./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/systemc/mem_slave_tlm.5.cil.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 067fe51884f92ae3774f211cf9d4291369df85b7690d3eee54cd23a70c2ea301 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:21:43,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:21:43,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:21:43,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:21:43,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:21:43,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:21:43,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:21:43,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:21:43,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:21:43,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:21:43,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:21:43,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:21:43,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:21:43,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:21:43,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:21:43,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:21:43,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:21:43,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:21:43,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:21:43,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:21:43,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:21:43,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:21:43,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:21:43,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:21:43,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:21:43,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:21:43,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:21:43,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:21:43,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:21:43,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:21:43,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:21:43,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:21:43,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:21:43,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:21:43,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:21:43,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:21:43,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:21:43,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:21:43,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:21:43,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:21:43,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:21:43,582 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:21:43,602 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:21:43,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:21:43,603 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:21:43,603 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:21:43,604 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:21:43,604 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:21:43,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:21:43,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:21:43,605 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:21:43,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:21:43,606 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:21:43,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:21:43,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:21:43,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:21:43,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:21:43,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:21:43,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:21:43,607 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:21:43,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:21:43,607 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:21:43,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:21:43,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:21:43,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:21:43,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:21:43,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:21:43,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:21:43,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:21:43,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:21:43,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:21:43,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:21:43,609 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:21:43,609 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:21:43,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:21:43,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:21:43,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 067fe51884f92ae3774f211cf9d4291369df85b7690d3eee54cd23a70c2ea301 [2021-12-21 13:21:43,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:21:43,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:21:43,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:21:43,793 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:21:43,794 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:21:43,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c [2021-12-21 13:21:43,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/250aa53c5/b7a4dd5940f14af2b77c68fd76dfe36e/FLAG07f8d140a [2021-12-21 13:21:44,308 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:21:44,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c [2021-12-21 13:21:44,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/250aa53c5/b7a4dd5940f14af2b77c68fd76dfe36e/FLAG07f8d140a [2021-12-21 13:21:44,637 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/250aa53c5/b7a4dd5940f14af2b77c68fd76dfe36e [2021-12-21 13:21:44,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:21:44,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:21:44,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:21:44,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:21:44,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:21:44,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:21:44" (1/1) ... [2021-12-21 13:21:44,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26140ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44, skipping insertion in model container [2021-12-21 13:21:44,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:21:44" (1/1) ... [2021-12-21 13:21:44,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:21:44,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:21:44,790 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/systemc/mem_slave_tlm.5.cil.c[646,659] [2021-12-21 13:21:44,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:21:44,882 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:21:44,897 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/systemc/mem_slave_tlm.5.cil.c[646,659] [2021-12-21 13:21:44,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:21:44,946 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:21:44,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44 WrapperNode [2021-12-21 13:21:44,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:21:44,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:21:44,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:21:44,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:21:44,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44" (1/1) ... [2021-12-21 13:21:44,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44" (1/1) ... [2021-12-21 13:21:45,000 INFO L137 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 866 [2021-12-21 13:21:45,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:21:45,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:21:45,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:21:45,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:21:45,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44" (1/1) ... [2021-12-21 13:21:45,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44" (1/1) ... [2021-12-21 13:21:45,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44" (1/1) ... [2021-12-21 13:21:45,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44" (1/1) ... [2021-12-21 13:21:45,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44" (1/1) ... [2021-12-21 13:21:45,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44" (1/1) ... [2021-12-21 13:21:45,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44" (1/1) ... [2021-12-21 13:21:45,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:21:45,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:21:45,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:21:45,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:21:45,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44" (1/1) ... [2021-12-21 13:21:45,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:21:45,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:45,140 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) [2021-12-21 13:21:45,144 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 [2021-12-21 13:21:45,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:21:45,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:21:45,197 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-21 13:21:45,197 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-21 13:21:45,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:21:45,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:21:45,269 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:21:45,270 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:21:45,802 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:21:45,808 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:21:45,809 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-12-21 13:21:45,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:21:45 BoogieIcfgContainer [2021-12-21 13:21:45,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:21:45,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:21:45,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:21:45,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:21:45,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:21:44" (1/3) ... [2021-12-21 13:21:45,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1027870a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:21:45, skipping insertion in model container [2021-12-21 13:21:45,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:44" (2/3) ... [2021-12-21 13:21:45,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1027870a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:21:45, skipping insertion in model container [2021-12-21 13:21:45,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:21:45" (3/3) ... [2021-12-21 13:21:45,817 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.5.cil.c [2021-12-21 13:21:45,820 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:21:45,821 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:21:45,853 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:21:45,858 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 [2021-12-21 13:21:45,858 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:21:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 279 states, 271 states have (on average 1.8560885608856088) internal successors, (503), 277 states have internal predecessors, (503), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 13:21:45,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 13:21:45,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:45,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:45,881 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:45,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:45,885 INFO L85 PathProgramCache]: Analyzing trace with hash 193087859, now seen corresponding path program 1 times [2021-12-21 13:21:45,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:45,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681090232] [2021-12-21 13:21:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:45,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:46,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:46,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681090232] [2021-12-21 13:21:46,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681090232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:46,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:46,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:46,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786982645] [2021-12-21 13:21:46,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:46,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:46,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:46,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:46,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:46,057 INFO L87 Difference]: Start difference. First operand has 279 states, 271 states have (on average 1.8560885608856088) internal successors, (503), 277 states have internal predecessors, (503), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:46,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:46,377 INFO L93 Difference]: Finished difference Result 736 states and 1353 transitions. [2021-12-21 13:21:46,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-21 13:21:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:46,387 INFO L225 Difference]: With dead ends: 736 [2021-12-21 13:21:46,387 INFO L226 Difference]: Without dead ends: 454 [2021-12-21 13:21:46,390 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 [2021-12-21 13:21:46,393 INFO L933 BasicCegarLoop]: 483 mSDtfsCounter, 271 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:46,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 797 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:46,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-21 13:21:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 441. [2021-12-21 13:21:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 435 states have (on average 1.6045977011494252) internal successors, (698), 439 states have internal predecessors, (698), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 703 transitions. [2021-12-21 13:21:46,436 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 703 transitions. Word has length 29 [2021-12-21 13:21:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:46,437 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 703 transitions. [2021-12-21 13:21:46,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 703 transitions. [2021-12-21 13:21:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 13:21:46,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:46,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:46,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:21:46,439 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1865699697, now seen corresponding path program 1 times [2021-12-21 13:21:46,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:46,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213693599] [2021-12-21 13:21:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:46,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:46,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:46,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213693599] [2021-12-21 13:21:46,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213693599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:46,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:46,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:46,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558577411] [2021-12-21 13:21:46,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:46,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:46,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:46,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:46,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:46,479 INFO L87 Difference]: Start difference. First operand 441 states and 703 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:46,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:46,571 INFO L93 Difference]: Finished difference Result 1161 states and 1877 transitions. [2021-12-21 13:21:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:46,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-21 13:21:46,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:46,574 INFO L225 Difference]: With dead ends: 1161 [2021-12-21 13:21:46,574 INFO L226 Difference]: Without dead ends: 734 [2021-12-21 13:21:46,579 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 [2021-12-21 13:21:46,580 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 334 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:46,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1040 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-12-21 13:21:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 721. [2021-12-21 13:21:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 715 states have (on average 1.6391608391608392) internal successors, (1172), 719 states have internal predecessors, (1172), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:46,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1177 transitions. [2021-12-21 13:21:46,617 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1177 transitions. Word has length 41 [2021-12-21 13:21:46,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:46,619 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1177 transitions. [2021-12-21 13:21:46,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1177 transitions. [2021-12-21 13:21:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 13:21:46,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:46,624 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] [2021-12-21 13:21:46,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:21:46,625 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:46,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:46,625 INFO L85 PathProgramCache]: Analyzing trace with hash 614817242, now seen corresponding path program 1 times [2021-12-21 13:21:46,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:46,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872033270] [2021-12-21 13:21:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:46,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:46,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:46,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872033270] [2021-12-21 13:21:46,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872033270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:46,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:46,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:46,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738193347] [2021-12-21 13:21:46,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:46,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:46,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:46,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:46,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:46,659 INFO L87 Difference]: Start difference. First operand 721 states and 1177 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:46,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:46,721 INFO L93 Difference]: Finished difference Result 1809 states and 2948 transitions. [2021-12-21 13:21:46,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:46,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-21 13:21:46,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:46,724 INFO L225 Difference]: With dead ends: 1809 [2021-12-21 13:21:46,725 INFO L226 Difference]: Without dead ends: 1113 [2021-12-21 13:21:46,726 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 [2021-12-21 13:21:46,726 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 361 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:46,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 821 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:46,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-12-21 13:21:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1102. [2021-12-21 13:21:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1096 states have (on average 1.6259124087591241) internal successors, (1782), 1100 states have internal predecessors, (1782), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1787 transitions. [2021-12-21 13:21:46,747 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1787 transitions. Word has length 42 [2021-12-21 13:21:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:46,747 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1787 transitions. [2021-12-21 13:21:46,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1787 transitions. [2021-12-21 13:21:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 13:21:46,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:46,749 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 13:21:46,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:21:46,750 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:46,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2063798548, now seen corresponding path program 1 times [2021-12-21 13:21:46,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:46,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054072259] [2021-12-21 13:21:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:46,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:46,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:46,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054072259] [2021-12-21 13:21:46,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054072259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:46,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:46,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:21:46,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051668207] [2021-12-21 13:21:46,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:46,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:21:46,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:21:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:21:46,835 INFO L87 Difference]: Start difference. First operand 1102 states and 1787 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:47,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:47,128 INFO L93 Difference]: Finished difference Result 3042 states and 4911 transitions. [2021-12-21 13:21:47,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:21:47,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-21 13:21:47,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:47,135 INFO L225 Difference]: With dead ends: 3042 [2021-12-21 13:21:47,135 INFO L226 Difference]: Without dead ends: 1965 [2021-12-21 13:21:47,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:21:47,141 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 592 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:47,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [592 Valid, 1606 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-12-21 13:21:47,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1732. [2021-12-21 13:21:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1726 states have (on average 1.6025492468134415) internal successors, (2766), 1730 states have internal predecessors, (2766), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2771 transitions. [2021-12-21 13:21:47,176 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2771 transitions. Word has length 48 [2021-12-21 13:21:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:47,176 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 2771 transitions. [2021-12-21 13:21:47,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2771 transitions. [2021-12-21 13:21:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 13:21:47,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:47,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:47,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:21:47,178 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:47,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1086798560, now seen corresponding path program 1 times [2021-12-21 13:21:47,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:47,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221044588] [2021-12-21 13:21:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:47,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:47,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:47,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221044588] [2021-12-21 13:21:47,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221044588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:47,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:47,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:21:47,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755647039] [2021-12-21 13:21:47,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:47,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:21:47,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:47,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:21:47,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:21:47,210 INFO L87 Difference]: Start difference. First operand 1732 states and 2771 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:47,533 INFO L93 Difference]: Finished difference Result 5153 states and 8152 transitions. [2021-12-21 13:21:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:21:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-21 13:21:47,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:47,544 INFO L225 Difference]: With dead ends: 5153 [2021-12-21 13:21:47,544 INFO L226 Difference]: Without dead ends: 3440 [2021-12-21 13:21:47,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:21:47,549 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 758 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:47,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1088 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-12-21 13:21:47,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3058. [2021-12-21 13:21:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3052 states have (on average 1.577653997378768) internal successors, (4815), 3056 states have internal predecessors, (4815), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 4820 transitions. [2021-12-21 13:21:47,629 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 4820 transitions. Word has length 53 [2021-12-21 13:21:47,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:47,630 INFO L470 AbstractCegarLoop]: Abstraction has 3058 states and 4820 transitions. [2021-12-21 13:21:47,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 4820 transitions. [2021-12-21 13:21:47,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 13:21:47,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:47,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:47,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:21:47,632 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1057985577, now seen corresponding path program 1 times [2021-12-21 13:21:47,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:47,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500498203] [2021-12-21 13:21:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:47,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:47,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:47,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500498203] [2021-12-21 13:21:47,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500498203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:47,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:47,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:47,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19856577] [2021-12-21 13:21:47,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:47,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:47,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:47,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:47,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:47,658 INFO L87 Difference]: Start difference. First operand 3058 states and 4820 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:47,736 INFO L93 Difference]: Finished difference Result 7193 states and 11301 transitions. [2021-12-21 13:21:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:47,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-21 13:21:47,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:47,747 INFO L225 Difference]: With dead ends: 7193 [2021-12-21 13:21:47,748 INFO L226 Difference]: Without dead ends: 4158 [2021-12-21 13:21:47,752 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 [2021-12-21 13:21:47,752 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 376 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:47,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 728 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:47,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2021-12-21 13:21:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 3974. [2021-12-21 13:21:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3968 states have (on average 1.5597278225806452) internal successors, (6189), 3972 states have internal predecessors, (6189), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 6194 transitions. [2021-12-21 13:21:47,853 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 6194 transitions. Word has length 53 [2021-12-21 13:21:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:47,853 INFO L470 AbstractCegarLoop]: Abstraction has 3974 states and 6194 transitions. [2021-12-21 13:21:47,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 6194 transitions. [2021-12-21 13:21:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 13:21:47,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:47,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:47,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:21:47,855 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:47,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:47,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1920778764, now seen corresponding path program 1 times [2021-12-21 13:21:47,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:47,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632017090] [2021-12-21 13:21:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:47,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:47,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:47,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632017090] [2021-12-21 13:21:47,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632017090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:47,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:47,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:47,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198024658] [2021-12-21 13:21:47,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:47,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:47,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:47,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:47,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:47,881 INFO L87 Difference]: Start difference. First operand 3974 states and 6194 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:48,120 INFO L93 Difference]: Finished difference Result 9562 states and 15028 transitions. [2021-12-21 13:21:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:48,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-21 13:21:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:48,136 INFO L225 Difference]: With dead ends: 9562 [2021-12-21 13:21:48,136 INFO L226 Difference]: Without dead ends: 5611 [2021-12-21 13:21:48,142 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 [2021-12-21 13:21:48,143 INFO L933 BasicCegarLoop]: 597 mSDtfsCounter, 258 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:48,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 897 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:48,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2021-12-21 13:21:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 4818. [2021-12-21 13:21:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4812 states have (on average 1.5045719035743974) internal successors, (7240), 4816 states have internal predecessors, (7240), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 7245 transitions. [2021-12-21 13:21:48,279 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 7245 transitions. Word has length 62 [2021-12-21 13:21:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:48,279 INFO L470 AbstractCegarLoop]: Abstraction has 4818 states and 7245 transitions. [2021-12-21 13:21:48,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 7245 transitions. [2021-12-21 13:21:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 13:21:48,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:48,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:48,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:21:48,282 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1239764768, now seen corresponding path program 1 times [2021-12-21 13:21:48,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:48,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445951626] [2021-12-21 13:21:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:48,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:48,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:48,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445951626] [2021-12-21 13:21:48,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445951626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:48,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:48,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:48,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788091782] [2021-12-21 13:21:48,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:48,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:48,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:48,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:48,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:48,308 INFO L87 Difference]: Start difference. First operand 4818 states and 7245 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:48,406 INFO L93 Difference]: Finished difference Result 9479 states and 14267 transitions. [2021-12-21 13:21:48,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:48,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-21 13:21:48,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:48,420 INFO L225 Difference]: With dead ends: 9479 [2021-12-21 13:21:48,420 INFO L226 Difference]: Without dead ends: 4684 [2021-12-21 13:21:48,428 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 [2021-12-21 13:21:48,429 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 353 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:48,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 451 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:48,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2021-12-21 13:21:48,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4684. [2021-12-21 13:21:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4678 states have (on average 1.4833262077811031) internal successors, (6939), 4682 states have internal predecessors, (6939), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 6944 transitions. [2021-12-21 13:21:48,566 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 6944 transitions. Word has length 64 [2021-12-21 13:21:48,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:48,566 INFO L470 AbstractCegarLoop]: Abstraction has 4684 states and 6944 transitions. [2021-12-21 13:21:48,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 6944 transitions. [2021-12-21 13:21:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 13:21:48,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:48,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:48,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:21:48,569 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:48,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:48,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1801528906, now seen corresponding path program 1 times [2021-12-21 13:21:48,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:48,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078974218] [2021-12-21 13:21:48,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:48,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:48,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:48,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078974218] [2021-12-21 13:21:48,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078974218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:48,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:48,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:48,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384833323] [2021-12-21 13:21:48,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:48,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:48,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:48,591 INFO L87 Difference]: Start difference. First operand 4684 states and 6944 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:48,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:48,730 INFO L93 Difference]: Finished difference Result 10012 states and 15006 transitions. [2021-12-21 13:21:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:48,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-21 13:21:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:48,745 INFO L225 Difference]: With dead ends: 10012 [2021-12-21 13:21:48,745 INFO L226 Difference]: Without dead ends: 5351 [2021-12-21 13:21:48,751 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 [2021-12-21 13:21:48,752 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 317 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:48,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 1018 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-12-21 13:21:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 3586. [2021-12-21 13:21:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3580 states have (on average 1.497486033519553) internal successors, (5361), 3584 states have internal predecessors, (5361), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 5366 transitions. [2021-12-21 13:21:48,890 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 5366 transitions. Word has length 65 [2021-12-21 13:21:48,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:48,890 INFO L470 AbstractCegarLoop]: Abstraction has 3586 states and 5366 transitions. [2021-12-21 13:21:48,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 5366 transitions. [2021-12-21 13:21:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 13:21:48,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:48,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:48,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:21:48,892 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:48,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:48,892 INFO L85 PathProgramCache]: Analyzing trace with hash -106317501, now seen corresponding path program 1 times [2021-12-21 13:21:48,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:48,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45652671] [2021-12-21 13:21:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:48,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:48,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:48,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45652671] [2021-12-21 13:21:48,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45652671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:48,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:48,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:21:48,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368130727] [2021-12-21 13:21:48,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:48,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:21:48,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:48,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:21:48,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:48,954 INFO L87 Difference]: Start difference. First operand 3586 states and 5366 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:49,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:49,657 INFO L93 Difference]: Finished difference Result 16912 states and 25065 transitions. [2021-12-21 13:21:49,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 13:21:49,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-21 13:21:49,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:49,683 INFO L225 Difference]: With dead ends: 16912 [2021-12-21 13:21:49,684 INFO L226 Difference]: Without dead ends: 13551 [2021-12-21 13:21:49,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:21:49,693 INFO L933 BasicCegarLoop]: 1078 mSDtfsCounter, 2149 mSDsluCounter, 2983 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2149 SdHoareTripleChecker+Valid, 4061 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:49,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2149 Valid, 4061 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:21:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13551 states. [2021-12-21 13:21:49,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13551 to 4456. [2021-12-21 13:21:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4456 states, 4450 states have (on average 1.4883146067415731) internal successors, (6623), 4454 states have internal predecessors, (6623), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 6628 transitions. [2021-12-21 13:21:49,916 INFO L78 Accepts]: Start accepts. Automaton has 4456 states and 6628 transitions. Word has length 67 [2021-12-21 13:21:49,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:49,917 INFO L470 AbstractCegarLoop]: Abstraction has 4456 states and 6628 transitions. [2021-12-21 13:21:49,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:49,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4456 states and 6628 transitions. [2021-12-21 13:21:49,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 13:21:49,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:49,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:49,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:21:49,919 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:49,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1482385041, now seen corresponding path program 1 times [2021-12-21 13:21:49,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:49,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734030526] [2021-12-21 13:21:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:49,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:49,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:49,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734030526] [2021-12-21 13:21:49,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734030526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:49,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:49,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:21:49,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744000302] [2021-12-21 13:21:49,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:49,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:21:49,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:49,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:21:49,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:21:49,956 INFO L87 Difference]: Start difference. First operand 4456 states and 6628 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:51,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:51,018 INFO L93 Difference]: Finished difference Result 30607 states and 45155 transitions. [2021-12-21 13:21:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-21 13:21:51,018 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-21 13:21:51,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:51,146 INFO L225 Difference]: With dead ends: 30607 [2021-12-21 13:21:51,146 INFO L226 Difference]: Without dead ends: 26376 [2021-12-21 13:21:51,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-12-21 13:21:51,158 INFO L933 BasicCegarLoop]: 1893 mSDtfsCounter, 3845 mSDsluCounter, 6826 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3845 SdHoareTripleChecker+Valid, 8719 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:51,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3845 Valid, 8719 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26376 states. [2021-12-21 13:21:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26376 to 4766. [2021-12-21 13:21:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4766 states, 4760 states have (on average 1.4779411764705883) internal successors, (7035), 4764 states have internal predecessors, (7035), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4766 states to 4766 states and 7040 transitions. [2021-12-21 13:21:51,501 INFO L78 Accepts]: Start accepts. Automaton has 4766 states and 7040 transitions. Word has length 68 [2021-12-21 13:21:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:51,502 INFO L470 AbstractCegarLoop]: Abstraction has 4766 states and 7040 transitions. [2021-12-21 13:21:51,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4766 states and 7040 transitions. [2021-12-21 13:21:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 13:21:51,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:51,504 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 13:21:51,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:21:51,505 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:51,505 INFO L85 PathProgramCache]: Analyzing trace with hash 810462579, now seen corresponding path program 1 times [2021-12-21 13:21:51,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:51,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383403675] [2021-12-21 13:21:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:51,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:51,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:51,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383403675] [2021-12-21 13:21:51,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383403675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:51,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:51,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:51,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572455165] [2021-12-21 13:21:51,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:51,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:51,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:51,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:51,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:51,525 INFO L87 Difference]: Start difference. First operand 4766 states and 7040 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:51,773 INFO L93 Difference]: Finished difference Result 10055 states and 14832 transitions. [2021-12-21 13:21:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:51,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-21 13:21:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:51,783 INFO L225 Difference]: With dead ends: 10055 [2021-12-21 13:21:51,783 INFO L226 Difference]: Without dead ends: 5310 [2021-12-21 13:21:51,790 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 [2021-12-21 13:21:51,790 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 143 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:51,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 834 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:51,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2021-12-21 13:21:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 5236. [2021-12-21 13:21:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5230 states have (on average 1.4747609942638624) internal successors, (7713), 5234 states have internal predecessors, (7713), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 7718 transitions. [2021-12-21 13:21:52,042 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 7718 transitions. Word has length 79 [2021-12-21 13:21:52,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:52,042 INFO L470 AbstractCegarLoop]: Abstraction has 5236 states and 7718 transitions. [2021-12-21 13:21:52,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:52,042 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 7718 transitions. [2021-12-21 13:21:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 13:21:52,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:52,044 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:52,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:21:52,044 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:52,045 INFO L85 PathProgramCache]: Analyzing trace with hash -22506739, now seen corresponding path program 1 times [2021-12-21 13:21:52,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:52,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254611739] [2021-12-21 13:21:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:52,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:52,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:52,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254611739] [2021-12-21 13:21:52,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254611739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:52,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:52,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:21:52,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918472138] [2021-12-21 13:21:52,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:52,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:21:52,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:52,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:21:52,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:21:52,068 INFO L87 Difference]: Start difference. First operand 5236 states and 7718 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:52,537 INFO L93 Difference]: Finished difference Result 14006 states and 20488 transitions. [2021-12-21 13:21:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:21:52,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-21 13:21:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:52,555 INFO L225 Difference]: With dead ends: 14006 [2021-12-21 13:21:52,555 INFO L226 Difference]: Without dead ends: 8669 [2021-12-21 13:21:52,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:21:52,564 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 658 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:52,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 1288 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8669 states. [2021-12-21 13:21:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8669 to 7699. [2021-12-21 13:21:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7699 states, 7693 states have (on average 1.443000129988301) internal successors, (11101), 7697 states have internal predecessors, (11101), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 11106 transitions. [2021-12-21 13:21:52,916 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 11106 transitions. Word has length 91 [2021-12-21 13:21:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:52,917 INFO L470 AbstractCegarLoop]: Abstraction has 7699 states and 11106 transitions. [2021-12-21 13:21:52,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 11106 transitions. [2021-12-21 13:21:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-21 13:21:52,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:52,919 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:52,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:21:52,920 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:52,920 INFO L85 PathProgramCache]: Analyzing trace with hash 713103324, now seen corresponding path program 1 times [2021-12-21 13:21:52,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:52,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206722205] [2021-12-21 13:21:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:52,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:52,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:52,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206722205] [2021-12-21 13:21:52,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206722205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:52,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:52,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:52,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001327238] [2021-12-21 13:21:52,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:52,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:52,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:52,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:52,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:52,941 INFO L87 Difference]: Start difference. First operand 7699 states and 11106 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:53,106 INFO L93 Difference]: Finished difference Result 11093 states and 16026 transitions. [2021-12-21 13:21:53,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:53,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-21 13:21:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:53,112 INFO L225 Difference]: With dead ends: 11093 [2021-12-21 13:21:53,112 INFO L226 Difference]: Without dead ends: 3397 [2021-12-21 13:21:53,120 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 [2021-12-21 13:21:53,121 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 347 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:53,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 529 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2021-12-21 13:21:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 3344. [2021-12-21 13:21:53,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3338 states have (on average 1.3523067705212701) internal successors, (4514), 3342 states have internal predecessors, (4514), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 4519 transitions. [2021-12-21 13:21:53,246 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 4519 transitions. Word has length 99 [2021-12-21 13:21:53,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:53,246 INFO L470 AbstractCegarLoop]: Abstraction has 3344 states and 4519 transitions. [2021-12-21 13:21:53,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:53,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 4519 transitions. [2021-12-21 13:21:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-21 13:21:53,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:53,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:53,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:21:53,248 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1037594014, now seen corresponding path program 1 times [2021-12-21 13:21:53,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:53,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388718271] [2021-12-21 13:21:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:53,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:53,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:53,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388718271] [2021-12-21 13:21:53,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388718271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:53,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:53,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:21:53,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074514051] [2021-12-21 13:21:53,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:53,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:21:53,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:53,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:21:53,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:21:53,275 INFO L87 Difference]: Start difference. First operand 3344 states and 4519 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:53,740 INFO L93 Difference]: Finished difference Result 12772 states and 17244 transitions. [2021-12-21 13:21:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:21:53,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-21 13:21:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:53,751 INFO L225 Difference]: With dead ends: 12772 [2021-12-21 13:21:53,752 INFO L226 Difference]: Without dead ends: 9605 [2021-12-21 13:21:53,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:21:53,757 INFO L933 BasicCegarLoop]: 1094 mSDtfsCounter, 1560 mSDsluCounter, 2344 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 3438 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:53,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 3438 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-12-21 13:21:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 3346. [2021-12-21 13:21:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3346 states, 3340 states have (on average 1.3502994011976048) internal successors, (4510), 3344 states have internal predecessors, (4510), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3346 states to 3346 states and 4515 transitions. [2021-12-21 13:21:53,928 INFO L78 Accepts]: Start accepts. Automaton has 3346 states and 4515 transitions. Word has length 101 [2021-12-21 13:21:53,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:53,928 INFO L470 AbstractCegarLoop]: Abstraction has 3346 states and 4515 transitions. [2021-12-21 13:21:53,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:53,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3346 states and 4515 transitions. [2021-12-21 13:21:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 13:21:53,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:53,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:53,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:21:53,930 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:53,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:53,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1285693593, now seen corresponding path program 1 times [2021-12-21 13:21:53,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:53,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032256073] [2021-12-21 13:21:53,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:53,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:53,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:53,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032256073] [2021-12-21 13:21:53,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032256073] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:53,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665603856] [2021-12-21 13:21:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:53,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:53,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:53,987 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) [2021-12-21 13:21:54,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 13:21:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:54,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 13:21:54,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:54,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:21:54,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665603856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:54,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:21:54,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 13:21:54,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985604433] [2021-12-21 13:21:54,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:54,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:54,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:54,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:54,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:54,299 INFO L87 Difference]: Start difference. First operand 3346 states and 4515 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:54,531 INFO L93 Difference]: Finished difference Result 3993 states and 5384 transitions. [2021-12-21 13:21:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-21 13:21:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:54,536 INFO L225 Difference]: With dead ends: 3993 [2021-12-21 13:21:54,537 INFO L226 Difference]: Without dead ends: 3989 [2021-12-21 13:21:54,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:54,538 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 241 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:54,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 819 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:54,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3989 states. [2021-12-21 13:21:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3989 to 3939. [2021-12-21 13:21:54,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3939 states, 3933 states have (on average 1.3478260869565217) internal successors, (5301), 3937 states have internal predecessors, (5301), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 5306 transitions. [2021-12-21 13:21:54,763 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 5306 transitions. Word has length 103 [2021-12-21 13:21:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:54,763 INFO L470 AbstractCegarLoop]: Abstraction has 3939 states and 5306 transitions. [2021-12-21 13:21:54,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:54,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 5306 transitions. [2021-12-21 13:21:54,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-21 13:21:54,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:54,766 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:54,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:54,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 13:21:54,983 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:54,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:54,984 INFO L85 PathProgramCache]: Analyzing trace with hash -219637223, now seen corresponding path program 1 times [2021-12-21 13:21:54,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:54,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291117308] [2021-12-21 13:21:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:54,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:55,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:55,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291117308] [2021-12-21 13:21:55,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291117308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:55,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182219600] [2021-12-21 13:21:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:55,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:55,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:55,031 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) [2021-12-21 13:21:55,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 13:21:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 13:21:55,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:55,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:21:55,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182219600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:55,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:21:55,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 13:21:55,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848960678] [2021-12-21 13:21:55,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:55,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:55,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:55,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:55,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:55,381 INFO L87 Difference]: Start difference. First operand 3939 states and 5306 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:55,620 INFO L93 Difference]: Finished difference Result 7022 states and 9512 transitions. [2021-12-21 13:21:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:55,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-12-21 13:21:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:55,624 INFO L225 Difference]: With dead ends: 7022 [2021-12-21 13:21:55,624 INFO L226 Difference]: Without dead ends: 3088 [2021-12-21 13:21:55,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:55,629 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 272 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:55,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 430 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-12-21 13:21:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 2866. [2021-12-21 13:21:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2860 states have (on average 1.3297202797202796) internal successors, (3803), 2864 states have internal predecessors, (3803), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 3808 transitions. [2021-12-21 13:21:55,842 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 3808 transitions. Word has length 160 [2021-12-21 13:21:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:55,842 INFO L470 AbstractCegarLoop]: Abstraction has 2866 states and 3808 transitions. [2021-12-21 13:21:55,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 3808 transitions. [2021-12-21 13:21:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-21 13:21:55,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:55,844 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:55,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:56,061 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,SelfDestructingSolverStorable16 [2021-12-21 13:21:56,061 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:56,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1280711905, now seen corresponding path program 1 times [2021-12-21 13:21:56,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:56,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630555049] [2021-12-21 13:21:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:56,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:56,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:56,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630555049] [2021-12-21 13:21:56,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630555049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:56,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837068560] [2021-12-21 13:21:56,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:56,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:56,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:56,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:21:56,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 13:21:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:56,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 13:21:56,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 13:21:56,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:21:56,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837068560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:56,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:21:56,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 13:21:56,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171401838] [2021-12-21 13:21:56,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:56,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:56,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:56,437 INFO L87 Difference]: Start difference. First operand 2866 states and 3808 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:56,653 INFO L93 Difference]: Finished difference Result 5560 states and 7429 transitions. [2021-12-21 13:21:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:56,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-12-21 13:21:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:56,657 INFO L225 Difference]: With dead ends: 5560 [2021-12-21 13:21:56,657 INFO L226 Difference]: Without dead ends: 2866 [2021-12-21 13:21:56,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:56,661 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 282 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:56,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 402 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:21:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-12-21 13:21:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2866. [2021-12-21 13:21:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2860 states have (on average 1.2961538461538462) internal successors, (3707), 2864 states have internal predecessors, (3707), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 3712 transitions. [2021-12-21 13:21:56,846 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 3712 transitions. Word has length 163 [2021-12-21 13:21:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:56,847 INFO L470 AbstractCegarLoop]: Abstraction has 2866 states and 3712 transitions. [2021-12-21 13:21:56,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 3712 transitions. [2021-12-21 13:21:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-21 13:21:56,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:56,849 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:56,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 13:21:57,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 13:21:57,058 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:57,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:57,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1156524976, now seen corresponding path program 1 times [2021-12-21 13:21:57,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:57,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109107018] [2021-12-21 13:21:57,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:57,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:57,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109107018] [2021-12-21 13:21:57,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109107018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775625184] [2021-12-21 13:21:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:57,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:57,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:57,108 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:21:57,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 13:21:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:57,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 13:21:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:21:57,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:21:57,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775625184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:57,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:21:57,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 13:21:57,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138071967] [2021-12-21 13:21:57,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:57,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:57,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:57,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:57,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:57,429 INFO L87 Difference]: Start difference. First operand 2866 states and 3712 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:57,815 INFO L93 Difference]: Finished difference Result 6487 states and 8570 transitions. [2021-12-21 13:21:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:57,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-12-21 13:21:57,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:57,819 INFO L225 Difference]: With dead ends: 6487 [2021-12-21 13:21:57,819 INFO L226 Difference]: Without dead ends: 3793 [2021-12-21 13:21:57,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:57,822 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 213 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:57,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 684 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2021-12-21 13:21:57,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3705. [2021-12-21 13:21:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3699 states have (on average 1.2660178426601785) internal successors, (4683), 3703 states have internal predecessors, (4683), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 4688 transitions. [2021-12-21 13:21:58,004 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 4688 transitions. Word has length 164 [2021-12-21 13:21:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:58,004 INFO L470 AbstractCegarLoop]: Abstraction has 3705 states and 4688 transitions. [2021-12-21 13:21:58,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:21:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 4688 transitions. [2021-12-21 13:21:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-21 13:21:58,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:58,006 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:58,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 13:21:58,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:58,223 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:58,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:58,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1102689509, now seen corresponding path program 1 times [2021-12-21 13:21:58,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:58,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19543309] [2021-12-21 13:21:58,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:58,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:58,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:58,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19543309] [2021-12-21 13:21:58,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19543309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:58,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764641238] [2021-12-21 13:21:58,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:58,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:58,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:58,344 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:21:58,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 13:21:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:58,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 13:21:58,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:58,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:59,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764641238] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:59,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:59,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-12-21 13:21:59,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018555547] [2021-12-21 13:21:59,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:59,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:21:59,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:59,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:21:59,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:21:59,205 INFO L87 Difference]: Start difference. First operand 3705 states and 4688 transitions. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:00,604 INFO L93 Difference]: Finished difference Result 18600 states and 23623 transitions. [2021-12-21 13:22:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-21 13:22:00,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-12-21 13:22:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:00,621 INFO L225 Difference]: With dead ends: 18600 [2021-12-21 13:22:00,621 INFO L226 Difference]: Without dead ends: 15067 [2021-12-21 13:22:00,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 341 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 13:22:00,627 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 4181 mSDsluCounter, 4852 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4181 SdHoareTripleChecker+Valid, 5741 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:00,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4181 Valid, 5741 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:22:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15067 states. [2021-12-21 13:22:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15067 to 5254. [2021-12-21 13:22:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5254 states, 5248 states have (on average 1.271341463414634) internal successors, (6672), 5252 states have internal predecessors, (6672), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 6677 transitions. [2021-12-21 13:22:00,981 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 6677 transitions. Word has length 166 [2021-12-21 13:22:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:00,982 INFO L470 AbstractCegarLoop]: Abstraction has 5254 states and 6677 transitions. [2021-12-21 13:22:00,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 6677 transitions. [2021-12-21 13:22:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-12-21 13:22:00,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:00,985 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:22:01,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 13:22:01,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:01,199 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1782230669, now seen corresponding path program 1 times [2021-12-21 13:22:01,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:01,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508492593] [2021-12-21 13:22:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:01,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:22:01,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:01,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508492593] [2021-12-21 13:22:01,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508492593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:01,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693364495] [2021-12-21 13:22:01,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:01,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:01,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:01,325 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:22:01,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 13:22:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 13:22:01,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:22:02,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:22:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:22:02,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693364495] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:22:02,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:22:02,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-12-21 13:22:02,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689946330] [2021-12-21 13:22:02,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:22:02,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 13:22:02,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:02,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 13:22:02,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:22:02,838 INFO L87 Difference]: Start difference. First operand 5254 states and 6677 transitions. Second operand has 11 states, 11 states have (on average 23.636363636363637) internal successors, (260), 11 states have internal predecessors, (260), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:04,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:04,869 INFO L93 Difference]: Finished difference Result 24208 states and 30652 transitions. [2021-12-21 13:22:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-21 13:22:04,870 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.636363636363637) internal successors, (260), 11 states have internal predecessors, (260), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2021-12-21 13:22:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:04,898 INFO L225 Difference]: With dead ends: 24208 [2021-12-21 13:22:04,898 INFO L226 Difference]: Without dead ends: 19126 [2021-12-21 13:22:04,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 545 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2021-12-21 13:22:04,909 INFO L933 BasicCegarLoop]: 1494 mSDtfsCounter, 5839 mSDsluCounter, 10366 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5839 SdHoareTripleChecker+Valid, 11860 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:04,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5839 Valid, 11860 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 13:22:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19126 states. [2021-12-21 13:22:05,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19126 to 6677. [2021-12-21 13:22:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6677 states, 6671 states have (on average 1.272822665267576) internal successors, (8491), 6675 states have internal predecessors, (8491), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6677 states to 6677 states and 8496 transitions. [2021-12-21 13:22:05,611 INFO L78 Accepts]: Start accepts. Automaton has 6677 states and 8496 transitions. Word has length 266 [2021-12-21 13:22:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:05,611 INFO L470 AbstractCegarLoop]: Abstraction has 6677 states and 8496 transitions. [2021-12-21 13:22:05,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.636363636363637) internal successors, (260), 11 states have internal predecessors, (260), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:05,612 INFO L276 IsEmpty]: Start isEmpty. Operand 6677 states and 8496 transitions. [2021-12-21 13:22:05,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-12-21 13:22:05,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:05,617 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 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, 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] [2021-12-21 13:22:05,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 13:22:05,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:05,834 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:05,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:05,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1036581045, now seen corresponding path program 1 times [2021-12-21 13:22:05,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:05,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487618254] [2021-12-21 13:22:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:05,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 13:22:06,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:06,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487618254] [2021-12-21 13:22:06,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487618254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:06,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838271122] [2021-12-21 13:22:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:06,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:06,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:06,039 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:22:06,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 13:22:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:06,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-21 13:22:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 13:22:07,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:22:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 13:22:08,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838271122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:22:08,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:22:08,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2021-12-21 13:22:08,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645562959] [2021-12-21 13:22:08,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:22:08,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 13:22:08,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 13:22:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:22:08,361 INFO L87 Difference]: Start difference. First operand 6677 states and 8496 transitions. Second operand has 13 states, 13 states have (on average 27.615384615384617) internal successors, (359), 13 states have internal predecessors, (359), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:11,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:11,406 INFO L93 Difference]: Finished difference Result 29894 states and 37793 transitions. [2021-12-21 13:22:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-21 13:22:11,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 27.615384615384617) internal successors, (359), 13 states have internal predecessors, (359), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 367 [2021-12-21 13:22:11,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:11,443 INFO L225 Difference]: With dead ends: 29894 [2021-12-21 13:22:11,443 INFO L226 Difference]: Without dead ends: 23389 [2021-12-21 13:22:11,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 751 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=2655, Unknown=0, NotChecked=0, Total=2970 [2021-12-21 13:22:11,458 INFO L933 BasicCegarLoop]: 2133 mSDtfsCounter, 7747 mSDsluCounter, 18920 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7747 SdHoareTripleChecker+Valid, 21053 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:11,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7747 Valid, 21053 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 13:22:11,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23389 states. [2021-12-21 13:22:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23389 to 8102. [2021-12-21 13:22:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8102 states, 8096 states have (on average 1.273715415019763) internal successors, (10312), 8100 states have internal predecessors, (10312), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8102 states to 8102 states and 10317 transitions. [2021-12-21 13:22:12,273 INFO L78 Accepts]: Start accepts. Automaton has 8102 states and 10317 transitions. Word has length 367 [2021-12-21 13:22:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:12,274 INFO L470 AbstractCegarLoop]: Abstraction has 8102 states and 10317 transitions. [2021-12-21 13:22:12,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 27.615384615384617) internal successors, (359), 13 states have internal predecessors, (359), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:12,275 INFO L276 IsEmpty]: Start isEmpty. Operand 8102 states and 10317 transitions. [2021-12-21 13:22:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-12-21 13:22:12,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:12,278 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-21 13:22:12,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 13:22:12,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:12,496 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:12,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1736090188, now seen corresponding path program 1 times [2021-12-21 13:22:12,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:12,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635810120] [2021-12-21 13:22:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:12,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 20 proven. 828 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 13:22:12,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:12,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635810120] [2021-12-21 13:22:12,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635810120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:12,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91268068] [2021-12-21 13:22:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:12,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:12,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:12,872 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:22:12,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 13:22:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:13,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 1340 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-21 13:22:13,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 20 proven. 828 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 13:22:14,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:22:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 20 proven. 828 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 13:22:15,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91268068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:22:15,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:22:15,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2021-12-21 13:22:15,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920909376] [2021-12-21 13:22:15,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:22:15,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 13:22:15,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:15,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 13:22:15,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-12-21 13:22:15,908 INFO L87 Difference]: Start difference. First operand 8102 states and 10317 transitions. Second operand has 15 states, 15 states have (on average 30.6) internal successors, (459), 15 states have internal predecessors, (459), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:20,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:20,253 INFO L93 Difference]: Finished difference Result 35584 states and 44938 transitions. [2021-12-21 13:22:20,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-21 13:22:20,254 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 30.6) internal successors, (459), 15 states have internal predecessors, (459), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2021-12-21 13:22:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:20,302 INFO L225 Difference]: With dead ends: 35584 [2021-12-21 13:22:20,302 INFO L226 Difference]: Without dead ends: 27654 [2021-12-21 13:22:20,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 959 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=369, Invalid=3921, Unknown=0, NotChecked=0, Total=4290 [2021-12-21 13:22:20,319 INFO L933 BasicCegarLoop]: 2772 mSDtfsCounter, 9655 mSDsluCounter, 30028 mSDsCounter, 0 mSdLazyCounter, 2230 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9655 SdHoareTripleChecker+Valid, 32800 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 2230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:20,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9655 Valid, 32800 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 2230 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 13:22:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27654 states. [2021-12-21 13:22:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27654 to 9529. [2021-12-21 13:22:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9529 states, 9523 states have (on average 1.274283314081697) internal successors, (12135), 9527 states have internal predecessors, (12135), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9529 states to 9529 states and 12140 transitions. [2021-12-21 13:22:21,397 INFO L78 Accepts]: Start accepts. Automaton has 9529 states and 12140 transitions. Word has length 469 [2021-12-21 13:22:21,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:21,398 INFO L470 AbstractCegarLoop]: Abstraction has 9529 states and 12140 transitions. [2021-12-21 13:22:21,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 30.6) internal successors, (459), 15 states have internal predecessors, (459), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:21,399 INFO L276 IsEmpty]: Start isEmpty. Operand 9529 states and 12140 transitions. [2021-12-21 13:22:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2021-12-21 13:22:21,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:21,422 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 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] [2021-12-21 13:22:21,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 13:22:21,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-21 13:22:21,622 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:21,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:21,623 INFO L85 PathProgramCache]: Analyzing trace with hash 408367013, now seen corresponding path program 1 times [2021-12-21 13:22:21,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:21,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523989020] [2021-12-21 13:22:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:21,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1356 backedges. 929 proven. 406 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-21 13:22:21,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523989020] [2021-12-21 13:22:21,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523989020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848330177] [2021-12-21 13:22:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:21,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:21,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:21,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:22:21,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 13:22:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:22,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 13:22:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1356 backedges. 1335 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-21 13:22:22,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:22:22,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848330177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:22:22,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:22:22,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-12-21 13:22:22,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508480993] [2021-12-21 13:22:22,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:22:22,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 13:22:22,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:22,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 13:22:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-21 13:22:22,768 INFO L87 Difference]: Start difference. First operand 9529 states and 12140 transitions. Second operand has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:24,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:24,696 INFO L93 Difference]: Finished difference Result 22293 states and 28260 transitions. [2021-12-21 13:22:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 13:22:24,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 572 [2021-12-21 13:22:24,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:24,718 INFO L225 Difference]: With dead ends: 22293 [2021-12-21 13:22:24,718 INFO L226 Difference]: Without dead ends: 12933 [2021-12-21 13:22:24,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2021-12-21 13:22:24,731 INFO L933 BasicCegarLoop]: 2052 mSDtfsCounter, 3517 mSDsluCounter, 7612 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 9664 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:24,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3517 Valid, 9664 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:22:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12933 states. [2021-12-21 13:22:25,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12933 to 9398. [2021-12-21 13:22:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9392 states have (on average 1.273317717206133) internal successors, (11959), 9396 states have internal predecessors, (11959), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 11964 transitions. [2021-12-21 13:22:25,725 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 11964 transitions. Word has length 572 [2021-12-21 13:22:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:25,726 INFO L470 AbstractCegarLoop]: Abstraction has 9398 states and 11964 transitions. [2021-12-21 13:22:25,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 11964 transitions. [2021-12-21 13:22:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2021-12-21 13:22:25,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:25,730 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 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, 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, 3, 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] [2021-12-21 13:22:25,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-21 13:22:25,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-21 13:22:25,951 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:25,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:25,952 INFO L85 PathProgramCache]: Analyzing trace with hash 29310338, now seen corresponding path program 1 times [2021-12-21 13:22:25,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:25,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539236112] [2021-12-21 13:22:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:25,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2021-12-21 13:22:26,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:26,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539236112] [2021-12-21 13:22:26,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539236112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:22:26,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:22:26,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:22:26,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983263361] [2021-12-21 13:22:26,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:22:26,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:22:26,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:26,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:22:26,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:22:26,041 INFO L87 Difference]: Start difference. First operand 9398 states and 11964 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:26,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:26,363 INFO L93 Difference]: Finished difference Result 11457 states and 14333 transitions. [2021-12-21 13:22:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:22:26,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 573 [2021-12-21 13:22:26,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:26,367 INFO L225 Difference]: With dead ends: 11457 [2021-12-21 13:22:26,367 INFO L226 Difference]: Without dead ends: 2112 [2021-12-21 13:22:26,375 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 [2021-12-21 13:22:26,375 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 142 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:26,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 412 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:22:26,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-12-21 13:22:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 2109. [2021-12-21 13:22:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 2105 states have (on average 1.1087885985748218) internal successors, (2334), 2107 states have internal predecessors, (2334), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 2337 transitions. [2021-12-21 13:22:26,597 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 2337 transitions. Word has length 573 [2021-12-21 13:22:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:26,597 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 2337 transitions. [2021-12-21 13:22:26,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 2337 transitions. [2021-12-21 13:22:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2021-12-21 13:22:26,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:26,601 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 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, 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, 3, 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] [2021-12-21 13:22:26,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 13:22:26,602 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:26,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:26,602 INFO L85 PathProgramCache]: Analyzing trace with hash 61583050, now seen corresponding path program 1 times [2021-12-21 13:22:26,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:26,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201459466] [2021-12-21 13:22:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:26,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2021-12-21 13:22:26,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:26,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201459466] [2021-12-21 13:22:26,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201459466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:22:26,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:22:26,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:22:26,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010648671] [2021-12-21 13:22:26,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:22:26,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:22:26,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:22:26,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:22:26,692 INFO L87 Difference]: Start difference. First operand 2109 states and 2337 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:27,187 INFO L93 Difference]: Finished difference Result 4316 states and 4827 transitions. [2021-12-21 13:22:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 13:22:27,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 574 [2021-12-21 13:22:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:27,192 INFO L225 Difference]: With dead ends: 4316 [2021-12-21 13:22:27,192 INFO L226 Difference]: Without dead ends: 3379 [2021-12-21 13:22:27,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-12-21 13:22:27,194 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 934 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 2554 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:27,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 2554 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:22:27,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3379 states. [2021-12-21 13:22:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3379 to 2101. [2021-12-21 13:22:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2097 states have (on average 1.1044349070100143) internal successors, (2316), 2099 states have internal predecessors, (2316), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 2319 transitions. [2021-12-21 13:22:27,422 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 2319 transitions. Word has length 574 [2021-12-21 13:22:27,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:27,422 INFO L470 AbstractCegarLoop]: Abstraction has 2101 states and 2319 transitions. [2021-12-21 13:22:27,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:27,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 2319 transitions. [2021-12-21 13:22:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-12-21 13:22:27,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:27,426 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 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, 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, 3, 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] [2021-12-21 13:22:27,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 13:22:27,426 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:27,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1902632470, now seen corresponding path program 1 times [2021-12-21 13:22:27,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:27,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651419752] [2021-12-21 13:22:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:27,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2021-12-21 13:22:27,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:27,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651419752] [2021-12-21 13:22:27,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651419752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:22:27,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:22:27,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:22:27,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145238668] [2021-12-21 13:22:27,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:22:27,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:22:27,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:27,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:22:27,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:22:27,506 INFO L87 Difference]: Start difference. First operand 2101 states and 2319 transitions. Second operand has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:27,825 INFO L93 Difference]: Finished difference Result 3602 states and 4006 transitions. [2021-12-21 13:22:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:22:27,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 575 [2021-12-21 13:22:27,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:27,829 INFO L225 Difference]: With dead ends: 3602 [2021-12-21 13:22:27,829 INFO L226 Difference]: Without dead ends: 2663 [2021-12-21 13:22:27,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:22:27,831 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 458 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:27,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 949 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:22:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2021-12-21 13:22:28,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2030. [2021-12-21 13:22:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2027 states have (on average 1.0735076467686235) internal successors, (2176), 2028 states have internal predecessors, (2176), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2178 transitions. [2021-12-21 13:22:28,064 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 2178 transitions. Word has length 575 [2021-12-21 13:22:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:28,065 INFO L470 AbstractCegarLoop]: Abstraction has 2030 states and 2178 transitions. [2021-12-21 13:22:28,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 2178 transitions. [2021-12-21 13:22:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2021-12-21 13:22:28,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:28,070 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 7, 7, 7, 7, 7, 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, 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, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:22:28,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 13:22:28,070 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:28,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1877942903, now seen corresponding path program 1 times [2021-12-21 13:22:28,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:28,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996771673] [2021-12-21 13:22:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:28,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 122 proven. 403 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2021-12-21 13:22:28,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:28,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996771673] [2021-12-21 13:22:28,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996771673] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:28,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061447570] [2021-12-21 13:22:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:28,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:28,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:28,488 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:22:28,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 13:22:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:28,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 13:22:28,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 124 proven. 333 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-21 13:22:29,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:22:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 30 proven. 427 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-12-21 13:22:30,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061447570] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:22:30,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:22:30,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2021-12-21 13:22:30,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710273484] [2021-12-21 13:22:30,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:22:30,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 13:22:30,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 13:22:30,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-12-21 13:22:30,499 INFO L87 Difference]: Start difference. First operand 2030 states and 2178 transitions. Second operand has 30 states, 30 states have (on average 13.966666666666667) internal successors, (419), 30 states have internal predecessors, (419), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:31,371 INFO L93 Difference]: Finished difference Result 2352 states and 2524 transitions. [2021-12-21 13:22:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 13:22:31,372 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.966666666666667) internal successors, (419), 30 states have internal predecessors, (419), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 631 [2021-12-21 13:22:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:31,374 INFO L225 Difference]: With dead ends: 2352 [2021-12-21 13:22:31,374 INFO L226 Difference]: Without dead ends: 2349 [2021-12-21 13:22:31,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1311 GetRequests, 1255 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2021-12-21 13:22:31,377 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 2509 mSDsluCounter, 7839 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2509 SdHoareTripleChecker+Valid, 8240 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:31,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2509 Valid, 8240 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:22:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-12-21 13:22:31,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2030. [2021-12-21 13:22:31,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2027 states have (on average 1.0730143068574247) internal successors, (2175), 2028 states have internal predecessors, (2175), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2177 transitions. [2021-12-21 13:22:31,616 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 2177 transitions. Word has length 631 [2021-12-21 13:22:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:31,617 INFO L470 AbstractCegarLoop]: Abstraction has 2030 states and 2177 transitions. [2021-12-21 13:22:31,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.966666666666667) internal successors, (419), 30 states have internal predecessors, (419), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 2177 transitions. [2021-12-21 13:22:31,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2021-12-21 13:22:31,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:31,622 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-12-21 13:22:31,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 13:22:31,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-21 13:22:31,836 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:31,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:31,836 INFO L85 PathProgramCache]: Analyzing trace with hash -659046380, now seen corresponding path program 1 times [2021-12-21 13:22:31,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:31,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318786875] [2021-12-21 13:22:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:31,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 352 proven. 48 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2021-12-21 13:22:32,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:32,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318786875] [2021-12-21 13:22:32,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318786875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:32,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829528706] [2021-12-21 13:22:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:32,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:32,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:32,039 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:22:32,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 13:22:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:32,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 13:22:32,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 352 proven. 48 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2021-12-21 13:22:33,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:22:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 352 proven. 48 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2021-12-21 13:22:33,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829528706] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:22:33,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:22:33,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-12-21 13:22:33,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084164510] [2021-12-21 13:22:33,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:22:33,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:22:33,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:33,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:22:33,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:22:33,758 INFO L87 Difference]: Start difference. First operand 2030 states and 2177 transitions. Second operand has 9 states, 9 states have (on average 31.555555555555557) internal successors, (284), 9 states have internal predecessors, (284), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:34,253 INFO L93 Difference]: Finished difference Result 3425 states and 3680 transitions. [2021-12-21 13:22:34,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 13:22:34,253 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 31.555555555555557) internal successors, (284), 9 states have internal predecessors, (284), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 681 [2021-12-21 13:22:34,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:34,257 INFO L225 Difference]: With dead ends: 3425 [2021-12-21 13:22:34,257 INFO L226 Difference]: Without dead ends: 2739 [2021-12-21 13:22:34,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1388 GetRequests, 1367 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-12-21 13:22:34,262 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 1150 mSDsluCounter, 2931 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 3453 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:34,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 3453 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:22:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2021-12-21 13:22:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2024. [2021-12-21 13:22:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2021 states have (on average 1.0682830282038596) internal successors, (2159), 2022 states have internal predecessors, (2159), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2161 transitions. [2021-12-21 13:22:34,510 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2161 transitions. Word has length 681 [2021-12-21 13:22:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:34,510 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 2161 transitions. [2021-12-21 13:22:34,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.555555555555557) internal successors, (284), 9 states have internal predecessors, (284), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2161 transitions. [2021-12-21 13:22:34,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2021-12-21 13:22:34,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:34,516 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 8, 8, 8, 8, 8, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:22:34,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 13:22:34,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-21 13:22:34,735 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:34,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:34,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1976417087, now seen corresponding path program 1 times [2021-12-21 13:22:34,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:34,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228692956] [2021-12-21 13:22:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:34,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 232 proven. 1011 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2021-12-21 13:22:35,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:35,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228692956] [2021-12-21 13:22:35,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228692956] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:35,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786743879] [2021-12-21 13:22:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:35,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:35,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:35,163 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:22:35,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 13:22:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:35,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 2010 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-21 13:22:35,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 319 proven. 870 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2021-12-21 13:22:37,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:22:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 35 proven. 1154 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2021-12-21 13:22:38,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786743879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:22:38,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:22:38,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 34 [2021-12-21 13:22:38,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385240982] [2021-12-21 13:22:38,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:22:38,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-21 13:22:38,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:38,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-21 13:22:38,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 13:22:38,194 INFO L87 Difference]: Start difference. First operand 2024 states and 2161 transitions. Second operand has 34 states, 34 states have (on average 20.852941176470587) internal successors, (709), 34 states have internal predecessors, (709), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:39,236 INFO L93 Difference]: Finished difference Result 2277 states and 2431 transitions. [2021-12-21 13:22:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-21 13:22:39,237 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 20.852941176470587) internal successors, (709), 34 states have internal predecessors, (709), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 739 [2021-12-21 13:22:39,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:39,240 INFO L225 Difference]: With dead ends: 2277 [2021-12-21 13:22:39,240 INFO L226 Difference]: Without dead ends: 2274 [2021-12-21 13:22:39,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1541 GetRequests, 1475 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=447, Invalid=3585, Unknown=0, NotChecked=0, Total=4032 [2021-12-21 13:22:39,242 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 3267 mSDsluCounter, 12597 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3267 SdHoareTripleChecker+Valid, 13237 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:39,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3267 Valid, 13237 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:22:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-12-21 13:22:39,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 2024. [2021-12-21 13:22:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2021 states have (on average 1.0677882236516576) internal successors, (2158), 2022 states have internal predecessors, (2158), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2160 transitions. [2021-12-21 13:22:39,496 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2160 transitions. Word has length 739 [2021-12-21 13:22:39,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:39,496 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 2160 transitions. [2021-12-21 13:22:39,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 20.852941176470587) internal successors, (709), 34 states have internal predecessors, (709), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2160 transitions. [2021-12-21 13:22:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2021-12-21 13:22:39,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:39,503 INFO L514 BasicCegarLoop]: trace histogram [15, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:22:39,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 13:22:39,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:39,723 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash -915433764, now seen corresponding path program 1 times [2021-12-21 13:22:39,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:39,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931304013] [2021-12-21 13:22:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:39,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 593 proven. 212 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-12-21 13:22:39,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:39,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931304013] [2021-12-21 13:22:39,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931304013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:39,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855974776] [2021-12-21 13:22:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:39,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:39,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:39,924 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:22:39,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 13:22:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:40,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2139 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 13:22:40,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 593 proven. 212 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-12-21 13:22:41,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:22:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 593 proven. 212 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2021-12-21 13:22:42,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855974776] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:22:42,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:22:42,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2021-12-21 13:22:42,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261777136] [2021-12-21 13:22:42,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:22:42,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 13:22:42,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:42,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 13:22:42,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:22:42,277 INFO L87 Difference]: Start difference. First operand 2024 states and 2160 transitions. Second operand has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:42,795 INFO L93 Difference]: Finished difference Result 3055 states and 3271 transitions. [2021-12-21 13:22:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 13:22:42,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 789 [2021-12-21 13:22:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:42,799 INFO L225 Difference]: With dead ends: 3055 [2021-12-21 13:22:42,799 INFO L226 Difference]: Without dead ends: 2563 [2021-12-21 13:22:42,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1611 GetRequests, 1584 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-12-21 13:22:42,800 INFO L933 BasicCegarLoop]: 706 mSDtfsCounter, 1427 mSDsluCounter, 5155 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 5861 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:42,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1427 Valid, 5861 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:22:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-12-21 13:22:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2020. [2021-12-21 13:22:43,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2017 states have (on average 1.0629647992067426) internal successors, (2144), 2018 states have internal predecessors, (2144), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 2146 transitions. [2021-12-21 13:22:43,057 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 2146 transitions. Word has length 789 [2021-12-21 13:22:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:43,057 INFO L470 AbstractCegarLoop]: Abstraction has 2020 states and 2146 transitions. [2021-12-21 13:22:43,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:43,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 2146 transitions. [2021-12-21 13:22:43,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2021-12-21 13:22:43,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:43,064 INFO L514 BasicCegarLoop]: trace histogram [16, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-21 13:22:43,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 13:22:43,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-21 13:22:43,283 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:43,283 INFO L85 PathProgramCache]: Analyzing trace with hash -564749760, now seen corresponding path program 1 times [2021-12-21 13:22:43,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:43,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101560823] [2021-12-21 13:22:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:43,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 189 proven. 1783 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-21 13:22:43,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:43,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101560823] [2021-12-21 13:22:43,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101560823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:43,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929788570] [2021-12-21 13:22:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:43,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:43,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:43,741 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:22:43,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 13:22:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:44,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 2280 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-21 13:22:44,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 422 proven. 1514 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-21 13:22:45,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:22:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 40 proven. 1896 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-21 13:22:46,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929788570] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:22:46,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:22:46,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 40 [2021-12-21 13:22:46,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002019262] [2021-12-21 13:22:46,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:22:46,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-21 13:22:46,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:46,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-21 13:22:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 13:22:46,160 INFO L87 Difference]: Start difference. First operand 2020 states and 2146 transitions. Second operand has 40 states, 40 states have (on average 25.55) internal successors, (1022), 40 states have internal predecessors, (1022), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:47,236 INFO L93 Difference]: Finished difference Result 2283 states and 2426 transitions. [2021-12-21 13:22:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-21 13:22:47,237 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 25.55) internal successors, (1022), 40 states have internal predecessors, (1022), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 848 [2021-12-21 13:22:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:47,240 INFO L225 Difference]: With dead ends: 2283 [2021-12-21 13:22:47,240 INFO L226 Difference]: Without dead ends: 2280 [2021-12-21 13:22:47,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1773 GetRequests, 1694 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=5181, Unknown=0, NotChecked=0, Total=5700 [2021-12-21 13:22:47,245 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 3590 mSDsluCounter, 21317 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3590 SdHoareTripleChecker+Valid, 22201 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:47,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3590 Valid, 22201 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:22:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-12-21 13:22:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2020. [2021-12-21 13:22:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2017 states have (on average 1.0624690133862171) internal successors, (2143), 2018 states have internal predecessors, (2143), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 2145 transitions. [2021-12-21 13:22:47,513 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 2145 transitions. Word has length 848 [2021-12-21 13:22:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:47,514 INFO L470 AbstractCegarLoop]: Abstraction has 2020 states and 2145 transitions. [2021-12-21 13:22:47,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 25.55) internal successors, (1022), 40 states have internal predecessors, (1022), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:47,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 2145 transitions. [2021-12-21 13:22:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 899 [2021-12-21 13:22:47,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:47,521 INFO L514 BasicCegarLoop]: trace histogram [17, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:22:47,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 13:22:47,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:47,736 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:47,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:47,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1919800221, now seen corresponding path program 1 times [2021-12-21 13:22:47,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:47,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430614117] [2021-12-21 13:22:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:47,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 834 proven. 493 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2021-12-21 13:22:48,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:48,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430614117] [2021-12-21 13:22:48,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430614117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:48,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169440821] [2021-12-21 13:22:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:48,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:48,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:48,184 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:22:48,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 13:22:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:48,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 2409 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-21 13:22:48,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 834 proven. 493 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2021-12-21 13:22:49,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:22:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 834 proven. 493 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2021-12-21 13:22:50,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169440821] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:22:50,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:22:50,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2021-12-21 13:22:50,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335468985] [2021-12-21 13:22:50,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:22:50,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 13:22:50,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:50,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 13:22:50,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:22:50,713 INFO L87 Difference]: Start difference. First operand 2020 states and 2145 transitions. Second operand has 13 states, 13 states have (on average 38.23076923076923) internal successors, (497), 13 states have internal predecessors, (497), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:51,287 INFO L93 Difference]: Finished difference Result 2687 states and 2864 transitions. [2021-12-21 13:22:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 13:22:51,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 38.23076923076923) internal successors, (497), 13 states have internal predecessors, (497), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 898 [2021-12-21 13:22:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:51,291 INFO L225 Difference]: With dead ends: 2687 [2021-12-21 13:22:51,291 INFO L226 Difference]: Without dead ends: 2389 [2021-12-21 13:22:51,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1836 GetRequests, 1805 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-12-21 13:22:51,293 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 1678 mSDsluCounter, 8170 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 9062 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:51,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1678 Valid, 9062 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:22:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2021-12-21 13:22:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2018. [2021-12-21 13:22:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2015 states have (on average 1.0575682382133995) internal successors, (2131), 2016 states have internal predecessors, (2131), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2133 transitions. [2021-12-21 13:22:51,590 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2133 transitions. Word has length 898 [2021-12-21 13:22:51,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:51,591 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 2133 transitions. [2021-12-21 13:22:51,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.23076923076923) internal successors, (497), 13 states have internal predecessors, (497), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 13:22:51,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2133 transitions. [2021-12-21 13:22:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2021-12-21 13:22:51,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:51,599 INFO L514 BasicCegarLoop]: trace histogram [18, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 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, 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] [2021-12-21 13:22:51,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-21 13:22:51,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:51,815 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:51,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:51,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1153982525, now seen corresponding path program 1 times [2021-12-21 13:22:51,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:51,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123800569] [2021-12-21 13:22:51,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:51,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 146 proven. 2564 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-21 13:22:52,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:52,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123800569] [2021-12-21 13:22:52,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123800569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:52,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161133747] [2021-12-21 13:22:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:52,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:52,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:52,358 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:22:52,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 13:22:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:52,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 2551 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-21 13:22:52,661 INFO L286 TraceCheckSpWp]: Computing forward predicates...