./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0 --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 52f795f47ad9dd0b1b0499f649b5f623fed211e53433ed6d87534c63dbfae98b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:21:23,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:21:23,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:21:23,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:21:23,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:21:23,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:21:23,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:21:23,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:21:23,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:21:23,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:21:23,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:21:23,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:21:23,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:21:23,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:21:23,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:21:23,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:21:23,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:21:23,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:21:23,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:21:23,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:21:23,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:21:23,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:21:23,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:21:23,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:21:23,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:21:23,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:21:23,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:21:23,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:21:23,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:21:23,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:21:23,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:21:23,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:21:23,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:21:23,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:21:23,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:21:23,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:21:23,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:21:23,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:21:23,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:21:23,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:21:23,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:21:23,808 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 16:21:23,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:21:23,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:21:23,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:21:23,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:21:23,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:21:23,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:21:23,845 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:21:23,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:21:23,845 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:21:23,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:21:23,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:21:23,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:21:23,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:21:23,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:21:23,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:21:23,848 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:21:23,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:21:23,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:21:23,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:21:23,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:21:23,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:21:23,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:21:23,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:21:23,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:21:23,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:21:23,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:21:23,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:21:23,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:21:23,852 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:21:23,852 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:21:23,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:21:23,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:21:23,853 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_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52f795f47ad9dd0b1b0499f649b5f623fed211e53433ed6d87534c63dbfae98b [2021-11-22 16:21:24,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:21:24,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:21:24,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:21:24,211 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:21:24,212 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:21:24,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c [2021-11-22 16:21:24,333 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/data/56865f5ec/cf15ce699d1149ada5b76b73764a28b9/FLAG0b6b6ea1b [2021-11-22 16:21:25,037 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:21:25,052 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c [2021-11-22 16:21:25,073 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/data/56865f5ec/cf15ce699d1149ada5b76b73764a28b9/FLAG0b6b6ea1b [2021-11-22 16:21:25,320 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/data/56865f5ec/cf15ce699d1149ada5b76b73764a28b9 [2021-11-22 16:21:25,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:21:25,326 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:21:25,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:21:25,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:21:25,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:21:25,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:25,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@197ac73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25, skipping insertion in model container [2021-11-22 16:21:25,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:25,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:21:25,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:21:25,808 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c[8305,8318] [2021-11-22 16:21:25,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:21:25,833 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:21:25,930 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c[8305,8318] [2021-11-22 16:21:25,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:21:25,961 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:21:25,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25 WrapperNode [2021-11-22 16:21:25,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:21:25,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:21:25,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:21:25,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:21:25,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,062 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 274 [2021-11-22 16:21:26,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:21:26,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:21:26,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:21:26,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:21:26,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:21:26,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:21:26,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:21:26,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:21:26,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (1/1) ... [2021-11-22 16:21:26,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:21:26,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:26,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:21:26,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:21:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:21:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:21:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:21:26,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:21:26,373 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:21:26,376 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:21:27,112 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:21:27,128 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:21:27,128 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 16:21:27,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:21:27 BoogieIcfgContainer [2021-11-22 16:21:27,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:21:27,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:21:27,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:21:27,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:21:27,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:21:25" (1/3) ... [2021-11-22 16:21:27,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639a2209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:21:27, skipping insertion in model container [2021-11-22 16:21:27,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:21:25" (2/3) ... [2021-11-22 16:21:27,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639a2209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:21:27, skipping insertion in model container [2021-11-22 16:21:27,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:21:27" (3/3) ... [2021-11-22 16:21:27,150 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c [2021-11-22 16:21:27,157 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:21:27,158 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 16:21:27,226 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:21:27,240 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 [2021-11-22 16:21:27,240 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 16:21:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 78 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 16:21:27,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:27,300 INFO L514 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] [2021-11-22 16:21:27,301 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:27,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash -171388107, now seen corresponding path program 1 times [2021-11-22 16:21:27,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:27,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382824508] [2021-11-22 16:21:27,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:27,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:27,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:27,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382824508] [2021-11-22 16:21:27,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382824508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:27,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:27,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:21:27,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216804299] [2021-11-22 16:21:27,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:27,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 16:21:27,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:27,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 16:21:27,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 16:21:27,696 INFO L87 Difference]: Start difference. First operand has 79 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 78 states have internal predecessors, (131), 0 states have call successors, (0), 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 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:27,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:27,730 INFO L93 Difference]: Finished difference Result 126 states and 207 transitions. [2021-11-22 16:21:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 16:21:27,733 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-22 16:21:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:27,747 INFO L225 Difference]: With dead ends: 126 [2021-11-22 16:21:27,748 INFO L226 Difference]: Without dead ends: 75 [2021-11-22 16:21:27,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 16:21:27,758 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:27,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:21:27,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-22 16:21:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-22 16:21:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.6756756756756757) internal successors, (124), 74 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 124 transitions. [2021-11-22 16:21:27,817 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 124 transitions. Word has length 29 [2021-11-22 16:21:27,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:27,818 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 124 transitions. [2021-11-22 16:21:27,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 124 transitions. [2021-11-22 16:21:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 16:21:27,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:27,822 INFO L514 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] [2021-11-22 16:21:27,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:21:27,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:27,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:27,824 INFO L85 PathProgramCache]: Analyzing trace with hash -305401613, now seen corresponding path program 1 times [2021-11-22 16:21:27,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:27,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858327093] [2021-11-22 16:21:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:27,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:27,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:27,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858327093] [2021-11-22 16:21:27,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858327093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:27,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:27,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:21:27,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29289580] [2021-11-22 16:21:27,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:27,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:21:27,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:21:27,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:21:27,976 INFO L87 Difference]: Start difference. First operand 75 states and 124 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:28,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:28,143 INFO L93 Difference]: Finished difference Result 125 states and 200 transitions. [2021-11-22 16:21:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:21:28,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-22 16:21:28,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:28,146 INFO L225 Difference]: With dead ends: 125 [2021-11-22 16:21:28,147 INFO L226 Difference]: Without dead ends: 75 [2021-11-22 16:21:28,148 INFO L932 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 [2021-11-22 16:21:28,150 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 3 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:28,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 462 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:21:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-22 16:21:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-22 16:21:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.364864864864865) internal successors, (101), 74 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2021-11-22 16:21:28,165 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 29 [2021-11-22 16:21:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:28,165 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2021-11-22 16:21:28,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2021-11-22 16:21:28,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 16:21:28,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:28,168 INFO L514 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, 1, 1, 1] [2021-11-22 16:21:28,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:21:28,169 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:28,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1295954354, now seen corresponding path program 1 times [2021-11-22 16:21:28,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:28,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644105815] [2021-11-22 16:21:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:28,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:28,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:28,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644105815] [2021-11-22 16:21:28,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644105815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:28,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:28,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:28,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987116439] [2021-11-22 16:21:28,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:28,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:28,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:28,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:28,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:28,340 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:28,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:28,398 INFO L93 Difference]: Finished difference Result 161 states and 235 transitions. [2021-11-22 16:21:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:28,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-22 16:21:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:28,403 INFO L225 Difference]: With dead ends: 161 [2021-11-22 16:21:28,407 INFO L226 Difference]: Without dead ends: 115 [2021-11-22 16:21:28,408 INFO L932 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 [2021-11-22 16:21:28,411 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 58 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:28,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 217 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:21:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-22 16:21:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2021-11-22 16:21:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4375) internal successors, (161), 112 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:28,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2021-11-22 16:21:28,435 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 51 [2021-11-22 16:21:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:28,435 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2021-11-22 16:21:28,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2021-11-22 16:21:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 16:21:28,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:28,439 INFO L514 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, 1, 1, 1] [2021-11-22 16:21:28,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 16:21:28,440 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:28,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:28,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1404728260, now seen corresponding path program 1 times [2021-11-22 16:21:28,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:28,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123903231] [2021-11-22 16:21:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:28,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:28,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:28,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123903231] [2021-11-22 16:21:28,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123903231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:28,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:28,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:28,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707672109] [2021-11-22 16:21:28,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:28,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:28,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:28,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:28,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:28,581 INFO L87 Difference]: Start difference. First operand 113 states and 161 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:28,677 INFO L93 Difference]: Finished difference Result 269 states and 405 transitions. [2021-11-22 16:21:28,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:28,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-22 16:21:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:28,681 INFO L225 Difference]: With dead ends: 269 [2021-11-22 16:21:28,681 INFO L226 Difference]: Without dead ends: 185 [2021-11-22 16:21:28,682 INFO L932 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 [2021-11-22 16:21:28,684 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 54 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:28,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 216 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:21:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-22 16:21:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-11-22 16:21:28,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 182 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 270 transitions. [2021-11-22 16:21:28,713 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 270 transitions. Word has length 51 [2021-11-22 16:21:28,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:28,714 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 270 transitions. [2021-11-22 16:21:28,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:28,715 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 270 transitions. [2021-11-22 16:21:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 16:21:28,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:28,718 INFO L514 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, 1, 1, 1] [2021-11-22 16:21:28,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 16:21:28,718 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:28,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:28,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1742521402, now seen corresponding path program 1 times [2021-11-22 16:21:28,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:28,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386423244] [2021-11-22 16:21:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:28,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:28,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386423244] [2021-11-22 16:21:28,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386423244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:28,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:28,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:21:28,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661899840] [2021-11-22 16:21:28,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:28,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:21:28,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:28,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:21:28,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:21:28,887 INFO L87 Difference]: Start difference. First operand 183 states and 270 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:29,260 INFO L93 Difference]: Finished difference Result 1415 states and 2198 transitions. [2021-11-22 16:21:29,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:21:29,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-22 16:21:29,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:29,278 INFO L225 Difference]: With dead ends: 1415 [2021-11-22 16:21:29,278 INFO L226 Difference]: Without dead ends: 1261 [2021-11-22 16:21:29,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:21:29,294 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 761 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:29,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 862 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:21:29,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-11-22 16:21:29,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 335. [2021-11-22 16:21:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.5029940119760479) internal successors, (502), 334 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 502 transitions. [2021-11-22 16:21:29,383 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 502 transitions. Word has length 51 [2021-11-22 16:21:29,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:29,384 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 502 transitions. [2021-11-22 16:21:29,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 502 transitions. [2021-11-22 16:21:29,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-22 16:21:29,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:29,393 INFO L514 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, 1, 1, 1, 1, 1] [2021-11-22 16:21:29,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 16:21:29,394 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:29,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1889876246, now seen corresponding path program 1 times [2021-11-22 16:21:29,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:29,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254890616] [2021-11-22 16:21:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:29,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:29,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:29,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254890616] [2021-11-22 16:21:29,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254890616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:29,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:29,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:29,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798397435] [2021-11-22 16:21:29,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:29,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:29,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:29,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:29,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:29,530 INFO L87 Difference]: Start difference. First operand 335 states and 502 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:29,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:29,592 INFO L93 Difference]: Finished difference Result 903 states and 1372 transitions. [2021-11-22 16:21:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:29,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-22 16:21:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:29,598 INFO L225 Difference]: With dead ends: 903 [2021-11-22 16:21:29,598 INFO L226 Difference]: Without dead ends: 597 [2021-11-22 16:21:29,599 INFO L932 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 [2021-11-22 16:21:29,603 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 41 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:29,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 162 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:21:29,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-22 16:21:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 587. [2021-11-22 16:21:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.484641638225256) internal successors, (870), 586 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 870 transitions. [2021-11-22 16:21:29,664 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 870 transitions. Word has length 53 [2021-11-22 16:21:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:29,665 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 870 transitions. [2021-11-22 16:21:29,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 870 transitions. [2021-11-22 16:21:29,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-22 16:21:29,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:29,668 INFO L514 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, 1, 1, 1, 1, 1] [2021-11-22 16:21:29,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 16:21:29,669 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:29,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1823382734, now seen corresponding path program 1 times [2021-11-22 16:21:29,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:29,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569837721] [2021-11-22 16:21:29,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:29,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:29,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:29,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569837721] [2021-11-22 16:21:29,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569837721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:29,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:29,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:21:29,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203176868] [2021-11-22 16:21:29,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:29,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:21:29,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:29,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:21:29,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:21:29,974 INFO L87 Difference]: Start difference. First operand 587 states and 870 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:30,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:30,169 INFO L93 Difference]: Finished difference Result 1147 states and 1712 transitions. [2021-11-22 16:21:30,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:21:30,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-22 16:21:30,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:30,176 INFO L225 Difference]: With dead ends: 1147 [2021-11-22 16:21:30,176 INFO L226 Difference]: Without dead ends: 589 [2021-11-22 16:21:30,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:21:30,182 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 154 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:30,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 391 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:21:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-22 16:21:30,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 587. [2021-11-22 16:21:30,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 1.47098976109215) internal successors, (862), 586 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 862 transitions. [2021-11-22 16:21:30,230 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 862 transitions. Word has length 53 [2021-11-22 16:21:30,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:30,231 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 862 transitions. [2021-11-22 16:21:30,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:30,232 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 862 transitions. [2021-11-22 16:21:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-22 16:21:30,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:30,236 INFO L514 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, 1, 1, 1, 1, 1] [2021-11-22 16:21:30,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 16:21:30,236 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:30,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:30,239 INFO L85 PathProgramCache]: Analyzing trace with hash -34468658, now seen corresponding path program 1 times [2021-11-22 16:21:30,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:30,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413687853] [2021-11-22 16:21:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:30,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:30,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:30,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413687853] [2021-11-22 16:21:30,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413687853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:30,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:30,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:30,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50334848] [2021-11-22 16:21:30,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:30,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:30,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:30,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:30,313 INFO L87 Difference]: Start difference. First operand 587 states and 862 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:30,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:30,402 INFO L93 Difference]: Finished difference Result 1607 states and 2368 transitions. [2021-11-22 16:21:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:30,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-22 16:21:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:30,413 INFO L225 Difference]: With dead ends: 1607 [2021-11-22 16:21:30,413 INFO L226 Difference]: Without dead ends: 1049 [2021-11-22 16:21:30,415 INFO L932 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 [2021-11-22 16:21:30,416 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 50 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:30,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 216 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:21:30,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-11-22 16:21:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1047. [2021-11-22 16:21:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 1.4512428298279159) internal successors, (1518), 1046 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1518 transitions. [2021-11-22 16:21:30,513 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1518 transitions. Word has length 53 [2021-11-22 16:21:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:30,518 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 1518 transitions. [2021-11-22 16:21:30,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1518 transitions. [2021-11-22 16:21:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 16:21:30,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:30,521 INFO L514 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, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:30,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 16:21:30,522 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:30,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1105013027, now seen corresponding path program 1 times [2021-11-22 16:21:30,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:30,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434220259] [2021-11-22 16:21:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:30,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:30,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:30,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434220259] [2021-11-22 16:21:30,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434220259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:30,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:30,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 16:21:30,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224471702] [2021-11-22 16:21:30,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:30,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:21:30,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:21:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:21:30,729 INFO L87 Difference]: Start difference. First operand 1047 states and 1518 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:31,059 INFO L93 Difference]: Finished difference Result 1817 states and 2619 transitions. [2021-11-22 16:21:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 16:21:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-22 16:21:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:31,075 INFO L225 Difference]: With dead ends: 1817 [2021-11-22 16:21:31,075 INFO L226 Difference]: Without dead ends: 1815 [2021-11-22 16:21:31,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-22 16:21:31,079 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 498 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:31,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 506 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:21:31,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-11-22 16:21:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1095. [2021-11-22 16:21:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 1.4241316270566728) internal successors, (1558), 1094 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1558 transitions. [2021-11-22 16:21:31,230 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1558 transitions. Word has length 54 [2021-11-22 16:21:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:31,230 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 1558 transitions. [2021-11-22 16:21:31,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1558 transitions. [2021-11-22 16:21:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-22 16:21:31,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:31,233 INFO L514 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:31,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 16:21:31,233 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:31,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:31,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1044582089, now seen corresponding path program 1 times [2021-11-22 16:21:31,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:31,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303983260] [2021-11-22 16:21:31,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:31,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:31,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:31,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303983260] [2021-11-22 16:21:31,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303983260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:31,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:31,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:31,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415305338] [2021-11-22 16:21:31,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:31,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:31,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:31,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:31,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:31,295 INFO L87 Difference]: Start difference. First operand 1095 states and 1558 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:31,445 INFO L93 Difference]: Finished difference Result 2190 states and 3148 transitions. [2021-11-22 16:21:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:31,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-22 16:21:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:31,458 INFO L225 Difference]: With dead ends: 2190 [2021-11-22 16:21:31,459 INFO L226 Difference]: Without dead ends: 1579 [2021-11-22 16:21:31,460 INFO L932 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 [2021-11-22 16:21:31,462 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 59 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:31,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 222 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:21:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-11-22 16:21:31,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1577. [2021-11-22 16:21:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 1.416243654822335) internal successors, (2232), 1576 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2232 transitions. [2021-11-22 16:21:31,637 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2232 transitions. Word has length 55 [2021-11-22 16:21:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:31,638 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 2232 transitions. [2021-11-22 16:21:31,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2232 transitions. [2021-11-22 16:21:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-22 16:21:31,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:31,641 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:31,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 16:21:31,642 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:31,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:31,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1276698888, now seen corresponding path program 1 times [2021-11-22 16:21:31,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:31,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637317094] [2021-11-22 16:21:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:31,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:21:31,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:31,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637317094] [2021-11-22 16:21:31,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637317094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:31,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:31,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:21:31,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021059298] [2021-11-22 16:21:31,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:31,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:21:31,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:21:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:21:31,770 INFO L87 Difference]: Start difference. First operand 1577 states and 2232 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:32,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:32,453 INFO L93 Difference]: Finished difference Result 8083 states and 11473 transitions. [2021-11-22 16:21:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:21:32,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-22 16:21:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:32,504 INFO L225 Difference]: With dead ends: 8083 [2021-11-22 16:21:32,504 INFO L226 Difference]: Without dead ends: 6537 [2021-11-22 16:21:32,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:21:32,512 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 467 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:32,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 493 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:21:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6537 states. [2021-11-22 16:21:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6537 to 3121. [2021-11-22 16:21:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 3120 states have (on average 1.412820512820513) internal successors, (4408), 3120 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4408 transitions. [2021-11-22 16:21:32,928 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4408 transitions. Word has length 78 [2021-11-22 16:21:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:32,929 INFO L470 AbstractCegarLoop]: Abstraction has 3121 states and 4408 transitions. [2021-11-22 16:21:32,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4408 transitions. [2021-11-22 16:21:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-22 16:21:32,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:32,941 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:32,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 16:21:32,941 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:32,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:32,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1827496306, now seen corresponding path program 1 times [2021-11-22 16:21:32,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:32,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184436298] [2021-11-22 16:21:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:32,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 16:21:33,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:33,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184436298] [2021-11-22 16:21:33,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184436298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:33,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:33,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:21:33,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342776880] [2021-11-22 16:21:33,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:33,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:21:33,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:21:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:21:33,101 INFO L87 Difference]: Start difference. First operand 3121 states and 4408 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:33,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:33,823 INFO L93 Difference]: Finished difference Result 9627 states and 13649 transitions. [2021-11-22 16:21:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:21:33,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-22 16:21:33,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:33,884 INFO L225 Difference]: With dead ends: 9627 [2021-11-22 16:21:33,884 INFO L226 Difference]: Without dead ends: 8081 [2021-11-22 16:21:33,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:21:33,889 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 419 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:33,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 540 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:21:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8081 states. [2021-11-22 16:21:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8081 to 5441. [2021-11-22 16:21:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 1.4066176470588236) internal successors, (7652), 5440 states have internal predecessors, (7652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 7652 transitions. [2021-11-22 16:21:34,450 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 7652 transitions. Word has length 78 [2021-11-22 16:21:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:34,450 INFO L470 AbstractCegarLoop]: Abstraction has 5441 states and 7652 transitions. [2021-11-22 16:21:34,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 7652 transitions. [2021-11-22 16:21:34,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-22 16:21:34,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:34,454 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:34,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 16:21:34,454 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:34,455 INFO L85 PathProgramCache]: Analyzing trace with hash -695856466, now seen corresponding path program 1 times [2021-11-22 16:21:34,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:34,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012691129] [2021-11-22 16:21:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:34,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:21:34,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:34,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012691129] [2021-11-22 16:21:34,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012691129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:34,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:34,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:21:34,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111278717] [2021-11-22 16:21:34,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:34,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:21:34,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:34,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:21:34,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:21:34,566 INFO L87 Difference]: Start difference. First operand 5441 states and 7652 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:35,433 INFO L93 Difference]: Finished difference Result 11171 states and 15825 transitions. [2021-11-22 16:21:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:21:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-22 16:21:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:35,486 INFO L225 Difference]: With dead ends: 11171 [2021-11-22 16:21:35,487 INFO L226 Difference]: Without dead ends: 9625 [2021-11-22 16:21:35,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:21:35,493 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 453 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:35,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 557 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:21:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9625 states. [2021-11-22 16:21:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9625 to 6985. [2021-11-22 16:21:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6985 states, 6984 states have (on average 1.407216494845361) internal successors, (9828), 6984 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6985 states to 6985 states and 9828 transitions. [2021-11-22 16:21:36,176 INFO L78 Accepts]: Start accepts. Automaton has 6985 states and 9828 transitions. Word has length 78 [2021-11-22 16:21:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:36,177 INFO L470 AbstractCegarLoop]: Abstraction has 6985 states and 9828 transitions. [2021-11-22 16:21:36,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 6985 states and 9828 transitions. [2021-11-22 16:21:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 16:21:36,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:36,181 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:36,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 16:21:36,182 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:36,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1015584653, now seen corresponding path program 1 times [2021-11-22 16:21:36,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:36,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600557151] [2021-11-22 16:21:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:36,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:21:36,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:36,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600557151] [2021-11-22 16:21:36,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600557151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:36,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:36,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:21:36,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608155887] [2021-11-22 16:21:36,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:36,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:21:36,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:36,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:21:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:21:36,279 INFO L87 Difference]: Start difference. First operand 6985 states and 9828 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:37,163 INFO L93 Difference]: Finished difference Result 11803 states and 16737 transitions. [2021-11-22 16:21:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:21:37,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-22 16:21:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:37,191 INFO L225 Difference]: With dead ends: 11803 [2021-11-22 16:21:37,191 INFO L226 Difference]: Without dead ends: 10713 [2021-11-22 16:21:37,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:21:37,198 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 449 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:37,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 493 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:21:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10713 states. [2021-11-22 16:21:37,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10713 to 8073. [2021-11-22 16:21:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8072 states have (on average 1.4098116947472745) internal successors, (11380), 8072 states have internal predecessors, (11380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 11380 transitions. [2021-11-22 16:21:37,904 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 11380 transitions. Word has length 80 [2021-11-22 16:21:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:37,905 INFO L470 AbstractCegarLoop]: Abstraction has 8073 states and 11380 transitions. [2021-11-22 16:21:37,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:37,906 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 11380 transitions. [2021-11-22 16:21:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 16:21:37,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:37,909 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:37,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 16:21:37,910 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash 103810672, now seen corresponding path program 1 times [2021-11-22 16:21:37,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:37,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246644989] [2021-11-22 16:21:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:37,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:37,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:37,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246644989] [2021-11-22 16:21:37,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246644989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:37,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:37,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:37,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573764685] [2021-11-22 16:21:37,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:37,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:37,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:37,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:37,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:37,961 INFO L87 Difference]: Start difference. First operand 8073 states and 11380 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:38,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:38,363 INFO L93 Difference]: Finished difference Result 14087 states and 19949 transitions. [2021-11-22 16:21:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:38,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-22 16:21:38,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:38,376 INFO L225 Difference]: With dead ends: 14087 [2021-11-22 16:21:38,376 INFO L226 Difference]: Without dead ends: 6045 [2021-11-22 16:21:38,386 INFO L932 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 [2021-11-22 16:21:38,387 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 45 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:38,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 218 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:21:38,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6045 states. [2021-11-22 16:21:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6045 to 6043. [2021-11-22 16:21:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6043 states, 6042 states have (on average 1.408474015226746) internal successors, (8510), 6042 states have internal predecessors, (8510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6043 states to 6043 states and 8510 transitions. [2021-11-22 16:21:38,786 INFO L78 Accepts]: Start accepts. Automaton has 6043 states and 8510 transitions. Word has length 80 [2021-11-22 16:21:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:38,787 INFO L470 AbstractCegarLoop]: Abstraction has 6043 states and 8510 transitions. [2021-11-22 16:21:38,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6043 states and 8510 transitions. [2021-11-22 16:21:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 16:21:38,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:38,790 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:38,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 16:21:38,791 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:38,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:38,791 INFO L85 PathProgramCache]: Analyzing trace with hash 61640365, now seen corresponding path program 1 times [2021-11-22 16:21:38,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:38,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057010870] [2021-11-22 16:21:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:38,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:38,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:38,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057010870] [2021-11-22 16:21:38,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057010870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:21:38,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:21:38,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:21:38,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082691741] [2021-11-22 16:21:38,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:21:38,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:21:38,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:38,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:21:38,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:21:38,848 INFO L87 Difference]: Start difference. First operand 6043 states and 8510 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:39,068 INFO L93 Difference]: Finished difference Result 9039 states and 12736 transitions. [2021-11-22 16:21:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:21:39,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-22 16:21:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:39,073 INFO L225 Difference]: With dead ends: 9039 [2021-11-22 16:21:39,073 INFO L226 Difference]: Without dead ends: 3053 [2021-11-22 16:21:39,079 INFO L932 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 [2021-11-22 16:21:39,080 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 39 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:39,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 197 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:21:39,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3053 states. [2021-11-22 16:21:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3053 to 3051. [2021-11-22 16:21:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 3050 states have (on average 1.3908196721311474) internal successors, (4242), 3050 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 4242 transitions. [2021-11-22 16:21:39,286 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 4242 transitions. Word has length 81 [2021-11-22 16:21:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:39,286 INFO L470 AbstractCegarLoop]: Abstraction has 3051 states and 4242 transitions. [2021-11-22 16:21:39,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 4242 transitions. [2021-11-22 16:21:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 16:21:39,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:39,288 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:39,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 16:21:39,289 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:39,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:39,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1057634845, now seen corresponding path program 1 times [2021-11-22 16:21:39,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:39,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957868054] [2021-11-22 16:21:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:39,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:39,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957868054] [2021-11-22 16:21:39,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957868054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520659830] [2021-11-22 16:21:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:39,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:39,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:39,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:39,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:21:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:39,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 16:21:39,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:21:40,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:21:40,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520659830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:40,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:40,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-11-22 16:21:40,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242053570] [2021-11-22 16:21:40,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:40,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 16:21:40,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:40,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 16:21:40,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:21:40,561 INFO L87 Difference]: Start difference. First operand 3051 states and 4242 transitions. Second operand has 14 states, 14 states have (on average 16.214285714285715) internal successors, (227), 14 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:45,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:45,072 INFO L93 Difference]: Finished difference Result 32079 states and 44355 transitions. [2021-11-22 16:21:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-22 16:21:45,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 16.214285714285715) internal successors, (227), 14 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-22 16:21:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:45,119 INFO L225 Difference]: With dead ends: 32079 [2021-11-22 16:21:45,119 INFO L226 Difference]: Without dead ends: 29085 [2021-11-22 16:21:45,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 16:21:45,131 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 2508 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2508 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:45,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2508 Valid, 981 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 16:21:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29085 states. [2021-11-22 16:21:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29085 to 21329. [2021-11-22 16:21:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21329 states, 21328 states have (on average 1.315078769692423) internal successors, (28048), 21328 states have internal predecessors, (28048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21329 states to 21329 states and 28048 transitions. [2021-11-22 16:21:46,915 INFO L78 Accepts]: Start accepts. Automaton has 21329 states and 28048 transitions. Word has length 81 [2021-11-22 16:21:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:46,916 INFO L470 AbstractCegarLoop]: Abstraction has 21329 states and 28048 transitions. [2021-11-22 16:21:46,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.214285714285715) internal successors, (227), 14 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 21329 states and 28048 transitions. [2021-11-22 16:21:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-22 16:21:46,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:46,918 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:46,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:21:47,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 16:21:47,145 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:21:47,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash -326375627, now seen corresponding path program 1 times [2021-11-22 16:21:47,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:47,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313315135] [2021-11-22 16:21:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:47,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:47,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:47,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313315135] [2021-11-22 16:21:47,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313315135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:47,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98548175] [2021-11-22 16:21:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:47,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:47,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:47,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:47,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:21:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:47,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 16:21:47,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:48,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:21:49,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98548175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:49,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:49,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-11-22 16:21:49,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209192540] [2021-11-22 16:21:49,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:49,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 16:21:49,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:49,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 16:21:49,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-22 16:21:49,201 INFO L87 Difference]: Start difference. First operand 21329 states and 28048 transitions. Second operand has 21 states, 21 states have (on average 8.476190476190476) internal successors, (178), 20 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:56,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:56,813 INFO L93 Difference]: Finished difference Result 111689 states and 145951 transitions. [2021-11-22 16:21:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 16:21:56,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.476190476190476) internal successors, (178), 20 states have internal predecessors, (178), 0 states have call successors, (0), 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 82 [2021-11-22 16:21:56,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:56,959 INFO L225 Difference]: With dead ends: 111689 [2021-11-22 16:21:56,960 INFO L226 Difference]: Without dead ends: 93075 [2021-11-22 16:21:57,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=434, Invalid=1288, Unknown=0, NotChecked=0, Total=1722 [2021-11-22 16:21:57,006 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 1944 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1944 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:57,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1944 Valid, 1221 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:21:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93075 states. [2021-11-22 16:22:00,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93075 to 49443. [2021-11-22 16:22:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49443 states, 49442 states have (on average 1.3073298005744105) internal successors, (64637), 49442 states have internal predecessors, (64637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:01,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49443 states to 49443 states and 64637 transitions. [2021-11-22 16:22:01,149 INFO L78 Accepts]: Start accepts. Automaton has 49443 states and 64637 transitions. Word has length 82 [2021-11-22 16:22:01,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:22:01,150 INFO L470 AbstractCegarLoop]: Abstraction has 49443 states and 64637 transitions. [2021-11-22 16:22:01,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.476190476190476) internal successors, (178), 20 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:22:01,150 INFO L276 IsEmpty]: Start isEmpty. Operand 49443 states and 64637 transitions. [2021-11-22 16:22:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-22 16:22:01,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:22:01,154 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:22:01,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:22:01,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 16:22:01,369 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:22:01,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:22:01,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1216708857, now seen corresponding path program 1 times [2021-11-22 16:22:01,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:22:01,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286874273] [2021-11-22 16:22:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:01,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:22:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:22:01,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:22:01,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286874273] [2021-11-22 16:22:01,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286874273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:22:01,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478299632] [2021-11-22 16:22:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:22:01,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:22:01,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:22:01,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:22:01,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b38e1b85-42ef-4fbe-8c3a-2a0655a7afa5/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:22:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:22:01,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 16:22:01,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:22:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:22:02,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:22:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:22:03,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478299632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:22:03,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:22:03,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-11-22 16:22:03,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246106498] [2021-11-22 16:22:03,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:22:03,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 16:22:03,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:22:03,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 16:22:03,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-11-22 16:22:03,597 INFO L87 Difference]: Start difference. First operand 49443 states and 64637 transitions. Second operand has 25 states, 25 states have (on average 9.24) internal successors, (231), 24 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)