./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d108e1b312e23292c2ea345a286561a785c584326c1bb9f78386216f268bcb59 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:23:28,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:23:28,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:23:28,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:23:28,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:23:28,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:23:28,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:23:28,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:23:28,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:23:28,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:23:28,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:23:28,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:23:28,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:23:28,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:23:28,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:23:28,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:23:28,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:23:28,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:23:28,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:23:28,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:23:28,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:23:28,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:23:28,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:23:28,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:23:28,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:23:28,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:23:28,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:23:28,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:23:28,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:23:28,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:23:28,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:23:28,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:23:28,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:23:28,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:23:28,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:23:28,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:23:28,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:23:28,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:23:28,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:23:28,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:23:28,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:23:28,805 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:23:28,833 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:23:28,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:23:28,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:23:28,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:23:28,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:23:28,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:23:28,845 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:23:28,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:23:28,845 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:23:28,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:23:28,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:23:28,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:23:28,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:23:28,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:23:28,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:23:28,848 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:23:28,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:23:28,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:23:28,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:23:28,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:23:28,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:23:28,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:23:28,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:23:28,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:23:28,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:23:28,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:23:28,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:23:28,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:23:28,851 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:23:28,852 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:23:28,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:23:28,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:23:28,853 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_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d108e1b312e23292c2ea345a286561a785c584326c1bb9f78386216f268bcb59 [2021-11-07 07:23:29,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:23:29,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:23:29,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:23:29,158 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:23:29,159 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:23:29,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-11-07 07:23:29,230 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/data/ada3fca91/d2fb95f1f024496a8091175969a2921b/FLAG30157dac7 [2021-11-07 07:23:30,097 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:23:30,099 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-11-07 07:23:30,143 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/data/ada3fca91/d2fb95f1f024496a8091175969a2921b/FLAG30157dac7 [2021-11-07 07:23:30,587 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/data/ada3fca91/d2fb95f1f024496a8091175969a2921b [2021-11-07 07:23:30,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:23:30,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:23:30,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:23:30,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:23:30,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:23:30,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:23:30" (1/1) ... [2021-11-07 07:23:30,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b3955e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:30, skipping insertion in model container [2021-11-07 07:23:30,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:23:30" (1/1) ... [2021-11-07 07:23:30,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:23:30,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:23:31,208 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[6582,6595] [2021-11-07 07:23:31,294 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[11894,11907] [2021-11-07 07:23:32,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:23:32,557 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:23:32,588 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[6582,6595] [2021-11-07 07:23:32,605 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/sv-benchmarks/c/combinations/pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c[11894,11907] [2021-11-07 07:23:33,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:23:33,246 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:23:33,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:33 WrapperNode [2021-11-07 07:23:33,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:23:33,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:23:33,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:23:33,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:23:33,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:33" (1/1) ... [2021-11-07 07:23:33,320 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:33" (1/1) ... [2021-11-07 07:23:33,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:23:33,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:23:33,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:23:33,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:23:33,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:33" (1/1) ... [2021-11-07 07:23:33,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:33" (1/1) ... [2021-11-07 07:23:33,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:33" (1/1) ... [2021-11-07 07:23:33,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:33" (1/1) ... [2021-11-07 07:23:34,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:33" (1/1) ... [2021-11-07 07:23:34,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:33" (1/1) ... [2021-11-07 07:23:34,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:33" (1/1) ... [2021-11-07 07:23:34,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:23:34,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:23:34,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:23:34,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:23:34,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:33" (1/1) ... [2021-11-07 07:23:34,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:23:34,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:23:34,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:23:34,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:23:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:23:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:23:34,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:23:34,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:23:39,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:23:39,006 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2021-11-07 07:23:39,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:23:39 BoogieIcfgContainer [2021-11-07 07:23:39,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:23:39,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:23:39,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:23:39,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:23:39,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:23:30" (1/3) ... [2021-11-07 07:23:39,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ade4962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:23:39, skipping insertion in model container [2021-11-07 07:23:39,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:23:33" (2/3) ... [2021-11-07 07:23:39,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ade4962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:23:39, skipping insertion in model container [2021-11-07 07:23:39,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:23:39" (3/3) ... [2021-11-07 07:23:39,020 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals+Problem12_label01.c [2021-11-07 07:23:39,026 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:23:39,026 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 07:23:39,094 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:23:39,104 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:23:39,104 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 07:23:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 877 states, 874 states have (on average 1.9050343249427917) internal successors, (1665), 876 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:23:39,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:39,158 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:39,159 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:39,174 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2021-11-07 07:23:39,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:39,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297470195] [2021-11-07 07:23:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:39,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:39,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:39,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297470195] [2021-11-07 07:23:39,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297470195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:39,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:39,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:23:39,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57336525] [2021-11-07 07:23:39,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:23:39,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:39,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:23:39,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:23:39,408 INFO L87 Difference]: Start difference. First operand has 877 states, 874 states have (on average 1.9050343249427917) internal successors, (1665), 876 states have internal predecessors, (1665), 0 states have call successors, (0), 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 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:39,484 INFO L93 Difference]: Finished difference Result 1730 states and 3288 transitions. [2021-11-07 07:23:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:23:39,485 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 07:23:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:39,508 INFO L225 Difference]: With dead ends: 1730 [2021-11-07 07:23:39,508 INFO L226 Difference]: Without dead ends: 811 [2021-11-07 07:23:39,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:23:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-11-07 07:23:39,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2021-11-07 07:23:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 809 states have (on average 1.8936959208899877) internal successors, (1532), 810 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1532 transitions. [2021-11-07 07:23:39,631 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1532 transitions. Word has length 26 [2021-11-07 07:23:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:39,632 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1532 transitions. [2021-11-07 07:23:39,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1532 transitions. [2021-11-07 07:23:39,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:23:39,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:39,634 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:39,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:23:39,635 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:39,638 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-11-07 07:23:39,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:39,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36326237] [2021-11-07 07:23:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:39,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:39,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:39,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36326237] [2021-11-07 07:23:39,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36326237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:39,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:39,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:23:39,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203487848] [2021-11-07 07:23:39,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:23:39,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:39,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:23:39,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:23:39,804 INFO L87 Difference]: Start difference. First operand 811 states and 1532 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:39,909 INFO L93 Difference]: Finished difference Result 850 states and 1591 transitions. [2021-11-07 07:23:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:23:39,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 07:23:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:39,917 INFO L225 Difference]: With dead ends: 850 [2021-11-07 07:23:39,918 INFO L226 Difference]: Without dead ends: 811 [2021-11-07 07:23:39,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:23:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-11-07 07:23:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2021-11-07 07:23:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 809 states have (on average 1.8739184177997528) internal successors, (1516), 810 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1516 transitions. [2021-11-07 07:23:39,958 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1516 transitions. Word has length 26 [2021-11-07 07:23:39,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:39,958 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1516 transitions. [2021-11-07 07:23:39,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1516 transitions. [2021-11-07 07:23:39,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 07:23:39,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:39,961 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:39,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:23:39,962 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:39,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:39,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-11-07 07:23:39,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:39,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484374448] [2021-11-07 07:23:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:39,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:40,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:40,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484374448] [2021-11-07 07:23:40,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484374448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:40,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:40,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:23:40,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935547016] [2021-11-07 07:23:40,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:23:40,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:40,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:23:40,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:23:40,053 INFO L87 Difference]: Start difference. First operand 811 states and 1516 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:40,092 INFO L93 Difference]: Finished difference Result 875 states and 1616 transitions. [2021-11-07 07:23:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:23:40,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 07:23:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:40,099 INFO L225 Difference]: With dead ends: 875 [2021-11-07 07:23:40,099 INFO L226 Difference]: Without dead ends: 840 [2021-11-07 07:23:40,100 INFO L786 BasicCegarLoop]: 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 [2021-11-07 07:23:40,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-11-07 07:23:40,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 838. [2021-11-07 07:23:40,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 836 states have (on average 1.8648325358851674) internal successors, (1559), 837 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1559 transitions. [2021-11-07 07:23:40,128 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1559 transitions. Word has length 41 [2021-11-07 07:23:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:40,129 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1559 transitions. [2021-11-07 07:23:40,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1559 transitions. [2021-11-07 07:23:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 07:23:40,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:40,132 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:40,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:23:40,132 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:40,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-11-07 07:23:40,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:40,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109467659] [2021-11-07 07:23:40,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:40,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:40,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:40,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109467659] [2021-11-07 07:23:40,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109467659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:40,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:40,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:23:40,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330723700] [2021-11-07 07:23:40,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:23:40,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:40,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:23:40,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:23:40,289 INFO L87 Difference]: Start difference. First operand 838 states and 1559 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:40,432 INFO L93 Difference]: Finished difference Result 1210 states and 2147 transitions. [2021-11-07 07:23:40,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:23:40,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 07:23:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:40,441 INFO L225 Difference]: With dead ends: 1210 [2021-11-07 07:23:40,441 INFO L226 Difference]: Without dead ends: 1148 [2021-11-07 07:23:40,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:23:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-11-07 07:23:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 898. [2021-11-07 07:23:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 896 states have (on average 1.84375) internal successors, (1652), 897 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1652 transitions. [2021-11-07 07:23:40,477 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1652 transitions. Word has length 41 [2021-11-07 07:23:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:40,478 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1652 transitions. [2021-11-07 07:23:40,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1652 transitions. [2021-11-07 07:23:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 07:23:40,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:40,488 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:40,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:23:40,489 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:40,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-11-07 07:23:40,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:40,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241959606] [2021-11-07 07:23:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:40,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:40,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:40,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241959606] [2021-11-07 07:23:40,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241959606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:40,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:40,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:23:40,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357828106] [2021-11-07 07:23:40,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:23:40,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:40,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:23:40,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:23:40,573 INFO L87 Difference]: Start difference. First operand 898 states and 1652 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:40,611 INFO L93 Difference]: Finished difference Result 1079 states and 1933 transitions. [2021-11-07 07:23:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:23:40,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 07:23:40,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:40,618 INFO L225 Difference]: With dead ends: 1079 [2021-11-07 07:23:40,618 INFO L226 Difference]: Without dead ends: 957 [2021-11-07 07:23:40,619 INFO L786 BasicCegarLoop]: 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 [2021-11-07 07:23:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-11-07 07:23:40,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2021-11-07 07:23:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 953 states have (on average 1.8237145855194123) internal successors, (1738), 954 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1738 transitions. [2021-11-07 07:23:40,649 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1738 transitions. Word has length 43 [2021-11-07 07:23:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:40,649 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 1738 transitions. [2021-11-07 07:23:40,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1738 transitions. [2021-11-07 07:23:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 07:23:40,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:40,651 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:40,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:23:40,652 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:40,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-11-07 07:23:40,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:40,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276079365] [2021-11-07 07:23:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:40,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:40,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:40,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276079365] [2021-11-07 07:23:40,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276079365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:40,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:40,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:23:40,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501827072] [2021-11-07 07:23:40,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:23:40,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:40,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:23:40,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:23:40,771 INFO L87 Difference]: Start difference. First operand 955 states and 1738 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:40,854 INFO L93 Difference]: Finished difference Result 1134 states and 2014 transitions. [2021-11-07 07:23:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:23:40,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 07:23:40,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:40,862 INFO L225 Difference]: With dead ends: 1134 [2021-11-07 07:23:40,862 INFO L226 Difference]: Without dead ends: 957 [2021-11-07 07:23:40,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:23:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-11-07 07:23:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 955. [2021-11-07 07:23:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 953 states have (on average 1.8205666316894018) internal successors, (1735), 954 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1735 transitions. [2021-11-07 07:23:40,892 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1735 transitions. Word has length 43 [2021-11-07 07:23:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:40,893 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 1735 transitions. [2021-11-07 07:23:40,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1735 transitions. [2021-11-07 07:23:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 07:23:40,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:40,894 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:40,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:23:40,895 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:40,895 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-11-07 07:23:40,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:40,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935730655] [2021-11-07 07:23:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:40,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:40,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:40,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935730655] [2021-11-07 07:23:40,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935730655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:40,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:40,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:23:40,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575447457] [2021-11-07 07:23:40,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:23:40,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:40,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:23:40,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:23:40,938 INFO L87 Difference]: Start difference. First operand 955 states and 1735 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:40,975 INFO L93 Difference]: Finished difference Result 1273 states and 2219 transitions. [2021-11-07 07:23:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:23:40,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 07:23:40,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:40,982 INFO L225 Difference]: With dead ends: 1273 [2021-11-07 07:23:40,983 INFO L226 Difference]: Without dead ends: 1096 [2021-11-07 07:23:40,983 INFO L786 BasicCegarLoop]: 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 [2021-11-07 07:23:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-11-07 07:23:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1094. [2021-11-07 07:23:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1092 states have (on average 1.7765567765567765) internal successors, (1940), 1093 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1940 transitions. [2021-11-07 07:23:41,019 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1940 transitions. Word has length 43 [2021-11-07 07:23:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:41,019 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1940 transitions. [2021-11-07 07:23:41,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1940 transitions. [2021-11-07 07:23:41,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 07:23:41,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:41,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:41,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:23:41,021 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-11-07 07:23:41,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:41,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619598952] [2021-11-07 07:23:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:41,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:41,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:41,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619598952] [2021-11-07 07:23:41,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619598952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:41,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:41,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:23:41,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541067482] [2021-11-07 07:23:41,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:23:41,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:41,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:23:41,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:23:41,059 INFO L87 Difference]: Start difference. First operand 1094 states and 1940 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:41,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:41,115 INFO L93 Difference]: Finished difference Result 1654 states and 2774 transitions. [2021-11-07 07:23:41,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:23:41,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 07:23:41,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:41,123 INFO L225 Difference]: With dead ends: 1654 [2021-11-07 07:23:41,123 INFO L226 Difference]: Without dead ends: 1338 [2021-11-07 07:23:41,125 INFO L786 BasicCegarLoop]: 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 [2021-11-07 07:23:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-11-07 07:23:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1336. [2021-11-07 07:23:41,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1334 states have (on average 1.712143928035982) internal successors, (2284), 1335 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:41,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2284 transitions. [2021-11-07 07:23:41,175 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2284 transitions. Word has length 43 [2021-11-07 07:23:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:41,176 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 2284 transitions. [2021-11-07 07:23:41,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2284 transitions. [2021-11-07 07:23:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:23:41,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:41,177 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:41,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:23:41,178 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:41,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:41,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-11-07 07:23:41,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:41,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634297347] [2021-11-07 07:23:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:41,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:41,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:41,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634297347] [2021-11-07 07:23:41,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634297347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:41,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:41,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:23:41,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827045686] [2021-11-07 07:23:41,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:23:41,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:41,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:23:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:23:41,286 INFO L87 Difference]: Start difference. First operand 1336 states and 2284 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:41,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:41,401 INFO L93 Difference]: Finished difference Result 1843 states and 2996 transitions. [2021-11-07 07:23:41,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:23:41,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 07:23:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:41,413 INFO L225 Difference]: With dead ends: 1843 [2021-11-07 07:23:41,413 INFO L226 Difference]: Without dead ends: 1841 [2021-11-07 07:23:41,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:23:41,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-11-07 07:23:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1384. [2021-11-07 07:23:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1382 states have (on average 1.6845151953690305) internal successors, (2328), 1383 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2328 transitions. [2021-11-07 07:23:41,495 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2328 transitions. Word has length 44 [2021-11-07 07:23:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:41,498 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2328 transitions. [2021-11-07 07:23:41,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:41,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2328 transitions. [2021-11-07 07:23:41,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 07:23:41,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:41,500 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:41,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:23:41,502 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:41,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1403516117, now seen corresponding path program 1 times [2021-11-07 07:23:41,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:41,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833949801] [2021-11-07 07:23:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:41,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:41,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:41,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833949801] [2021-11-07 07:23:41,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833949801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:41,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:41,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:23:41,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494065303] [2021-11-07 07:23:41,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:23:41,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:41,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:23:41,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:23:41,575 INFO L87 Difference]: Start difference. First operand 1384 states and 2328 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:45,454 INFO L93 Difference]: Finished difference Result 2888 states and 5201 transitions. [2021-11-07 07:23:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:23:45,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 07:23:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:45,466 INFO L225 Difference]: With dead ends: 2888 [2021-11-07 07:23:45,467 INFO L226 Difference]: Without dead ends: 2135 [2021-11-07 07:23:45,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:23:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-11-07 07:23:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2135. [2021-11-07 07:23:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2133 states have (on average 1.5729020159399907) internal successors, (3355), 2134 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3355 transitions. [2021-11-07 07:23:45,566 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3355 transitions. Word has length 48 [2021-11-07 07:23:45,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:45,567 INFO L470 AbstractCegarLoop]: Abstraction has 2135 states and 3355 transitions. [2021-11-07 07:23:45,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3355 transitions. [2021-11-07 07:23:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 07:23:45,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:45,569 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:45,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:23:45,570 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:45,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:45,570 INFO L85 PathProgramCache]: Analyzing trace with hash -638527781, now seen corresponding path program 1 times [2021-11-07 07:23:45,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:45,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328789173] [2021-11-07 07:23:45,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:45,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 07:23:45,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:45,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328789173] [2021-11-07 07:23:45,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328789173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:45,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:45,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:23:45,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352655016] [2021-11-07 07:23:45,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:23:45,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:45,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:23:45,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:23:45,635 INFO L87 Difference]: Start difference. First operand 2135 states and 3355 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:45,811 INFO L93 Difference]: Finished difference Result 4087 states and 6127 transitions. [2021-11-07 07:23:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:23:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 07:23:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:45,831 INFO L225 Difference]: With dead ends: 4087 [2021-11-07 07:23:45,832 INFO L226 Difference]: Without dead ends: 3481 [2021-11-07 07:23:45,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:23:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2021-11-07 07:23:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 2739. [2021-11-07 07:23:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2737 states have (on average 1.537084398976982) internal successors, (4207), 2738 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4207 transitions. [2021-11-07 07:23:45,958 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4207 transitions. Word has length 63 [2021-11-07 07:23:45,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:45,959 INFO L470 AbstractCegarLoop]: Abstraction has 2739 states and 4207 transitions. [2021-11-07 07:23:45,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4207 transitions. [2021-11-07 07:23:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 07:23:45,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:45,961 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:45,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:23:45,961 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:45,962 INFO L85 PathProgramCache]: Analyzing trace with hash 608979835, now seen corresponding path program 1 times [2021-11-07 07:23:45,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:45,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909718450] [2021-11-07 07:23:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:45,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 07:23:46,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:46,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909718450] [2021-11-07 07:23:46,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909718450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:46,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:46,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:23:46,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231507650] [2021-11-07 07:23:46,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:23:46,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:46,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:23:46,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:23:46,018 INFO L87 Difference]: Start difference. First operand 2739 states and 4207 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:46,258 INFO L93 Difference]: Finished difference Result 4691 states and 6979 transitions. [2021-11-07 07:23:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:23:46,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 07:23:46,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:46,283 INFO L225 Difference]: With dead ends: 4691 [2021-11-07 07:23:46,284 INFO L226 Difference]: Without dead ends: 4085 [2021-11-07 07:23:46,286 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:23:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-11-07 07:23:46,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3647. [2021-11-07 07:23:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 3645 states have (on average 1.5020576131687242) internal successors, (5475), 3646 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 5475 transitions. [2021-11-07 07:23:46,476 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 5475 transitions. Word has length 63 [2021-11-07 07:23:46,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:46,476 INFO L470 AbstractCegarLoop]: Abstraction has 3647 states and 5475 transitions. [2021-11-07 07:23:46,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 5475 transitions. [2021-11-07 07:23:46,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 07:23:46,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:46,478 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:46,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:23:46,479 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:46,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:46,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2078412817, now seen corresponding path program 1 times [2021-11-07 07:23:46,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:46,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380154131] [2021-11-07 07:23:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:46,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:23:46,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:46,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380154131] [2021-11-07 07:23:46,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380154131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:46,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:46,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:23:46,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868566346] [2021-11-07 07:23:46,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:23:46,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:46,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:23:46,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:23:46,553 INFO L87 Difference]: Start difference. First operand 3647 states and 5475 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:46,783 INFO L93 Difference]: Finished difference Result 4951 states and 7351 transitions. [2021-11-07 07:23:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:23:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 07:23:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:46,827 INFO L225 Difference]: With dead ends: 4951 [2021-11-07 07:23:46,827 INFO L226 Difference]: Without dead ends: 4517 [2021-11-07 07:23:46,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:23:46,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-11-07 07:23:47,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4079. [2021-11-07 07:23:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4079 states, 4077 states have (on average 1.493990679421143) internal successors, (6091), 4078 states have internal predecessors, (6091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4079 states to 4079 states and 6091 transitions. [2021-11-07 07:23:47,070 INFO L78 Accepts]: Start accepts. Automaton has 4079 states and 6091 transitions. Word has length 63 [2021-11-07 07:23:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:47,070 INFO L470 AbstractCegarLoop]: Abstraction has 4079 states and 6091 transitions. [2021-11-07 07:23:47,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4079 states and 6091 transitions. [2021-11-07 07:23:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:23:47,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:47,073 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:47,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:23:47,074 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:47,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:47,074 INFO L85 PathProgramCache]: Analyzing trace with hash 47222752, now seen corresponding path program 1 times [2021-11-07 07:23:47,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:47,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525963987] [2021-11-07 07:23:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:47,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:47,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:47,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525963987] [2021-11-07 07:23:47,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525963987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:47,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:47,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:23:47,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952086757] [2021-11-07 07:23:47,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:23:47,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:47,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:23:47,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:23:47,132 INFO L87 Difference]: Start difference. First operand 4079 states and 6091 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:47,306 INFO L93 Difference]: Finished difference Result 6631 states and 9693 transitions. [2021-11-07 07:23:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:23:47,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 07:23:47,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:47,316 INFO L225 Difference]: With dead ends: 6631 [2021-11-07 07:23:47,316 INFO L226 Difference]: Without dead ends: 4081 [2021-11-07 07:23:47,322 INFO L786 BasicCegarLoop]: 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 [2021-11-07 07:23:47,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4081 states. [2021-11-07 07:23:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4081 to 4079. [2021-11-07 07:23:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4079 states, 4077 states have (on average 1.4817267598724553) internal successors, (6041), 4078 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4079 states to 4079 states and 6041 transitions. [2021-11-07 07:23:47,584 INFO L78 Accepts]: Start accepts. Automaton has 4079 states and 6041 transitions. Word has length 64 [2021-11-07 07:23:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:47,584 INFO L470 AbstractCegarLoop]: Abstraction has 4079 states and 6041 transitions. [2021-11-07 07:23:47,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4079 states and 6041 transitions. [2021-11-07 07:23:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:23:47,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:47,586 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:47,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:23:47,587 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:47,587 INFO L85 PathProgramCache]: Analyzing trace with hash -39896042, now seen corresponding path program 1 times [2021-11-07 07:23:47,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:47,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354514528] [2021-11-07 07:23:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:47,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:47,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:47,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354514528] [2021-11-07 07:23:47,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354514528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:23:47,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:23:47,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:23:47,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935786972] [2021-11-07 07:23:47,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:23:47,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:23:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:23:47,640 INFO L87 Difference]: Start difference. First operand 4079 states and 6041 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:47,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:47,737 INFO L93 Difference]: Finished difference Result 5357 states and 7818 transitions. [2021-11-07 07:23:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:23:47,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 07:23:47,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:47,744 INFO L225 Difference]: With dead ends: 5357 [2021-11-07 07:23:47,744 INFO L226 Difference]: Without dead ends: 2807 [2021-11-07 07:23:47,750 INFO L786 BasicCegarLoop]: 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 [2021-11-07 07:23:47,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2021-11-07 07:23:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2805. [2021-11-07 07:23:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2803 states have (on average 1.5130217623974314) internal successors, (4241), 2804 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 4241 transitions. [2021-11-07 07:23:47,856 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 4241 transitions. Word has length 64 [2021-11-07 07:23:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:47,856 INFO L470 AbstractCegarLoop]: Abstraction has 2805 states and 4241 transitions. [2021-11-07 07:23:47,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 4241 transitions. [2021-11-07 07:23:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:23:47,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:47,858 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:47,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:23:47,859 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:47,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1159171252, now seen corresponding path program 1 times [2021-11-07 07:23:47,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:47,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338015374] [2021-11-07 07:23:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:47,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:48,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:48,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338015374] [2021-11-07 07:23:48,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338015374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:23:48,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105706008] [2021-11-07 07:23:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:48,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:23:48,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:23:48,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:23:48,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:23:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:48,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:23:48,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:23:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:23:48,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105706008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:23:48,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:23:48,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2021-11-07 07:23:48,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200449241] [2021-11-07 07:23:48,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:23:48,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:48,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:23:48,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:23:48,693 INFO L87 Difference]: Start difference. First operand 2805 states and 4241 transitions. Second operand has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:50,635 INFO L93 Difference]: Finished difference Result 9196 states and 12945 transitions. [2021-11-07 07:23:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:23:50,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 07:23:50,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:50,651 INFO L225 Difference]: With dead ends: 9196 [2021-11-07 07:23:50,651 INFO L226 Difference]: Without dead ends: 8222 [2021-11-07 07:23:50,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:23:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8222 states. [2021-11-07 07:23:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8222 to 5939. [2021-11-07 07:23:51,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5937 states have (on average 1.4195721744989052) internal successors, (8428), 5938 states have internal predecessors, (8428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 8428 transitions. [2021-11-07 07:23:51,020 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 8428 transitions. Word has length 64 [2021-11-07 07:23:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:51,021 INFO L470 AbstractCegarLoop]: Abstraction has 5939 states and 8428 transitions. [2021-11-07 07:23:51,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 8428 transitions. [2021-11-07 07:23:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:23:51,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:51,023 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:51,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:23:51,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:23:51,251 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:51,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:51,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1862030833, now seen corresponding path program 1 times [2021-11-07 07:23:51,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:51,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974285655] [2021-11-07 07:23:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:51,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:51,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:51,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974285655] [2021-11-07 07:23:51,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974285655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:23:51,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652216188] [2021-11-07 07:23:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:51,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:23:51,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:23:51,511 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:23:51,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:23:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:51,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:23:51,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:23:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:52,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652216188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:23:52,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:23:52,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-07 07:23:52,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975017950] [2021-11-07 07:23:52,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:23:52,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:52,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:23:52,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:23:52,800 INFO L87 Difference]: Start difference. First operand 5939 states and 8428 transitions. Second operand has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:23:56,140 INFO L93 Difference]: Finished difference Result 28219 states and 38166 transitions. [2021-11-07 07:23:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:23:56,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 07:23:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:23:56,193 INFO L225 Difference]: With dead ends: 28219 [2021-11-07 07:23:56,193 INFO L226 Difference]: Without dead ends: 23809 [2021-11-07 07:23:56,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:23:56,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23809 states. [2021-11-07 07:23:57,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23809 to 11219. [2021-11-07 07:23:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11219 states, 11217 states have (on average 1.3672104840866541) internal successors, (15336), 11218 states have internal predecessors, (15336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11219 states to 11219 states and 15336 transitions. [2021-11-07 07:23:57,320 INFO L78 Accepts]: Start accepts. Automaton has 11219 states and 15336 transitions. Word has length 65 [2021-11-07 07:23:57,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:23:57,320 INFO L470 AbstractCegarLoop]: Abstraction has 11219 states and 15336 transitions. [2021-11-07 07:23:57,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.764705882352941) internal successors, (115), 16 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:23:57,321 INFO L276 IsEmpty]: Start isEmpty. Operand 11219 states and 15336 transitions. [2021-11-07 07:23:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:23:57,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:23:57,323 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:23:57,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:23:57,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:23:57,542 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:23:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:23:57,543 INFO L85 PathProgramCache]: Analyzing trace with hash 664153647, now seen corresponding path program 1 times [2021-11-07 07:23:57,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:23:57,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246913527] [2021-11-07 07:23:57,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:57,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:23:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:57,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:23:57,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246913527] [2021-11-07 07:23:57,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246913527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:23:57,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520972901] [2021-11-07 07:23:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:23:57,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:23:57,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:23:57,752 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:23:57,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:23:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:23:57,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:23:57,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:23:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:23:59,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520972901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:23:59,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:23:59,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-07 07:23:59,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716674045] [2021-11-07 07:23:59,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:23:59,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:23:59,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:23:59,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:23:59,019 INFO L87 Difference]: Start difference. First operand 11219 states and 15336 transitions. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 16 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:02,873 INFO L93 Difference]: Finished difference Result 52315 states and 68974 transitions. [2021-11-07 07:24:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:24:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 16 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 07:24:02,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:02,976 INFO L225 Difference]: With dead ends: 52315 [2021-11-07 07:24:02,976 INFO L226 Difference]: Without dead ends: 42625 [2021-11-07 07:24:02,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:24:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42625 states. [2021-11-07 07:24:05,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42625 to 27973. [2021-11-07 07:24:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27973 states, 27971 states have (on average 1.3257302205856065) internal successors, (37082), 27972 states have internal predecessors, (37082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27973 states to 27973 states and 37082 transitions. [2021-11-07 07:24:05,327 INFO L78 Accepts]: Start accepts. Automaton has 27973 states and 37082 transitions. Word has length 65 [2021-11-07 07:24:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:05,327 INFO L470 AbstractCegarLoop]: Abstraction has 27973 states and 37082 transitions. [2021-11-07 07:24:05,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 16 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 27973 states and 37082 transitions. [2021-11-07 07:24:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:24:05,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:05,332 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:05,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:24:05,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:24:05,547 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:05,548 INFO L85 PathProgramCache]: Analyzing trace with hash -386254747, now seen corresponding path program 1 times [2021-11-07 07:24:05,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:05,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516660334] [2021-11-07 07:24:05,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:05,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:05,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:05,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516660334] [2021-11-07 07:24:05,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516660334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:05,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:05,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:24:05,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392847366] [2021-11-07 07:24:05,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:24:05,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:05,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:24:05,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:24:05,604 INFO L87 Difference]: Start difference. First operand 27973 states and 37082 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:06,688 INFO L93 Difference]: Finished difference Result 39431 states and 52074 transitions. [2021-11-07 07:24:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:24:06,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 07:24:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:06,714 INFO L225 Difference]: With dead ends: 39431 [2021-11-07 07:24:06,714 INFO L226 Difference]: Without dead ends: 12987 [2021-11-07 07:24:06,738 INFO L786 BasicCegarLoop]: 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 [2021-11-07 07:24:06,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12987 states. [2021-11-07 07:24:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12987 to 12110. [2021-11-07 07:24:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12110 states, 12108 states have (on average 1.3301949124545756) internal successors, (16106), 12109 states have internal predecessors, (16106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12110 states to 12110 states and 16106 transitions. [2021-11-07 07:24:07,568 INFO L78 Accepts]: Start accepts. Automaton has 12110 states and 16106 transitions. Word has length 65 [2021-11-07 07:24:07,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:07,569 INFO L470 AbstractCegarLoop]: Abstraction has 12110 states and 16106 transitions. [2021-11-07 07:24:07,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:07,569 INFO L276 IsEmpty]: Start isEmpty. Operand 12110 states and 16106 transitions. [2021-11-07 07:24:07,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:24:07,571 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:07,571 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:07,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 07:24:07,572 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1828535725, now seen corresponding path program 1 times [2021-11-07 07:24:07,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:07,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892036957] [2021-11-07 07:24:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:07,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:24:07,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:07,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892036957] [2021-11-07 07:24:07,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892036957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:07,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:07,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:24:07,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040546073] [2021-11-07 07:24:07,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:24:07,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:24:07,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:24:07,632 INFO L87 Difference]: Start difference. First operand 12110 states and 16106 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:08,485 INFO L93 Difference]: Finished difference Result 20901 states and 27479 transitions. [2021-11-07 07:24:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:24:08,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 07:24:08,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:08,501 INFO L225 Difference]: With dead ends: 20901 [2021-11-07 07:24:08,501 INFO L226 Difference]: Without dead ends: 10393 [2021-11-07 07:24:08,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:24:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10393 states. [2021-11-07 07:24:09,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10393 to 10393. [2021-11-07 07:24:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10393 states, 10391 states have (on average 1.3154653065152535) internal successors, (13669), 10392 states have internal predecessors, (13669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:09,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10393 states to 10393 states and 13669 transitions. [2021-11-07 07:24:09,213 INFO L78 Accepts]: Start accepts. Automaton has 10393 states and 13669 transitions. Word has length 65 [2021-11-07 07:24:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:09,213 INFO L470 AbstractCegarLoop]: Abstraction has 10393 states and 13669 transitions. [2021-11-07 07:24:09,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 10393 states and 13669 transitions. [2021-11-07 07:24:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:24:09,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:09,216 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:09,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 07:24:09,216 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash 269786861, now seen corresponding path program 1 times [2021-11-07 07:24:09,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:09,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053944807] [2021-11-07 07:24:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:09,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 07:24:09,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:09,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053944807] [2021-11-07 07:24:09,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053944807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:09,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:09,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:24:09,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631685649] [2021-11-07 07:24:09,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:24:09,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:09,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:24:09,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:24:09,277 INFO L87 Difference]: Start difference. First operand 10393 states and 13669 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:10,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:10,021 INFO L93 Difference]: Finished difference Result 16950 states and 21985 transitions. [2021-11-07 07:24:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:24:10,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 07:24:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:10,052 INFO L225 Difference]: With dead ends: 16950 [2021-11-07 07:24:10,052 INFO L226 Difference]: Without dead ends: 8197 [2021-11-07 07:24:10,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:24:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8197 states. [2021-11-07 07:24:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 8197. [2021-11-07 07:24:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8197 states, 8195 states have (on average 1.3126296522269676) internal successors, (10757), 8196 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8197 states to 8197 states and 10757 transitions. [2021-11-07 07:24:10,652 INFO L78 Accepts]: Start accepts. Automaton has 8197 states and 10757 transitions. Word has length 65 [2021-11-07 07:24:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:10,652 INFO L470 AbstractCegarLoop]: Abstraction has 8197 states and 10757 transitions. [2021-11-07 07:24:10,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 8197 states and 10757 transitions. [2021-11-07 07:24:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:24:10,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:10,655 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:10,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 07:24:10,655 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:10,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:10,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1061129165, now seen corresponding path program 1 times [2021-11-07 07:24:10,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:10,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643821071] [2021-11-07 07:24:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:10,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:24:10,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:10,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643821071] [2021-11-07 07:24:10,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643821071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:24:10,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:24:10,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:24:10,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733351158] [2021-11-07 07:24:10,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:24:10,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:10,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:24:10,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:24:10,719 INFO L87 Difference]: Start difference. First operand 8197 states and 10757 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:11,443 INFO L93 Difference]: Finished difference Result 13363 states and 17230 transitions. [2021-11-07 07:24:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:24:11,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 07:24:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:11,454 INFO L225 Difference]: With dead ends: 13363 [2021-11-07 07:24:11,454 INFO L226 Difference]: Without dead ends: 6730 [2021-11-07 07:24:11,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:24:11,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6730 states. [2021-11-07 07:24:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6730 to 6730. [2021-11-07 07:24:12,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6730 states, 6728 states have (on average 1.3210463733650417) internal successors, (8888), 6729 states have internal predecessors, (8888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6730 states to 6730 states and 8888 transitions. [2021-11-07 07:24:12,106 INFO L78 Accepts]: Start accepts. Automaton has 6730 states and 8888 transitions. Word has length 65 [2021-11-07 07:24:12,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:12,106 INFO L470 AbstractCegarLoop]: Abstraction has 6730 states and 8888 transitions. [2021-11-07 07:24:12,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6730 states and 8888 transitions. [2021-11-07 07:24:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:24:12,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:12,108 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:12,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 07:24:12,108 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:12,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:12,109 INFO L85 PathProgramCache]: Analyzing trace with hash 695787833, now seen corresponding path program 1 times [2021-11-07 07:24:12,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:12,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124970554] [2021-11-07 07:24:12,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:12,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:13,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:13,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124970554] [2021-11-07 07:24:13,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124970554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:13,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762972006] [2021-11-07 07:24:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:13,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:24:13,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:24:13,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:24:13,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:24:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:13,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 07:24:13,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:24:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:17,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762972006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:17,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:24:17,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2021-11-07 07:24:17,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483928953] [2021-11-07 07:24:17,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 07:24:17,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:17,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 07:24:17,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:24:17,312 INFO L87 Difference]: Start difference. First operand 6730 states and 8888 transitions. Second operand has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:23,231 INFO L93 Difference]: Finished difference Result 10293 states and 13433 transitions. [2021-11-07 07:24:23,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 07:24:23,231 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 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 [2021-11-07 07:24:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:23,241 INFO L225 Difference]: With dead ends: 10293 [2021-11-07 07:24:23,241 INFO L226 Difference]: Without dead ends: 8235 [2021-11-07 07:24:23,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1147, Invalid=6163, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:24:23,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8235 states. [2021-11-07 07:24:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8235 to 6593. [2021-11-07 07:24:23,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6593 states, 6591 states have (on average 1.3275678956152328) internal successors, (8750), 6592 states have internal predecessors, (8750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:23,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6593 states to 6593 states and 8750 transitions. [2021-11-07 07:24:23,744 INFO L78 Accepts]: Start accepts. Automaton has 6593 states and 8750 transitions. Word has length 66 [2021-11-07 07:24:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:23,744 INFO L470 AbstractCegarLoop]: Abstraction has 6593 states and 8750 transitions. [2021-11-07 07:24:23,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 6593 states and 8750 transitions. [2021-11-07 07:24:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:24:23,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:23,746 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:23,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:24:23,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 07:24:23,971 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:23,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1166524545, now seen corresponding path program 1 times [2021-11-07 07:24:23,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:23,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241728048] [2021-11-07 07:24:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:23,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:24,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:24,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241728048] [2021-11-07 07:24:24,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241728048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:24,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796389298] [2021-11-07 07:24:24,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:24,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:24:24,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:24:24,821 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:24:24,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:24:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:24:25,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:24:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:31,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796389298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:31,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:24:31,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2021-11-07 07:24:31,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148604940] [2021-11-07 07:24:31,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 07:24:31,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 07:24:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1515, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:24:31,322 INFO L87 Difference]: Start difference. First operand 6593 states and 8750 transitions. Second operand has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:48,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:48,775 INFO L93 Difference]: Finished difference Result 12086 states and 15536 transitions. [2021-11-07 07:24:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 07:24:48,775 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 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 [2021-11-07 07:24:48,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:48,786 INFO L225 Difference]: With dead ends: 12086 [2021-11-07 07:24:48,786 INFO L226 Difference]: Without dead ends: 10470 [2021-11-07 07:24:48,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=2197, Invalid=11845, Unknown=0, NotChecked=0, Total=14042 [2021-11-07 07:24:48,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10470 states. [2021-11-07 07:24:49,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10470 to 6671. [2021-11-07 07:24:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6669 states have (on average 1.3291348028190133) internal successors, (8864), 6670 states have internal predecessors, (8864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 8864 transitions. [2021-11-07 07:24:49,427 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 8864 transitions. Word has length 66 [2021-11-07 07:24:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:49,428 INFO L470 AbstractCegarLoop]: Abstraction has 6671 states and 8864 transitions. [2021-11-07 07:24:49,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.0) internal successors, (123), 41 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 8864 transitions. [2021-11-07 07:24:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 07:24:49,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:49,429 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:49,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:24:49,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 07:24:49,643 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash 184750935, now seen corresponding path program 1 times [2021-11-07 07:24:49,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:49,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867645307] [2021-11-07 07:24:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:49,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:50,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:50,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867645307] [2021-11-07 07:24:50,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867645307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:50,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519746305] [2021-11-07 07:24:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:50,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:24:50,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:24:50,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:24:50,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:24:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:50,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:24:50,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:24:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:53,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519746305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:53,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:24:53,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-11-07 07:24:53,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710703140] [2021-11-07 07:24:53,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:24:53,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:24:53,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:24:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:24:53,176 INFO L87 Difference]: Start difference. First operand 6671 states and 8864 transitions. Second operand has 28 states, 28 states have (on average 4.035714285714286) internal successors, (113), 28 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) [2021-11-07 07:24:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:24:58,251 INFO L93 Difference]: Finished difference Result 9152 states and 12029 transitions. [2021-11-07 07:24:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 07:24:58,252 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.035714285714286) internal successors, (113), 28 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 67 [2021-11-07 07:24:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:24:58,259 INFO L225 Difference]: With dead ends: 9152 [2021-11-07 07:24:58,259 INFO L226 Difference]: Without dead ends: 6852 [2021-11-07 07:24:58,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=908, Invalid=4204, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 07:24:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6852 states. [2021-11-07 07:24:58,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6852 to 5834. [2021-11-07 07:24:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5834 states, 5832 states have (on average 1.3391632373113855) internal successors, (7810), 5833 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:24:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5834 states to 5834 states and 7810 transitions. [2021-11-07 07:24:58,795 INFO L78 Accepts]: Start accepts. Automaton has 5834 states and 7810 transitions. Word has length 67 [2021-11-07 07:24:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:24:58,795 INFO L470 AbstractCegarLoop]: Abstraction has 5834 states and 7810 transitions. [2021-11-07 07:24:58,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.035714285714286) internal successors, (113), 28 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) [2021-11-07 07:24:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 5834 states and 7810 transitions. [2021-11-07 07:24:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 07:24:58,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:24:58,796 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:24:58,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:24:58,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 07:24:58,997 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:24:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:24:58,998 INFO L85 PathProgramCache]: Analyzing trace with hash 176449111, now seen corresponding path program 1 times [2021-11-07 07:24:58,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:24:58,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369658651] [2021-11-07 07:24:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:58,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:24:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:24:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:24:59,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:24:59,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369658651] [2021-11-07 07:24:59,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369658651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:24:59,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203350206] [2021-11-07 07:24:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:24:59,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:24:59,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:24:59,378 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:24:59,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:25:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:00,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 07:25:00,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:01,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203350206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:01,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:25:01,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-11-07 07:25:01,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536342889] [2021-11-07 07:25:01,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 07:25:01,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:01,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 07:25:01,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:25:01,954 INFO L87 Difference]: Start difference. First operand 5834 states and 7810 transitions. Second operand has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 27 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:04,704 INFO L93 Difference]: Finished difference Result 10016 states and 13171 transitions. [2021-11-07 07:25:04,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:25:04,704 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 27 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 07:25:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:04,713 INFO L225 Difference]: With dead ends: 10016 [2021-11-07 07:25:04,713 INFO L226 Difference]: Without dead ends: 7977 [2021-11-07 07:25:04,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=531, Invalid=1821, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:25:04,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2021-11-07 07:25:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 4957. [2021-11-07 07:25:05,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4955 states have (on average 1.3580221997981836) internal successors, (6729), 4956 states have internal predecessors, (6729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 6729 transitions. [2021-11-07 07:25:05,237 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 6729 transitions. Word has length 67 [2021-11-07 07:25:05,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:05,238 INFO L470 AbstractCegarLoop]: Abstraction has 4957 states and 6729 transitions. [2021-11-07 07:25:05,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 27 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 6729 transitions. [2021-11-07 07:25:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 07:25:05,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:05,239 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:05,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-07 07:25:05,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:25:05,440 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash 561901135, now seen corresponding path program 1 times [2021-11-07 07:25:05,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:05,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736259913] [2021-11-07 07:25:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:05,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:05,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:05,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736259913] [2021-11-07 07:25:05,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736259913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:05,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461752782] [2021-11-07 07:25:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:05,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:25:05,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:25:05,916 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:25:05,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:25:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:06,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:25:06,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:09,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461752782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:09,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:25:09,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-11-07 07:25:09,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568239636] [2021-11-07 07:25:09,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:25:09,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:09,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:25:09,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:25:09,447 INFO L87 Difference]: Start difference. First operand 4957 states and 6729 transitions. Second operand has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:11,846 INFO L93 Difference]: Finished difference Result 7227 states and 9514 transitions. [2021-11-07 07:25:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:25:11,846 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 07:25:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:11,853 INFO L225 Difference]: With dead ends: 7227 [2021-11-07 07:25:11,853 INFO L226 Difference]: Without dead ends: 5438 [2021-11-07 07:25:11,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:25:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5438 states. [2021-11-07 07:25:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5438 to 4105. [2021-11-07 07:25:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4103 states have (on average 1.386058981233244) internal successors, (5687), 4104 states have internal predecessors, (5687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5687 transitions. [2021-11-07 07:25:12,247 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5687 transitions. Word has length 68 [2021-11-07 07:25:12,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:12,247 INFO L470 AbstractCegarLoop]: Abstraction has 4105 states and 5687 transitions. [2021-11-07 07:25:12,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:25:12,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5687 transitions. [2021-11-07 07:25:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 07:25:12,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:12,250 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:12,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 07:25:12,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 07:25:12,475 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:25:12,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:12,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1362039845, now seen corresponding path program 1 times [2021-11-07 07:25:12,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:12,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317705094] [2021-11-07 07:25:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:12,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 30 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:12,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:12,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317705094] [2021-11-07 07:25:12,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317705094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:12,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027558071] [2021-11-07 07:25:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:12,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:25:12,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:25:12,806 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:25:12,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a03a981-71bb-4930-bdf4-893b9821a1c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:25:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:13,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:25:13,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:26:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 68 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:01,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027558071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:26:01,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:26:01,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-07 07:26:01,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310684324] [2021-11-07 07:26:01,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:26:01,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:26:01,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:26:01,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=347, Unknown=21, NotChecked=0, Total=420 [2021-11-07 07:26:01,885 INFO L87 Difference]: Start difference. First operand 4105 states and 5687 transitions. Second operand has 21 states, 21 states have (on average 9.714285714285714) internal successors, (204), 20 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)