./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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 291c2115713bbaa0f9f6deebfd096e226de91dfa7091a11105c0815d1cda6526 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:18:19,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:18:19,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:18:19,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:18:19,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:18:19,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:18:19,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:18:19,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:18:19,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:18:19,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:18:19,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:18:19,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:18:19,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:18:19,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:18:19,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:18:19,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:18:19,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:18:19,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:18:19,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:18:19,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:18:19,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:18:19,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:18:19,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:18:19,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:18:19,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:18:19,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:18:19,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:18:19,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:18:19,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:18:19,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:18:19,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:18:19,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:18:19,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:18:19,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:18:19,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:18:19,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:18:19,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:18:19,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:18:19,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:18:19,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:18:19,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:18:19,614 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:18:19,643 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:18:19,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:18:19,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:18:19,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:18:19,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:18:19,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:18:19,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:18:19,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:18:19,647 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:18:19,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:18:19,648 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:18:19,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:18:19,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:18:19,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:18:19,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:18:19,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:18:19,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:18:19,649 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:18:19,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:18:19,649 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:18:19,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:18:19,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:18:19,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:18:19,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:18:19,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:18:19,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:18:19,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:18:19,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:18:19,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:18:19,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:18:19,651 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:18:19,651 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:18:19,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:18:19,652 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 291c2115713bbaa0f9f6deebfd096e226de91dfa7091a11105c0815d1cda6526 [2021-12-28 01:18:19,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:18:19,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:18:19,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:18:19,962 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:18:19,962 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:18:19,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-28 01:18:20,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f96ab9a6/179a8e48097a49589f8a3caafcaf6ae2/FLAG315b64a0d [2021-12-28 01:18:20,421 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:18:20,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-28 01:18:20,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f96ab9a6/179a8e48097a49589f8a3caafcaf6ae2/FLAG315b64a0d [2021-12-28 01:18:20,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f96ab9a6/179a8e48097a49589f8a3caafcaf6ae2 [2021-12-28 01:18:20,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:18:20,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:18:20,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:18:20,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:18:20,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:18:20,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:18:20" (1/1) ... [2021-12-28 01:18:20,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5056b459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20, skipping insertion in model container [2021-12-28 01:18:20,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:18:20" (1/1) ... [2021-12-28 01:18:20,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:18:20,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:18:20,684 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/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2021-12-28 01:18:20,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:18:20,787 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:18:20,837 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/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2021-12-28 01:18:20,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:18:20,875 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:18:20,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20 WrapperNode [2021-12-28 01:18:20,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:18:20,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:18:20,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:18:20,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:18:20,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20" (1/1) ... [2021-12-28 01:18:20,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20" (1/1) ... [2021-12-28 01:18:20,940 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 572 [2021-12-28 01:18:20,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:18:20,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:18:20,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:18:20,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:18:20,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20" (1/1) ... [2021-12-28 01:18:20,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20" (1/1) ... [2021-12-28 01:18:20,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20" (1/1) ... [2021-12-28 01:18:20,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20" (1/1) ... [2021-12-28 01:18:20,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20" (1/1) ... [2021-12-28 01:18:20,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20" (1/1) ... [2021-12-28 01:18:20,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20" (1/1) ... [2021-12-28 01:18:20,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:18:20,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:18:20,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:18:20,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:18:20,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20" (1/1) ... [2021-12-28 01:18:21,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:18:21,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:18:21,045 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) [2021-12-28 01:18:21,106 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 [2021-12-28 01:18:21,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:18:21,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:18:21,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:18:21,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:18:21,236 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:18:21,237 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:18:21,755 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:18:21,765 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:18:21,766 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 01:18:21,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:18:21 BoogieIcfgContainer [2021-12-28 01:18:21,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:18:21,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:18:21,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:18:21,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:18:21,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:18:20" (1/3) ... [2021-12-28 01:18:21,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a63c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:18:21, skipping insertion in model container [2021-12-28 01:18:21,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:18:20" (2/3) ... [2021-12-28 01:18:21,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a63c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:18:21, skipping insertion in model container [2021-12-28 01:18:21,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:18:21" (3/3) ... [2021-12-28 01:18:21,774 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-28 01:18:21,778 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:18:21,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:18:21,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:18:21,830 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 [2021-12-28 01:18:21,831 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:18:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 132 states have (on average 1.75) internal successors, (231), 133 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 01:18:21,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:21,849 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] [2021-12-28 01:18:21,850 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:21,854 INFO L85 PathProgramCache]: Analyzing trace with hash -278043806, now seen corresponding path program 1 times [2021-12-28 01:18:21,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:21,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941839826] [2021-12-28 01:18:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:21,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:22,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941839826] [2021-12-28 01:18:22,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941839826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:22,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:22,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:18:22,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123404925] [2021-12-28 01:18:22,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:22,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:18:22,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:22,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:18:22,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:18:22,168 INFO L87 Difference]: Start difference. First operand has 134 states, 132 states have (on average 1.75) internal successors, (231), 133 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:22,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:22,286 INFO L93 Difference]: Finished difference Result 297 states and 500 transitions. [2021-12-28 01:18:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:18:22,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-28 01:18:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:22,306 INFO L225 Difference]: With dead ends: 297 [2021-12-28 01:18:22,307 INFO L226 Difference]: Without dead ends: 205 [2021-12-28 01:18:22,311 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 [2021-12-28 01:18:22,315 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 132 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:22,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 406 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:18:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-28 01:18:22,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2021-12-28 01:18:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.5970149253731343) internal successors, (321), 201 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:22,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 321 transitions. [2021-12-28 01:18:22,399 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 321 transitions. Word has length 50 [2021-12-28 01:18:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:22,400 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 321 transitions. [2021-12-28 01:18:22,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 321 transitions. [2021-12-28 01:18:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-28 01:18:22,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:22,403 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] [2021-12-28 01:18:22,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:18:22,404 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:22,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:22,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1333847823, now seen corresponding path program 1 times [2021-12-28 01:18:22,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:22,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78467462] [2021-12-28 01:18:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:22,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:22,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:22,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78467462] [2021-12-28 01:18:22,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78467462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:22,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:22,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:18:22,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371065248] [2021-12-28 01:18:22,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:22,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:18:22,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:22,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:18:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:18:22,536 INFO L87 Difference]: Start difference. First operand 202 states and 321 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:22,605 INFO L93 Difference]: Finished difference Result 496 states and 805 transitions. [2021-12-28 01:18:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:18:22,606 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-28 01:18:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:22,608 INFO L225 Difference]: With dead ends: 496 [2021-12-28 01:18:22,608 INFO L226 Difference]: Without dead ends: 342 [2021-12-28 01:18:22,609 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 [2021-12-28 01:18:22,610 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 118 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:22,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 385 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:22,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-28 01:18:22,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 338. [2021-12-28 01:18:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.6112759643916914) internal successors, (543), 337 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 543 transitions. [2021-12-28 01:18:22,673 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 543 transitions. Word has length 52 [2021-12-28 01:18:22,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:22,674 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 543 transitions. [2021-12-28 01:18:22,675 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:22,675 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 543 transitions. [2021-12-28 01:18:22,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-28 01:18:22,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:22,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:18:22,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:18:22,678 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:22,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:22,678 INFO L85 PathProgramCache]: Analyzing trace with hash 329846722, now seen corresponding path program 1 times [2021-12-28 01:18:22,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:22,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325591895] [2021-12-28 01:18:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:22,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:22,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:22,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325591895] [2021-12-28 01:18:22,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325591895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:22,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:22,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:18:22,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915474858] [2021-12-28 01:18:22,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:22,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:18:22,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:22,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:18:22,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:18:22,731 INFO L87 Difference]: Start difference. First operand 338 states and 543 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:22,769 INFO L93 Difference]: Finished difference Result 890 states and 1445 transitions. [2021-12-28 01:18:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:18:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-28 01:18:22,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:22,772 INFO L225 Difference]: With dead ends: 890 [2021-12-28 01:18:22,772 INFO L226 Difference]: Without dead ends: 600 [2021-12-28 01:18:22,773 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 [2021-12-28 01:18:22,774 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 113 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:22,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 386 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-12-28 01:18:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 594. [2021-12-28 01:18:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.6104553119730185) internal successors, (955), 593 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 955 transitions. [2021-12-28 01:18:22,814 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 955 transitions. Word has length 54 [2021-12-28 01:18:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:22,815 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 955 transitions. [2021-12-28 01:18:22,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 955 transitions. [2021-12-28 01:18:22,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-28 01:18:22,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:22,817 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] [2021-12-28 01:18:22,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:18:22,817 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:22,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:22,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1296814383, now seen corresponding path program 1 times [2021-12-28 01:18:22,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:22,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201020189] [2021-12-28 01:18:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:22,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:22,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:22,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201020189] [2021-12-28 01:18:22,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201020189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:22,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:22,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:18:22,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906552485] [2021-12-28 01:18:22,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:22,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:18:22,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:22,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:18:22,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:18:22,871 INFO L87 Difference]: Start difference. First operand 594 states and 955 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:23,069 INFO L93 Difference]: Finished difference Result 2582 states and 4241 transitions. [2021-12-28 01:18:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:18:23,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-28 01:18:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:23,077 INFO L225 Difference]: With dead ends: 2582 [2021-12-28 01:18:23,077 INFO L226 Difference]: Without dead ends: 2036 [2021-12-28 01:18:23,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:18:23,079 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 851 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:23,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 1294 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:18:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-12-28 01:18:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1071. [2021-12-28 01:18:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 1.6196261682242992) internal successors, (1733), 1070 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1733 transitions. [2021-12-28 01:18:23,146 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1733 transitions. Word has length 56 [2021-12-28 01:18:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:23,146 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 1733 transitions. [2021-12-28 01:18:23,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1733 transitions. [2021-12-28 01:18:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:18:23,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:23,157 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] [2021-12-28 01:18:23,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:18:23,157 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:23,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1484036003, now seen corresponding path program 1 times [2021-12-28 01:18:23,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:23,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362039711] [2021-12-28 01:18:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:23,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:23,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:23,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362039711] [2021-12-28 01:18:23,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362039711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:23,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:23,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:18:23,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742361516] [2021-12-28 01:18:23,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:23,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:18:23,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:18:23,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:18:23,199 INFO L87 Difference]: Start difference. First operand 1071 states and 1733 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:23,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:23,364 INFO L93 Difference]: Finished difference Result 3136 states and 5140 transitions. [2021-12-28 01:18:23,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:18:23,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-28 01:18:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:23,372 INFO L225 Difference]: With dead ends: 3136 [2021-12-28 01:18:23,372 INFO L226 Difference]: Without dead ends: 2113 [2021-12-28 01:18:23,374 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 [2021-12-28 01:18:23,375 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 404 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:23,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 606 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-12-28 01:18:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1583. [2021-12-28 01:18:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 1.6270543615676358) internal successors, (2574), 1582 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2574 transitions. [2021-12-28 01:18:23,493 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2574 transitions. Word has length 57 [2021-12-28 01:18:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:23,494 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 2574 transitions. [2021-12-28 01:18:23,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2574 transitions. [2021-12-28 01:18:23,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-28 01:18:23,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:23,496 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] [2021-12-28 01:18:23,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:18:23,496 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1297470346, now seen corresponding path program 1 times [2021-12-28 01:18:23,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:23,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387647947] [2021-12-28 01:18:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:23,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:23,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:23,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387647947] [2021-12-28 01:18:23,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387647947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:23,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:23,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:18:23,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624578262] [2021-12-28 01:18:23,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:23,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:18:23,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:23,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:18:23,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:18:23,535 INFO L87 Difference]: Start difference. First operand 1583 states and 2574 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:23,761 INFO L93 Difference]: Finished difference Result 4604 states and 7538 transitions. [2021-12-28 01:18:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:18:23,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-28 01:18:23,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:23,771 INFO L225 Difference]: With dead ends: 4604 [2021-12-28 01:18:23,772 INFO L226 Difference]: Without dead ends: 3069 [2021-12-28 01:18:23,774 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 [2021-12-28 01:18:23,775 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 402 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:23,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 649 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-12-28 01:18:23,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2314. [2021-12-28 01:18:23,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2313 states have (on average 1.6260268050151319) internal successors, (3761), 2313 states have internal predecessors, (3761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3761 transitions. [2021-12-28 01:18:23,958 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3761 transitions. Word has length 58 [2021-12-28 01:18:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:23,959 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 3761 transitions. [2021-12-28 01:18:23,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3761 transitions. [2021-12-28 01:18:23,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-28 01:18:23,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:23,961 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] [2021-12-28 01:18:23,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:18:23,961 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:23,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:23,962 INFO L85 PathProgramCache]: Analyzing trace with hash -370820470, now seen corresponding path program 1 times [2021-12-28 01:18:23,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:23,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322676590] [2021-12-28 01:18:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:23,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:23,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:23,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322676590] [2021-12-28 01:18:23,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322676590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:23,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:23,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:18:23,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459435112] [2021-12-28 01:18:23,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:23,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:18:23,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:23,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:18:23,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:18:23,992 INFO L87 Difference]: Start difference. First operand 2314 states and 3761 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:24,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:24,252 INFO L93 Difference]: Finished difference Result 5104 states and 8336 transitions. [2021-12-28 01:18:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:18:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-28 01:18:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:24,267 INFO L225 Difference]: With dead ends: 5104 [2021-12-28 01:18:24,267 INFO L226 Difference]: Without dead ends: 3495 [2021-12-28 01:18:24,272 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 [2021-12-28 01:18:24,273 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 117 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:24,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 451 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2021-12-28 01:18:24,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 3493. [2021-12-28 01:18:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3493 states, 3492 states have (on average 1.622852233676976) internal successors, (5667), 3492 states have internal predecessors, (5667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 5667 transitions. [2021-12-28 01:18:24,525 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 5667 transitions. Word has length 59 [2021-12-28 01:18:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:24,525 INFO L470 AbstractCegarLoop]: Abstraction has 3493 states and 5667 transitions. [2021-12-28 01:18:24,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 5667 transitions. [2021-12-28 01:18:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-28 01:18:24,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:24,526 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] [2021-12-28 01:18:24,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:18:24,527 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:24,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1594203451, now seen corresponding path program 1 times [2021-12-28 01:18:24,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:24,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360420881] [2021-12-28 01:18:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:24,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:24,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:24,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360420881] [2021-12-28 01:18:24,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360420881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:24,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:24,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:18:24,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234158423] [2021-12-28 01:18:24,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:24,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:18:24,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:18:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:18:24,578 INFO L87 Difference]: Start difference. First operand 3493 states and 5667 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:24,996 INFO L93 Difference]: Finished difference Result 6911 states and 11267 transitions. [2021-12-28 01:18:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:18:24,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-28 01:18:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:25,014 INFO L225 Difference]: With dead ends: 6911 [2021-12-28 01:18:25,014 INFO L226 Difference]: Without dead ends: 4911 [2021-12-28 01:18:25,018 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 [2021-12-28 01:18:25,019 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 112 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:25,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 434 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-12-28 01:18:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 4909. [2021-12-28 01:18:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4909 states, 4908 states have (on average 1.6187856560717195) internal successors, (7945), 4908 states have internal predecessors, (7945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 7945 transitions. [2021-12-28 01:18:25,357 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 7945 transitions. Word has length 59 [2021-12-28 01:18:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:25,359 INFO L470 AbstractCegarLoop]: Abstraction has 4909 states and 7945 transitions. [2021-12-28 01:18:25,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 7945 transitions. [2021-12-28 01:18:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-28 01:18:25,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:25,361 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] [2021-12-28 01:18:25,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:18:25,361 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:25,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:25,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1620263222, now seen corresponding path program 1 times [2021-12-28 01:18:25,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:25,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944244444] [2021-12-28 01:18:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:25,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:25,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:25,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944244444] [2021-12-28 01:18:25,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944244444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:25,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:25,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:18:25,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871403672] [2021-12-28 01:18:25,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:25,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:18:25,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:25,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:18:25,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:18:25,417 INFO L87 Difference]: Start difference. First operand 4909 states and 7945 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:26,023 INFO L93 Difference]: Finished difference Result 15138 states and 24625 transitions. [2021-12-28 01:18:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:18:26,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-28 01:18:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:26,061 INFO L225 Difference]: With dead ends: 15138 [2021-12-28 01:18:26,062 INFO L226 Difference]: Without dead ends: 10357 [2021-12-28 01:18:26,073 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 [2021-12-28 01:18:26,074 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 400 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:26,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 565 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:26,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10357 states. [2021-12-28 01:18:26,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10357 to 7607. [2021-12-28 01:18:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7607 states, 7606 states have (on average 1.6149092821456745) internal successors, (12283), 7606 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7607 states to 7607 states and 12283 transitions. [2021-12-28 01:18:26,593 INFO L78 Accepts]: Start accepts. Automaton has 7607 states and 12283 transitions. Word has length 59 [2021-12-28 01:18:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:26,594 INFO L470 AbstractCegarLoop]: Abstraction has 7607 states and 12283 transitions. [2021-12-28 01:18:26,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 7607 states and 12283 transitions. [2021-12-28 01:18:26,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-28 01:18:26,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:26,595 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] [2021-12-28 01:18:26,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:18:26,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:26,596 INFO L85 PathProgramCache]: Analyzing trace with hash -515214271, now seen corresponding path program 1 times [2021-12-28 01:18:26,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:26,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296645701] [2021-12-28 01:18:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:26,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:26,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296645701] [2021-12-28 01:18:26,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296645701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:26,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:26,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:18:26,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505987037] [2021-12-28 01:18:26,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:26,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:18:26,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:18:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:18:26,654 INFO L87 Difference]: Start difference. First operand 7607 states and 12283 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:27,307 INFO L93 Difference]: Finished difference Result 16681 states and 27278 transitions. [2021-12-28 01:18:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:18:27,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-28 01:18:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:27,340 INFO L225 Difference]: With dead ends: 16681 [2021-12-28 01:18:27,341 INFO L226 Difference]: Without dead ends: 11156 [2021-12-28 01:18:27,355 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 [2021-12-28 01:18:27,355 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 122 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:27,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 477 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:27,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11156 states. [2021-12-28 01:18:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11156 to 11154. [2021-12-28 01:18:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11154 states, 11153 states have (on average 1.6192055949072) internal successors, (18059), 11153 states have internal predecessors, (18059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 18059 transitions. [2021-12-28 01:18:28,094 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 18059 transitions. Word has length 59 [2021-12-28 01:18:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:28,095 INFO L470 AbstractCegarLoop]: Abstraction has 11154 states and 18059 transitions. [2021-12-28 01:18:28,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 18059 transitions. [2021-12-28 01:18:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-28 01:18:28,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:28,099 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] [2021-12-28 01:18:28,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:18:28,100 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:28,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:28,100 INFO L85 PathProgramCache]: Analyzing trace with hash 482860251, now seen corresponding path program 1 times [2021-12-28 01:18:28,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:28,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950086479] [2021-12-28 01:18:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:28,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:28,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:28,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950086479] [2021-12-28 01:18:28,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950086479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:28,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:28,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:18:28,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274853462] [2021-12-28 01:18:28,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:28,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:18:28,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:28,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:18:28,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:18:28,199 INFO L87 Difference]: Start difference. First operand 11154 states and 18059 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:28,879 INFO L93 Difference]: Finished difference Result 22235 states and 36014 transitions. [2021-12-28 01:18:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:18:28,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-28 01:18:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:28,907 INFO L225 Difference]: With dead ends: 22235 [2021-12-28 01:18:28,908 INFO L226 Difference]: Without dead ends: 11156 [2021-12-28 01:18:28,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:18:28,929 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 285 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:28,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 559 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11156 states. [2021-12-28 01:18:29,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11156 to 11154. [2021-12-28 01:18:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11154 states, 11153 states have (on average 1.6079978481126154) internal successors, (17934), 11153 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 17934 transitions. [2021-12-28 01:18:29,646 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 17934 transitions. Word has length 61 [2021-12-28 01:18:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:29,646 INFO L470 AbstractCegarLoop]: Abstraction has 11154 states and 17934 transitions. [2021-12-28 01:18:29,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 17934 transitions. [2021-12-28 01:18:29,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 01:18:29,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:29,648 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] [2021-12-28 01:18:29,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:18:29,649 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:29,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1004302872, now seen corresponding path program 1 times [2021-12-28 01:18:29,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:29,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129193011] [2021-12-28 01:18:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:29,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:29,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:29,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129193011] [2021-12-28 01:18:29,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129193011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:29,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:29,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:18:29,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442884384] [2021-12-28 01:18:29,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:29,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:18:29,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:29,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:18:29,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:18:29,729 INFO L87 Difference]: Start difference. First operand 11154 states and 17934 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:31,256 INFO L93 Difference]: Finished difference Result 31937 states and 51506 transitions. [2021-12-28 01:18:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:18:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-28 01:18:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:31,306 INFO L225 Difference]: With dead ends: 31937 [2021-12-28 01:18:31,307 INFO L226 Difference]: Without dead ends: 20858 [2021-12-28 01:18:31,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:18:31,325 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 392 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:31,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 567 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20858 states. [2021-12-28 01:18:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20858 to 20856. [2021-12-28 01:18:32,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20856 states, 20855 states have (on average 1.596116039319108) internal successors, (33287), 20855 states have internal predecessors, (33287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20856 states to 20856 states and 33287 transitions. [2021-12-28 01:18:32,840 INFO L78 Accepts]: Start accepts. Automaton has 20856 states and 33287 transitions. Word has length 64 [2021-12-28 01:18:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:32,841 INFO L470 AbstractCegarLoop]: Abstraction has 20856 states and 33287 transitions. [2021-12-28 01:18:32,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 20856 states and 33287 transitions. [2021-12-28 01:18:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 01:18:32,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:32,842 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] [2021-12-28 01:18:32,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:18:32,842 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:32,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1070527272, now seen corresponding path program 1 times [2021-12-28 01:18:32,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:32,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809048728] [2021-12-28 01:18:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:32,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:18:32,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:32,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809048728] [2021-12-28 01:18:32,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809048728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:32,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:32,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:18:32,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102919122] [2021-12-28 01:18:32,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:32,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:18:32,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:18:32,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:18:32,927 INFO L87 Difference]: Start difference. First operand 20856 states and 33287 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:35,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:35,459 INFO L93 Difference]: Finished difference Result 39968 states and 63509 transitions. [2021-12-28 01:18:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:18:35,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-28 01:18:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:35,536 INFO L225 Difference]: With dead ends: 39968 [2021-12-28 01:18:35,536 INFO L226 Difference]: Without dead ends: 39966 [2021-12-28 01:18:35,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:18:35,551 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 250 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:35,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 956 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39966 states. [2021-12-28 01:18:38,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39966 to 21580. [2021-12-28 01:18:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21580 states, 21579 states have (on average 1.5756985958570833) internal successors, (34002), 21579 states have internal predecessors, (34002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21580 states to 21580 states and 34002 transitions. [2021-12-28 01:18:38,058 INFO L78 Accepts]: Start accepts. Automaton has 21580 states and 34002 transitions. Word has length 65 [2021-12-28 01:18:38,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:38,059 INFO L470 AbstractCegarLoop]: Abstraction has 21580 states and 34002 transitions. [2021-12-28 01:18:38,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 21580 states and 34002 transitions. [2021-12-28 01:18:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-28 01:18:38,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:38,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:18:38,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:18:38,062 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:38,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1104420716, now seen corresponding path program 1 times [2021-12-28 01:18:38,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:38,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003703385] [2021-12-28 01:18:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:38,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 01:18:38,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:38,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003703385] [2021-12-28 01:18:38,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003703385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:38,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:38,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:18:38,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717112700] [2021-12-28 01:18:38,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:38,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:18:38,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:38,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:18:38,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:18:38,125 INFO L87 Difference]: Start difference. First operand 21580 states and 34002 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:41,371 INFO L93 Difference]: Finished difference Result 52596 states and 83206 transitions. [2021-12-28 01:18:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:18:41,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-28 01:18:41,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:41,454 INFO L225 Difference]: With dead ends: 52596 [2021-12-28 01:18:41,454 INFO L226 Difference]: Without dead ends: 42404 [2021-12-28 01:18:41,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:18:41,484 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 509 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:41,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 976 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42404 states. [2021-12-28 01:18:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42404 to 33114. [2021-12-28 01:18:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33114 states, 33113 states have (on average 1.5749101561320327) internal successors, (52150), 33113 states have internal predecessors, (52150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33114 states to 33114 states and 52150 transitions. [2021-12-28 01:18:44,258 INFO L78 Accepts]: Start accepts. Automaton has 33114 states and 52150 transitions. Word has length 87 [2021-12-28 01:18:44,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:44,259 INFO L470 AbstractCegarLoop]: Abstraction has 33114 states and 52150 transitions. [2021-12-28 01:18:44,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:44,259 INFO L276 IsEmpty]: Start isEmpty. Operand 33114 states and 52150 transitions. [2021-12-28 01:18:44,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-28 01:18:44,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:44,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:18:44,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:18:44,263 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1225522659, now seen corresponding path program 1 times [2021-12-28 01:18:44,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:44,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628813242] [2021-12-28 01:18:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:44,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 01:18:44,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:44,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628813242] [2021-12-28 01:18:44,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628813242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:44,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:44,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:18:44,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969546570] [2021-12-28 01:18:44,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:44,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:18:44,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:18:44,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:18:44,316 INFO L87 Difference]: Start difference. First operand 33114 states and 52150 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:48,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:48,315 INFO L93 Difference]: Finished difference Result 56648 states and 89642 transitions. [2021-12-28 01:18:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:18:48,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-28 01:18:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:48,406 INFO L225 Difference]: With dead ends: 56648 [2021-12-28 01:18:48,407 INFO L226 Difference]: Without dead ends: 46456 [2021-12-28 01:18:48,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:18:48,434 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 517 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:48,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 909 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46456 states. [2021-12-28 01:18:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46456 to 44802. [2021-12-28 01:18:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44802 states, 44801 states have (on average 1.5761701747728845) internal successors, (70614), 44801 states have internal predecessors, (70614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44802 states to 44802 states and 70614 transitions. [2021-12-28 01:18:52,439 INFO L78 Accepts]: Start accepts. Automaton has 44802 states and 70614 transitions. Word has length 87 [2021-12-28 01:18:52,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:18:52,439 INFO L470 AbstractCegarLoop]: Abstraction has 44802 states and 70614 transitions. [2021-12-28 01:18:52,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 44802 states and 70614 transitions. [2021-12-28 01:18:52,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-28 01:18:52,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:18:52,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:18:52,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:18:52,442 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:18:52,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:18:52,442 INFO L85 PathProgramCache]: Analyzing trace with hash 960026915, now seen corresponding path program 1 times [2021-12-28 01:18:52,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:18:52,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999418240] [2021-12-28 01:18:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:18:52,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:18:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:18:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 01:18:52,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:18:52,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999418240] [2021-12-28 01:18:52,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999418240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:18:52,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:18:52,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:18:52,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292212906] [2021-12-28 01:18:52,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:18:52,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:18:52,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:18:52,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:18:52,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:18:52,483 INFO L87 Difference]: Start difference. First operand 44802 states and 70614 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:18:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:18:56,737 INFO L93 Difference]: Finished difference Result 63518 states and 100702 transitions. [2021-12-28 01:18:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:18:56,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-28 01:18:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:18:56,854 INFO L225 Difference]: With dead ends: 63518 [2021-12-28 01:18:56,854 INFO L226 Difference]: Without dead ends: 53096 [2021-12-28 01:18:56,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:18:56,882 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 506 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:18:56,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 1008 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:18:56,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53096 states. [2021-12-28 01:19:01,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53096 to 51442. [2021-12-28 01:19:01,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51442 states, 51441 states have (on average 1.5791683676444859) internal successors, (81234), 51441 states have internal predecessors, (81234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:19:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51442 states to 51442 states and 81234 transitions. [2021-12-28 01:19:01,508 INFO L78 Accepts]: Start accepts. Automaton has 51442 states and 81234 transitions. Word has length 87 [2021-12-28 01:19:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:19:01,509 INFO L470 AbstractCegarLoop]: Abstraction has 51442 states and 81234 transitions. [2021-12-28 01:19:01,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:19:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 51442 states and 81234 transitions. [2021-12-28 01:19:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-28 01:19:01,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:19:01,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:19:01,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:19:01,512 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:19:01,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:19:01,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1600537049, now seen corresponding path program 1 times [2021-12-28 01:19:01,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:19:01,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304072613] [2021-12-28 01:19:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:19:01,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:19:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:19:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 01:19:01,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:19:01,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304072613] [2021-12-28 01:19:01,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304072613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:19:01,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:19:01,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:19:01,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971557621] [2021-12-28 01:19:01,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:19:01,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:19:01,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:19:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:19:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:19:01,551 INFO L87 Difference]: Start difference. First operand 51442 states and 81234 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:19:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:19:09,477 INFO L93 Difference]: Finished difference Result 113249 states and 179766 transitions. [2021-12-28 01:19:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:19:09,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-28 01:19:09,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:19:09,657 INFO L225 Difference]: With dead ends: 113249 [2021-12-28 01:19:09,657 INFO L226 Difference]: Without dead ends: 82689 [2021-12-28 01:19:09,700 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 [2021-12-28 01:19:09,703 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 103 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:19:09,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 372 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:19:09,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82689 states.