11-02 20:34:21,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596957875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:34:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834975601] [2022-11-02 20:34:21,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:34:21,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:34:21,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:34:21,596 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:34:21,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20bd260-b69c-4b88-910e-c71d9f8ea6a3/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 20:34:21,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 20:34:21,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:34:21,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-02 20:34:21,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:21,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:34:21,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:34:21,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:34:21,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:34:21,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:34:22,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2022-11-02 20:34:22,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11