./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label33.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label33.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 18ad5ec6bc1db1d6d896db79319bb0ca45f8aff62ac630628a891f63c8426bb4 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:31:41,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:31:41,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:31:41,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:31:41,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:31:41,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:31:41,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:31:41,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:31:41,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:31:41,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:31:41,816 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:31:41,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:31:41,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:31:41,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:31:41,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:31:41,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:31:41,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:31:41,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:31:41,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:31:41,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:31:41,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:31:41,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:31:41,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:31:41,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:31:41,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:31:41,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:31:41,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:31:41,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:31:41,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:31:41,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:31:41,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:31:41,840 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:31:41,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:31:41,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:31:41,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:31:41,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:31:41,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:31:41,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:31:41,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:31:41,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:31:41,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:31:41,846 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:31:41,876 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:31:41,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:31:41,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:31:41,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:31:41,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:31:41,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:31:41,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:31:41,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:31:41,879 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:31:41,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:31:41,880 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:31:41,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:31:41,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:31:41,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:31:41,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:31:41,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:31:41,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:31:41,881 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:31:41,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:31:41,881 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:31:41,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:31:41,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:31:41,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:31:41,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:31:41,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:31:41,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:31:41,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:31:41,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:31:41,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:31:41,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:31:41,883 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:31:41,883 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:31:41,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:31:41,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:31:41,884 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18ad5ec6bc1db1d6d896db79319bb0ca45f8aff62ac630628a891f63c8426bb4 [2021-12-17 04:31:42,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:31:42,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:31:42,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:31:42,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:31:42,083 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:31:42,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label33.c [2021-12-17 04:31:42,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67666ba0a/32d7f9cc1ab046b3833d5599689b7908/FLAG801f33b9a [2021-12-17 04:31:42,680 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:31:42,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label33.c [2021-12-17 04:31:42,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67666ba0a/32d7f9cc1ab046b3833d5599689b7908/FLAG801f33b9a [2021-12-17 04:31:43,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67666ba0a/32d7f9cc1ab046b3833d5599689b7908 [2021-12-17 04:31:43,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:31:43,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:31:43,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:31:43,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:31:43,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:31:43,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:31:43" (1/1) ... [2021-12-17 04:31:43,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eff44e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:43, skipping insertion in model container [2021-12-17 04:31:43,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:31:43" (1/1) ... [2021-12-17 04:31:43,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:31:43,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:31:43,517 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label33.c[6146,6159] [2021-12-17 04:31:44,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:31:44,058 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:31:44,080 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label33.c[6146,6159] [2021-12-17 04:31:44,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:31:44,377 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:31:44,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:44 WrapperNode [2021-12-17 04:31:44,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:31:44,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:31:44,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:31:44,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:31:44,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:44" (1/1) ... [2021-12-17 04:31:44,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:44" (1/1) ... [2021-12-17 04:31:44,664 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-17 04:31:44,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:31:44,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:31:44,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:31:44,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:31:44,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:44" (1/1) ... [2021-12-17 04:31:44,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:44" (1/1) ... [2021-12-17 04:31:44,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:44" (1/1) ... [2021-12-17 04:31:44,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:44" (1/1) ... [2021-12-17 04:31:44,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:44" (1/1) ... [2021-12-17 04:31:44,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:44" (1/1) ... [2021-12-17 04:31:44,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:44" (1/1) ... [2021-12-17 04:31:45,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:31:45,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:31:45,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:31:45,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:31:45,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:44" (1/1) ... [2021-12-17 04:31:45,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:31:45,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:31:45,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 04:31:45,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 04:31:45,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:31:45,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:31:45,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:31:45,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:31:45,120 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:31:45,121 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:31:47,621 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:31:47,638 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:31:47,638 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:31:47,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:31:47 BoogieIcfgContainer [2021-12-17 04:31:47,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:31:47,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:31:47,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:31:47,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:31:47,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:31:43" (1/3) ... [2021-12-17 04:31:47,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc1e87a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:31:47, skipping insertion in model container [2021-12-17 04:31:47,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:31:44" (2/3) ... [2021-12-17 04:31:47,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc1e87a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:31:47, skipping insertion in model container [2021-12-17 04:31:47,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:31:47" (3/3) ... [2021-12-17 04:31:47,646 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label33.c [2021-12-17 04:31:47,650 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:31:47,650 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:31:47,692 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:31:47,698 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 [2021-12-17 04:31:47,698 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:31:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:47,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 04:31:47,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:47,733 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] [2021-12-17 04:31:47,734 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:47,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:47,737 INFO L85 PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times [2021-12-17 04:31:47,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:47,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262133120] [2021-12-17 04:31:47,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:47,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:31:47,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:47,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262133120] [2021-12-17 04:31:47,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262133120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:47,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:47,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:31:47,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069914784] [2021-12-17 04:31:47,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:47,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:47,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:47,944 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:50,872 INFO L93 Difference]: Finished difference Result 2404 states and 4645 transitions. [2021-12-17 04:31:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:50,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-17 04:31:50,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:50,893 INFO L225 Difference]: With dead ends: 2404 [2021-12-17 04:31:50,894 INFO L226 Difference]: Without dead ends: 1506 [2021-12-17 04:31:50,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:50,902 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 771 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:50,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 525 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:31:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-17 04:31:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-17 04:31:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6066445182724252) internal successors, (2418), 1505 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2418 transitions. [2021-12-17 04:31:50,988 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2418 transitions. Word has length 49 [2021-12-17 04:31:50,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:50,989 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2418 transitions. [2021-12-17 04:31:50,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:50,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2418 transitions. [2021-12-17 04:31:50,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-17 04:31:50,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:50,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:31:50,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:31:50,996 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1495298219, now seen corresponding path program 1 times [2021-12-17 04:31:50,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:50,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32607570] [2021-12-17 04:31:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:50,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:31:51,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:51,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32607570] [2021-12-17 04:31:51,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32607570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:51,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:51,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:51,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333722002] [2021-12-17 04:31:51,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:51,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:31:51,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:51,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:31:51,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:31:51,137 INFO L87 Difference]: Start difference. First operand 1506 states and 2418 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 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) [2021-12-17 04:31:53,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:53,613 INFO L93 Difference]: Finished difference Result 3771 states and 5823 transitions. [2021-12-17 04:31:53,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 04:31:53,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 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) Word has length 124 [2021-12-17 04:31:53,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:53,620 INFO L225 Difference]: With dead ends: 3771 [2021-12-17 04:31:53,620 INFO L226 Difference]: Without dead ends: 2267 [2021-12-17 04:31:53,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:31:53,627 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1361 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:53,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1645 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:31:53,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-12-17 04:31:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2257. [2021-12-17 04:31:53,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4073581560283688) internal successors, (3175), 2256 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3175 transitions. [2021-12-17 04:31:53,661 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3175 transitions. Word has length 124 [2021-12-17 04:31:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:53,662 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3175 transitions. [2021-12-17 04:31:53,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 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) [2021-12-17 04:31:53,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3175 transitions. [2021-12-17 04:31:53,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 04:31:53,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:53,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:31:53,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:31:53,670 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2115888794, now seen corresponding path program 1 times [2021-12-17 04:31:53,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:53,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446671856] [2021-12-17 04:31:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:53,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:31:53,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:53,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446671856] [2021-12-17 04:31:53,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446671856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:53,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:53,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:53,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611278731] [2021-12-17 04:31:53,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:53,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:53,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:53,796 INFO L87 Difference]: Start difference. First operand 2257 states and 3175 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:56,361 INFO L93 Difference]: Finished difference Result 5263 states and 8006 transitions. [2021-12-17 04:31:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:56,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-12-17 04:31:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:56,373 INFO L225 Difference]: With dead ends: 5263 [2021-12-17 04:31:56,373 INFO L226 Difference]: Without dead ends: 3759 [2021-12-17 04:31:56,375 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 [2021-12-17 04:31:56,381 INFO L933 BasicCegarLoop]: 1145 mSDtfsCounter, 714 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2627 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 3065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:56,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 1153 Invalid, 3065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2627 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:31:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-12-17 04:31:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2021-12-17 04:31:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.4169771154869613) internal successors, (5325), 3758 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5325 transitions. [2021-12-17 04:31:56,435 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5325 transitions. Word has length 190 [2021-12-17 04:31:56,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:56,437 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5325 transitions. [2021-12-17 04:31:56,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5325 transitions. [2021-12-17 04:31:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-17 04:31:56,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:56,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:31:56,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:31:56,439 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:56,440 INFO L85 PathProgramCache]: Analyzing trace with hash 323727332, now seen corresponding path program 1 times [2021-12-17 04:31:56,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:56,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365102083] [2021-12-17 04:31:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:56,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:31:56,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:56,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365102083] [2021-12-17 04:31:56,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365102083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:56,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:56,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:56,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468926056] [2021-12-17 04:31:56,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:56,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:31:56,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:56,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:31:56,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:31:56,569 INFO L87 Difference]: Start difference. First operand 3759 states and 5325 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:31:58,972 INFO L93 Difference]: Finished difference Result 8267 states and 12306 transitions. [2021-12-17 04:31:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:31:58,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2021-12-17 04:31:58,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:31:58,995 INFO L225 Difference]: With dead ends: 8267 [2021-12-17 04:31:58,996 INFO L226 Difference]: Without dead ends: 5261 [2021-12-17 04:31:58,999 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 [2021-12-17 04:31:59,004 INFO L933 BasicCegarLoop]: 1162 mSDtfsCounter, 741 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2417 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 3069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:31:59,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 1170 Invalid, 3069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2417 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:31:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-12-17 04:31:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2021-12-17 04:31:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.423384030418251) internal successors, (7487), 5260 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7487 transitions. [2021-12-17 04:31:59,072 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7487 transitions. Word has length 194 [2021-12-17 04:31:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:31:59,073 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 7487 transitions. [2021-12-17 04:31:59,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:31:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7487 transitions. [2021-12-17 04:31:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-17 04:31:59,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:31:59,075 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:31:59,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:31:59,075 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:31:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:31:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash 394848823, now seen corresponding path program 1 times [2021-12-17 04:31:59,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:31:59,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973093435] [2021-12-17 04:31:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:31:59,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:31:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:31:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 04:31:59,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:31:59,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973093435] [2021-12-17 04:31:59,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973093435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:31:59,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:31:59,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:31:59,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050336210] [2021-12-17 04:31:59,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:31:59,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:31:59,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:31:59,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:31:59,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:31:59,186 INFO L87 Difference]: Start difference. First operand 5261 states and 7487 transitions. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:01,834 INFO L93 Difference]: Finished difference Result 12059 states and 17093 transitions. [2021-12-17 04:32:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:32:01,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 203 [2021-12-17 04:32:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:01,857 INFO L225 Difference]: With dead ends: 12059 [2021-12-17 04:32:01,858 INFO L226 Difference]: Without dead ends: 7514 [2021-12-17 04:32:01,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:32:01,865 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3797 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 3797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:01,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 706 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 3797 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:32:01,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7514 states. [2021-12-17 04:32:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7514 to 7514. [2021-12-17 04:32:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7514 states, 7513 states have (on average 1.307467057101025) internal successors, (9823), 7513 states have internal predecessors, (9823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 9823 transitions. [2021-12-17 04:32:01,957 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 9823 transitions. Word has length 203 [2021-12-17 04:32:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:01,958 INFO L470 AbstractCegarLoop]: Abstraction has 7514 states and 9823 transitions. [2021-12-17 04:32:01,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 9823 transitions. [2021-12-17 04:32:01,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-17 04:32:01,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:01,963 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:32:01,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:32:01,964 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:01,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:01,964 INFO L85 PathProgramCache]: Analyzing trace with hash -819857147, now seen corresponding path program 1 times [2021-12-17 04:32:01,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:01,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175793177] [2021-12-17 04:32:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:01,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-17 04:32:02,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:02,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175793177] [2021-12-17 04:32:02,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175793177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:02,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:32:02,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:32:02,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642880892] [2021-12-17 04:32:02,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:02,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:32:02,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:02,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:32:02,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:32:02,064 INFO L87 Difference]: Start difference. First operand 7514 states and 9823 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:04,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:04,227 INFO L93 Difference]: Finished difference Result 20283 states and 27139 transitions. [2021-12-17 04:32:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:32:04,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 259 [2021-12-17 04:32:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:04,262 INFO L225 Difference]: With dead ends: 20283 [2021-12-17 04:32:04,262 INFO L226 Difference]: Without dead ends: 13522 [2021-12-17 04:32:04,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:32:04,271 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 679 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:04,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 456 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:32:04,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13522 states. [2021-12-17 04:32:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13522 to 12771. [2021-12-17 04:32:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12771 states, 12770 states have (on average 1.2398590446358653) internal successors, (15833), 12770 states have internal predecessors, (15833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12771 states to 12771 states and 15833 transitions. [2021-12-17 04:32:04,419 INFO L78 Accepts]: Start accepts. Automaton has 12771 states and 15833 transitions. Word has length 259 [2021-12-17 04:32:04,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:04,419 INFO L470 AbstractCegarLoop]: Abstraction has 12771 states and 15833 transitions. [2021-12-17 04:32:04,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 12771 states and 15833 transitions. [2021-12-17 04:32:04,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-12-17 04:32:04,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:04,422 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:32:04,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:32:04,423 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:04,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:04,423 INFO L85 PathProgramCache]: Analyzing trace with hash -444405826, now seen corresponding path program 1 times [2021-12-17 04:32:04,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:04,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124531504] [2021-12-17 04:32:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:04,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 134 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:32:04,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:04,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124531504] [2021-12-17 04:32:04,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124531504] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:32:04,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492970501] [2021-12-17 04:32:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:04,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:32:04,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:32:04,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:32:04,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:32:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:04,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:32:04,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:32:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:32:05,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:32:05,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492970501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:05,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:32:05,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 04:32:05,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468902384] [2021-12-17 04:32:05,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:05,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:32:05,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:05,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:32:05,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:32:05,029 INFO L87 Difference]: Start difference. First operand 12771 states and 15833 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:07,303 INFO L93 Difference]: Finished difference Result 32299 states and 40960 transitions. [2021-12-17 04:32:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:32:07,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 277 [2021-12-17 04:32:07,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:07,334 INFO L225 Difference]: With dead ends: 32299 [2021-12-17 04:32:07,335 INFO L226 Difference]: Without dead ends: 20281 [2021-12-17 04:32:07,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:32:07,348 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 907 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:07,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 309 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:32:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20281 states. [2021-12-17 04:32:07,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20281 to 20281. [2021-12-17 04:32:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20281 states, 20280 states have (on average 1.2012820512820512) internal successors, (24362), 20280 states have internal predecessors, (24362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20281 states to 20281 states and 24362 transitions. [2021-12-17 04:32:07,666 INFO L78 Accepts]: Start accepts. Automaton has 20281 states and 24362 transitions. Word has length 277 [2021-12-17 04:32:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:07,667 INFO L470 AbstractCegarLoop]: Abstraction has 20281 states and 24362 transitions. [2021-12-17 04:32:07,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 20281 states and 24362 transitions. [2021-12-17 04:32:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-17 04:32:07,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:07,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:32:07,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 04:32:07,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:32:07,884 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:07,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:07,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1628655601, now seen corresponding path program 1 times [2021-12-17 04:32:07,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:07,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243052893] [2021-12-17 04:32:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:07,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-17 04:32:08,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:08,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243052893] [2021-12-17 04:32:08,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243052893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:08,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:32:08,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:32:08,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861152674] [2021-12-17 04:32:08,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:08,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:32:08,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:08,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:32:08,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:32:08,078 INFO L87 Difference]: Start difference. First operand 20281 states and 24362 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:10,255 INFO L93 Difference]: Finished difference Result 48070 states and 57083 transitions. [2021-12-17 04:32:10,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:32:10,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 326 [2021-12-17 04:32:10,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:10,292 INFO L225 Difference]: With dead ends: 48070 [2021-12-17 04:32:10,292 INFO L226 Difference]: Without dead ends: 28542 [2021-12-17 04:32:10,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:32:10,304 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 785 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:10,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 205 Invalid, 2754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 04:32:10,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28542 states. [2021-12-17 04:32:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28542 to 25538. [2021-12-17 04:32:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25538 states, 25537 states have (on average 1.167952382817089) internal successors, (29826), 25537 states have internal predecessors, (29826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25538 states to 25538 states and 29826 transitions. [2021-12-17 04:32:10,568 INFO L78 Accepts]: Start accepts. Automaton has 25538 states and 29826 transitions. Word has length 326 [2021-12-17 04:32:10,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:10,568 INFO L470 AbstractCegarLoop]: Abstraction has 25538 states and 29826 transitions. [2021-12-17 04:32:10,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 25538 states and 29826 transitions. [2021-12-17 04:32:10,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-17 04:32:10,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:10,573 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:32:10,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:32:10,573 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:10,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:10,574 INFO L85 PathProgramCache]: Analyzing trace with hash -773907428, now seen corresponding path program 1 times [2021-12-17 04:32:10,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:10,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245206183] [2021-12-17 04:32:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:10,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 04:32:10,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:10,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245206183] [2021-12-17 04:32:10,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245206183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:10,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:32:10,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:32:10,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617583886] [2021-12-17 04:32:10,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:10,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:32:10,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:10,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:32:10,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:32:10,655 INFO L87 Difference]: Start difference. First operand 25538 states and 29826 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:13,022 INFO L93 Difference]: Finished difference Result 60086 states and 71536 transitions. [2021-12-17 04:32:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:32:13,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 348 [2021-12-17 04:32:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:13,062 INFO L225 Difference]: With dead ends: 60086 [2021-12-17 04:32:13,063 INFO L226 Difference]: Without dead ends: 35301 [2021-12-17 04:32:13,083 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 [2021-12-17 04:32:13,083 INFO L933 BasicCegarLoop]: 1208 mSDtfsCounter, 704 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:13,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1216 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 04:32:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35301 states. [2021-12-17 04:32:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35301 to 35301. [2021-12-17 04:32:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35301 states, 35300 states have (on average 1.1493201133144475) internal successors, (40571), 35300 states have internal predecessors, (40571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:13,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35301 states to 35301 states and 40571 transitions. [2021-12-17 04:32:13,512 INFO L78 Accepts]: Start accepts. Automaton has 35301 states and 40571 transitions. Word has length 348 [2021-12-17 04:32:13,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:13,512 INFO L470 AbstractCegarLoop]: Abstraction has 35301 states and 40571 transitions. [2021-12-17 04:32:13,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 35301 states and 40571 transitions. [2021-12-17 04:32:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-12-17 04:32:13,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:13,520 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:32:13,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:32:13,520 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:13,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:13,521 INFO L85 PathProgramCache]: Analyzing trace with hash 108402636, now seen corresponding path program 1 times [2021-12-17 04:32:13,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:13,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205020880] [2021-12-17 04:32:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:13,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-17 04:32:13,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:13,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205020880] [2021-12-17 04:32:13,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205020880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:13,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:32:13,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:32:13,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385899098] [2021-12-17 04:32:13,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:13,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:32:13,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:13,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:32:13,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:32:13,621 INFO L87 Difference]: Start difference. First operand 35301 states and 40571 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:16,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:16,136 INFO L93 Difference]: Finished difference Result 96885 states and 110926 transitions. [2021-12-17 04:32:16,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:32:16,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 380 [2021-12-17 04:32:16,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:16,196 INFO L225 Difference]: With dead ends: 96885 [2021-12-17 04:32:16,197 INFO L226 Difference]: Without dead ends: 58582 [2021-12-17 04:32:16,218 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 [2021-12-17 04:32:16,219 INFO L933 BasicCegarLoop]: 1307 mSDtfsCounter, 744 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:16,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 1315 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:32:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58582 states. [2021-12-17 04:32:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58582 to 55578. [2021-12-17 04:32:16,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55578 states, 55577 states have (on average 1.1107652446155785) internal successors, (61733), 55577 states have internal predecessors, (61733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55578 states to 55578 states and 61733 transitions. [2021-12-17 04:32:16,794 INFO L78 Accepts]: Start accepts. Automaton has 55578 states and 61733 transitions. Word has length 380 [2021-12-17 04:32:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:16,794 INFO L470 AbstractCegarLoop]: Abstraction has 55578 states and 61733 transitions. [2021-12-17 04:32:16,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 55578 states and 61733 transitions. [2021-12-17 04:32:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-12-17 04:32:16,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:16,801 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:32:16,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:32:16,802 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:16,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:16,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1333574750, now seen corresponding path program 1 times [2021-12-17 04:32:16,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:16,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319881051] [2021-12-17 04:32:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:16,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-17 04:32:16,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:16,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319881051] [2021-12-17 04:32:16,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319881051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:16,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:32:16,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:32:16,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004264080] [2021-12-17 04:32:16,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:16,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:32:16,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:16,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:32:16,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:32:16,907 INFO L87 Difference]: Start difference. First operand 55578 states and 61733 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:19,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:19,500 INFO L93 Difference]: Finished difference Result 132182 states and 147482 transitions. [2021-12-17 04:32:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:32:19,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-12-17 04:32:19,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:19,580 INFO L225 Difference]: With dead ends: 132182 [2021-12-17 04:32:19,580 INFO L226 Difference]: Without dead ends: 77357 [2021-12-17 04:32:19,613 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 [2021-12-17 04:32:19,614 INFO L933 BasicCegarLoop]: 1248 mSDtfsCounter, 710 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:19,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 1256 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:32:19,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77357 states. [2021-12-17 04:32:20,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77357 to 72851. [2021-12-17 04:32:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72851 states, 72850 states have (on average 1.0842141386410433) internal successors, (78985), 72850 states have internal predecessors, (78985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72851 states to 72851 states and 78985 transitions. [2021-12-17 04:32:20,569 INFO L78 Accepts]: Start accepts. Automaton has 72851 states and 78985 transitions. Word has length 443 [2021-12-17 04:32:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:20,570 INFO L470 AbstractCegarLoop]: Abstraction has 72851 states and 78985 transitions. [2021-12-17 04:32:20,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 72851 states and 78985 transitions. [2021-12-17 04:32:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-12-17 04:32:20,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:20,580 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:32:20,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:32:20,581 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:20,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1371657392, now seen corresponding path program 1 times [2021-12-17 04:32:20,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:20,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883188079] [2021-12-17 04:32:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:20,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 423 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:32:20,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:20,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883188079] [2021-12-17 04:32:20,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883188079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:32:20,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76267479] [2021-12-17 04:32:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:20,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:32:20,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:32:20,774 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:32:20,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 04:32:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:20,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 04:32:20,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:32:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-17 04:32:21,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:32:21,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76267479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:21,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:32:21,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-17 04:32:21,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437085922] [2021-12-17 04:32:21,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:21,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:32:21,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:21,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:32:21,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:32:21,673 INFO L87 Difference]: Start difference. First operand 72851 states and 78985 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:26,085 INFO L93 Difference]: Finished difference Result 207284 states and 225594 transitions. [2021-12-17 04:32:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:32:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 484 [2021-12-17 04:32:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:26,239 INFO L225 Difference]: With dead ends: 207284 [2021-12-17 04:32:26,239 INFO L226 Difference]: Without dead ends: 135186 [2021-12-17 04:32:26,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:32:26,274 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1761 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4879 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1761 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 4879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:26,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1761 Valid, 30 Invalid, 5388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 4879 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-17 04:32:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135186 states. [2021-12-17 04:32:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135186 to 135184. [2021-12-17 04:32:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135184 states, 135183 states have (on average 1.0817262525613427) internal successors, (146231), 135183 states have internal predecessors, (146231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135184 states to 135184 states and 146231 transitions. [2021-12-17 04:32:27,831 INFO L78 Accepts]: Start accepts. Automaton has 135184 states and 146231 transitions. Word has length 484 [2021-12-17 04:32:27,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:27,843 INFO L470 AbstractCegarLoop]: Abstraction has 135184 states and 146231 transitions. [2021-12-17 04:32:27,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 135184 states and 146231 transitions. [2021-12-17 04:32:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2021-12-17 04:32:27,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:27,869 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:32:27,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 04:32:28,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 04:32:28,072 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:28,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1090795918, now seen corresponding path program 1 times [2021-12-17 04:32:28,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:28,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366789566] [2021-12-17 04:32:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:28,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 865 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-12-17 04:32:28,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:28,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366789566] [2021-12-17 04:32:28,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366789566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:28,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:32:28,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:32:28,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496882554] [2021-12-17 04:32:28,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:28,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:32:28,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:32:28,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:32:28,459 INFO L87 Difference]: Start difference. First operand 135184 states and 146231 transitions. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:31,532 INFO L93 Difference]: Finished difference Result 325940 states and 354313 transitions. [2021-12-17 04:32:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:32:31,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 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 621 [2021-12-17 04:32:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:31,912 INFO L225 Difference]: With dead ends: 325940 [2021-12-17 04:32:31,913 INFO L226 Difference]: Without dead ends: 191509 [2021-12-17 04:32:31,961 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 [2021-12-17 04:32:31,962 INFO L933 BasicCegarLoop]: 1294 mSDtfsCounter, 690 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 2855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:31,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 1301 Invalid, 2855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:32:32,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191509 states. [2021-12-17 04:32:33,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191509 to 180244. [2021-12-17 04:32:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180244 states, 180243 states have (on average 1.0729737077168044) internal successors, (193396), 180243 states have internal predecessors, (193396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180244 states to 180244 states and 193396 transitions. [2021-12-17 04:32:34,071 INFO L78 Accepts]: Start accepts. Automaton has 180244 states and 193396 transitions. Word has length 621 [2021-12-17 04:32:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:34,072 INFO L470 AbstractCegarLoop]: Abstraction has 180244 states and 193396 transitions. [2021-12-17 04:32:34,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 180244 states and 193396 transitions. [2021-12-17 04:32:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2021-12-17 04:32:34,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:34,104 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:32:34,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:32:34,104 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:34,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:34,105 INFO L85 PathProgramCache]: Analyzing trace with hash 142520812, now seen corresponding path program 1 times [2021-12-17 04:32:34,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:34,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437326868] [2021-12-17 04:32:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:34,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 942 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-12-17 04:32:34,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:34,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437326868] [2021-12-17 04:32:34,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437326868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:34,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:32:34,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:32:34,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457537969] [2021-12-17 04:32:34,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:34,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:32:34,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:34,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:32:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:32:34,425 INFO L87 Difference]: Start difference. First operand 180244 states and 193396 transitions. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:37,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:37,574 INFO L93 Difference]: Finished difference Result 384518 states and 414580 transitions. [2021-12-17 04:32:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:32:37,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 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 665 [2021-12-17 04:32:37,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:37,841 INFO L225 Difference]: With dead ends: 384518 [2021-12-17 04:32:37,841 INFO L226 Difference]: Without dead ends: 205027 [2021-12-17 04:32:37,924 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 [2021-12-17 04:32:37,924 INFO L933 BasicCegarLoop]: 1262 mSDtfsCounter, 669 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2226 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 2226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:37,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1270 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 2226 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 04:32:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205027 states. [2021-12-17 04:32:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205027 to 202023. [2021-12-17 04:32:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202023 states, 202022 states have (on average 1.0658789636772232) internal successors, (215331), 202022 states have internal predecessors, (215331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202023 states to 202023 states and 215331 transitions. [2021-12-17 04:32:40,401 INFO L78 Accepts]: Start accepts. Automaton has 202023 states and 215331 transitions. Word has length 665 [2021-12-17 04:32:40,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:40,402 INFO L470 AbstractCegarLoop]: Abstraction has 202023 states and 215331 transitions. [2021-12-17 04:32:40,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:40,402 INFO L276 IsEmpty]: Start isEmpty. Operand 202023 states and 215331 transitions. [2021-12-17 04:32:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2021-12-17 04:32:40,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:40,427 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:32:40,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:32:40,427 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:40,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:40,428 INFO L85 PathProgramCache]: Analyzing trace with hash 647053304, now seen corresponding path program 1 times [2021-12-17 04:32:40,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:40,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359502441] [2021-12-17 04:32:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:40,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 1105 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-17 04:32:40,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:40,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359502441] [2021-12-17 04:32:40,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359502441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:40,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:32:40,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:32:40,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981002520] [2021-12-17 04:32:40,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:40,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:32:40,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:32:40,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:32:40,568 INFO L87 Difference]: Start difference. First operand 202023 states and 215331 transitions. Second operand has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:44,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:44,664 INFO L93 Difference]: Finished difference Result 412305 states and 439222 transitions. [2021-12-17 04:32:44,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:32:44,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 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 681 [2021-12-17 04:32:44,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:44,959 INFO L225 Difference]: With dead ends: 412305 [2021-12-17 04:32:44,960 INFO L226 Difference]: Without dead ends: 211035 [2021-12-17 04:32:45,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:32:45,073 INFO L933 BasicCegarLoop]: 1293 mSDtfsCounter, 1320 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3966 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 4236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 3966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:45,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1320 Valid, 1306 Invalid, 4236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 3966 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 04:32:45,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211035 states. [2021-12-17 04:32:47,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211035 to 211035. [2021-12-17 04:32:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211035 states, 211034 states have (on average 1.0613597808883877) internal successors, (223983), 211034 states have internal predecessors, (223983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211035 states to 211035 states and 223983 transitions. [2021-12-17 04:32:47,538 INFO L78 Accepts]: Start accepts. Automaton has 211035 states and 223983 transitions. Word has length 681 [2021-12-17 04:32:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:47,538 INFO L470 AbstractCegarLoop]: Abstraction has 211035 states and 223983 transitions. [2021-12-17 04:32:47,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:47,538 INFO L276 IsEmpty]: Start isEmpty. Operand 211035 states and 223983 transitions. [2021-12-17 04:32:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 685 [2021-12-17 04:32:47,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:47,564 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:32:47,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:32:47,564 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:47,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:47,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1111259972, now seen corresponding path program 1 times [2021-12-17 04:32:47,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:47,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204036305] [2021-12-17 04:32:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:47,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 953 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-12-17 04:32:48,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:48,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204036305] [2021-12-17 04:32:48,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204036305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:48,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:32:48,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:32:48,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529206635] [2021-12-17 04:32:48,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:48,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:32:48,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:48,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:32:48,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:32:48,090 INFO L87 Difference]: Start difference. First operand 211035 states and 223983 transitions. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:51,615 INFO L93 Difference]: Finished difference Result 435586 states and 461911 transitions. [2021-12-17 04:32:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:32:51,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 684 [2021-12-17 04:32:51,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:51,898 INFO L225 Difference]: With dead ends: 435586 [2021-12-17 04:32:51,898 INFO L226 Difference]: Without dead ends: 225304 [2021-12-17 04:32:52,001 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 [2021-12-17 04:32:52,002 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 683 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:52,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 226 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:32:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225304 states. [2021-12-17 04:32:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225304 to 212537. [2021-12-17 04:32:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212537 states, 212536 states have (on average 1.0592417284601197) internal successors, (225127), 212536 states have internal predecessors, (225127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212537 states to 212537 states and 225127 transitions. [2021-12-17 04:32:54,747 INFO L78 Accepts]: Start accepts. Automaton has 212537 states and 225127 transitions. Word has length 684 [2021-12-17 04:32:54,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:32:54,747 INFO L470 AbstractCegarLoop]: Abstraction has 212537 states and 225127 transitions. [2021-12-17 04:32:54,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:54,748 INFO L276 IsEmpty]: Start isEmpty. Operand 212537 states and 225127 transitions. [2021-12-17 04:32:54,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 739 [2021-12-17 04:32:54,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:32:54,781 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:32:54,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 04:32:54,781 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:32:54,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:32:54,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1049289597, now seen corresponding path program 1 times [2021-12-17 04:32:54,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:32:54,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992320190] [2021-12-17 04:32:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:32:54,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:32:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:32:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1164 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2021-12-17 04:32:54,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:32:54,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992320190] [2021-12-17 04:32:54,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992320190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:32:54,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:32:54,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:32:54,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349512716] [2021-12-17 04:32:54,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:32:54,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:32:54,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:32:54,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:32:54,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:32:54,959 INFO L87 Difference]: Start difference. First operand 212537 states and 225127 transitions. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:32:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:32:58,775 INFO L93 Difference]: Finished difference Result 437839 states and 463433 transitions. [2021-12-17 04:32:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:32:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 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 738 [2021-12-17 04:32:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:32:59,133 INFO L225 Difference]: With dead ends: 437839 [2021-12-17 04:32:59,133 INFO L226 Difference]: Without dead ends: 226055 [2021-12-17 04:32:59,224 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 [2021-12-17 04:32:59,225 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 663 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:32:59,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 256 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 04:32:59,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226055 states. [2021-12-17 04:33:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226055 to 213288. [2021-12-17 04:33:01,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213288 states, 213287 states have (on average 1.0574577916141161) internal successors, (225542), 213287 states have internal predecessors, (225542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213288 states to 213288 states and 225542 transitions. [2021-12-17 04:33:01,789 INFO L78 Accepts]: Start accepts. Automaton has 213288 states and 225542 transitions. Word has length 738 [2021-12-17 04:33:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:33:01,790 INFO L470 AbstractCegarLoop]: Abstraction has 213288 states and 225542 transitions. [2021-12-17 04:33:01,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:33:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 213288 states and 225542 transitions. [2021-12-17 04:33:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 744 [2021-12-17 04:33:01,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:33:01,820 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:33:01,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 04:33:01,820 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:33:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:33:01,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1493585643, now seen corresponding path program 1 times [2021-12-17 04:33:01,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:33:01,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407107912] [2021-12-17 04:33:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:33:01,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:33:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:33:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1322 backedges. 733 proven. 0 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2021-12-17 04:33:02,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:33:02,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407107912] [2021-12-17 04:33:02,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407107912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:33:02,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:33:02,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:33:02,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173103859] [2021-12-17 04:33:02,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:33:02,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:33:02,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:33:02,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:33:02,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:33:02,032 INFO L87 Difference]: Start difference. First operand 213288 states and 225542 transitions. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)