./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-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 65b8d16e4fb153ef37dd57c64863e1dd20ac9a55503c1fdc63aa83fadd0f6c16 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 01:30:27,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:30:27,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:30:27,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:30:27,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:30:27,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:30:27,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:30:27,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:30:27,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:30:27,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:30:27,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:30:27,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:30:27,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:30:27,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:30:27,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:30:27,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:30:27,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:30:27,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:30:27,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:30:27,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:30:27,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:30:27,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:30:27,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:30:27,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:30:27,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:30:27,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:30:27,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:30:27,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:30:27,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:30:27,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:30:27,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:30:27,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:30:27,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:30:27,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:30:27,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:30:27,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:30:27,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:30:27,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:30:27,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:30:27,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:30:27,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:30:27,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:30:27,990 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:30:27,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:30:27,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:30:27,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:30:27,995 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:30:27,996 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:30:27,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:30:27,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:30:27,997 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:30:27,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:30:27,998 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:30:27,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:30:27,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:30:27,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:30:27,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:30:27,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:30:27,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:30:27,999 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:30:28,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:30:28,000 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:30:28,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:30:28,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:30:28,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:30:28,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:30:28,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:30:28,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:30:28,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:30:28,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:30:28,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:30:28,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:30:28,002 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:30:28,002 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:30:28,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:30:28,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:30:28,003 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65b8d16e4fb153ef37dd57c64863e1dd20ac9a55503c1fdc63aa83fadd0f6c16 [2021-12-16 01:30:28,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:30:28,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:30:28,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:30:28,283 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:30:28,283 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:30:28,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-12-16 01:30:28,337 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f7e1af66/a96e2605632d4ec29d37555b72cdba5f/FLAG0d4365bb4 [2021-12-16 01:30:28,748 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:30:28,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-12-16 01:30:28,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f7e1af66/a96e2605632d4ec29d37555b72cdba5f/FLAG0d4365bb4 [2021-12-16 01:30:29,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f7e1af66/a96e2605632d4ec29d37555b72cdba5f [2021-12-16 01:30:29,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:30:29,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:30:29,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:30:29,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:30:29,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:30:29,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:30:29" (1/1) ... [2021-12-16 01:30:29,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5332aeeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29, skipping insertion in model container [2021-12-16 01:30:29,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:30:29" (1/1) ... [2021-12-16 01:30:29,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:30:29,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:30:29,370 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_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7182,7195] [2021-12-16 01:30:29,383 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_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[9513,9526] [2021-12-16 01:30:29,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:30:29,404 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:30:29,454 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_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7182,7195] [2021-12-16 01:30:29,466 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_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[9513,9526] [2021-12-16 01:30:29,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:30:29,497 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:30:29,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29 WrapperNode [2021-12-16 01:30:29,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:30:29,498 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:30:29,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:30:29,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:30:29,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29" (1/1) ... [2021-12-16 01:30:29,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29" (1/1) ... [2021-12-16 01:30:29,540 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 466 [2021-12-16 01:30:29,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:30:29,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:30:29,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:30:29,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:30:29,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29" (1/1) ... [2021-12-16 01:30:29,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29" (1/1) ... [2021-12-16 01:30:29,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29" (1/1) ... [2021-12-16 01:30:29,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29" (1/1) ... [2021-12-16 01:30:29,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29" (1/1) ... [2021-12-16 01:30:29,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29" (1/1) ... [2021-12-16 01:30:29,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29" (1/1) ... [2021-12-16 01:30:29,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:30:29,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:30:29,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:30:29,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:30:29,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29" (1/1) ... [2021-12-16 01:30:29,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:30:29,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:30:29,617 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) [2021-12-16 01:30:29,622 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 [2021-12-16 01:30:29,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:30:29,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:30:29,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:30:29,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:30:29,732 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:30:29,733 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:30:30,214 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:30:30,221 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:30:30,221 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-16 01:30:30,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:30:30 BoogieIcfgContainer [2021-12-16 01:30:30,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:30:30,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:30:30,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:30:30,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:30:30,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:30:29" (1/3) ... [2021-12-16 01:30:30,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa608de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:30:30, skipping insertion in model container [2021-12-16 01:30:30,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:30:29" (2/3) ... [2021-12-16 01:30:30,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa608de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:30:30, skipping insertion in model container [2021-12-16 01:30:30,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:30:30" (3/3) ... [2021-12-16 01:30:30,230 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-12-16 01:30:30,235 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:30:30,235 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 01:30:30,283 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:30:30,293 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 [2021-12-16 01:30:30,294 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 01:30:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 103 states have (on average 1.7572815533980584) internal successors, (181), 105 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 01:30:30,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:30,324 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] [2021-12-16 01:30:30,325 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:30,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1038847250, now seen corresponding path program 1 times [2021-12-16 01:30:30,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:30,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373282772] [2021-12-16 01:30:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:30,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:30,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:30,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373282772] [2021-12-16 01:30:30,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373282772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:30,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:30,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:30:30,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890487497] [2021-12-16 01:30:30,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:30,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:30:30,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:30,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:30:30,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:30:30,728 INFO L87 Difference]: Start difference. First operand has 106 states, 103 states have (on average 1.7572815533980584) internal successors, (181), 105 states have internal predecessors, (181), 0 states have call successors, (0), 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 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:30,935 INFO L93 Difference]: Finished difference Result 416 states and 663 transitions. [2021-12-16 01:30:30,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 01:30:30,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-16 01:30:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:30,949 INFO L225 Difference]: With dead ends: 416 [2021-12-16 01:30:30,950 INFO L226 Difference]: Without dead ends: 353 [2021-12-16 01:30:30,953 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 [2021-12-16 01:30:30,956 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 596 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:30,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 768 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:30:30,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-16 01:30:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 155. [2021-12-16 01:30:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.4313725490196079) internal successors, (219), 154 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 219 transitions. [2021-12-16 01:30:31,020 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 219 transitions. Word has length 48 [2021-12-16 01:30:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:31,021 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 219 transitions. [2021-12-16 01:30:31,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 219 transitions. [2021-12-16 01:30:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 01:30:31,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:31,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:30:31,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:30:31,023 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:31,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1964840261, now seen corresponding path program 1 times [2021-12-16 01:30:31,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:31,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517853745] [2021-12-16 01:30:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:31,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:31,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:31,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517853745] [2021-12-16 01:30:31,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517853745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:31,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:31,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:30:31,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421399085] [2021-12-16 01:30:31,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:31,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:30:31,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:31,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:30:31,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:30:31,137 INFO L87 Difference]: Start difference. First operand 155 states and 219 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:31,186 INFO L93 Difference]: Finished difference Result 244 states and 352 transitions. [2021-12-16 01:30:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:30:31,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-16 01:30:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:31,190 INFO L225 Difference]: With dead ends: 244 [2021-12-16 01:30:31,191 INFO L226 Difference]: Without dead ends: 159 [2021-12-16 01:30:31,191 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 [2021-12-16 01:30:31,196 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 73 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:31,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 301 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:30:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-16 01:30:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2021-12-16 01:30:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 155 states have (on average 1.4193548387096775) internal successors, (220), 156 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 220 transitions. [2021-12-16 01:30:31,216 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 220 transitions. Word has length 49 [2021-12-16 01:30:31,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:31,217 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 220 transitions. [2021-12-16 01:30:31,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 220 transitions. [2021-12-16 01:30:31,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 01:30:31,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:31,220 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] [2021-12-16 01:30:31,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:30:31,221 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:31,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1398279763, now seen corresponding path program 1 times [2021-12-16 01:30:31,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:31,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616145592] [2021-12-16 01:30:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:31,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:31,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:31,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616145592] [2021-12-16 01:30:31,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616145592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:31,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:31,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:30:31,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31999671] [2021-12-16 01:30:31,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:31,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:30:31,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:31,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:30:31,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:30:31,351 INFO L87 Difference]: Start difference. First operand 157 states and 220 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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) [2021-12-16 01:30:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:31,467 INFO L93 Difference]: Finished difference Result 470 states and 690 transitions. [2021-12-16 01:30:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:30:31,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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 [2021-12-16 01:30:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:31,470 INFO L225 Difference]: With dead ends: 470 [2021-12-16 01:30:31,470 INFO L226 Difference]: Without dead ends: 388 [2021-12-16 01:30:31,474 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 [2021-12-16 01:30:31,477 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 293 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:31,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 598 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:30:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-12-16 01:30:31,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 248. [2021-12-16 01:30:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 246 states have (on average 1.4593495934959348) internal successors, (359), 247 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 359 transitions. [2021-12-16 01:30:31,516 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 359 transitions. Word has length 50 [2021-12-16 01:30:31,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:31,516 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 359 transitions. [2021-12-16 01:30:31,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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) [2021-12-16 01:30:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 359 transitions. [2021-12-16 01:30:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 01:30:31,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:31,518 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] [2021-12-16 01:30:31,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 01:30:31,518 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:31,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:31,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1526101883, now seen corresponding path program 1 times [2021-12-16 01:30:31,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:31,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038383853] [2021-12-16 01:30:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:31,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:31,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:31,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038383853] [2021-12-16 01:30:31,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038383853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:31,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:31,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:30:31,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655656035] [2021-12-16 01:30:31,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:31,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:30:31,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:31,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:30:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:30:31,597 INFO L87 Difference]: Start difference. First operand 248 states and 359 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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) [2021-12-16 01:30:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:31,686 INFO L93 Difference]: Finished difference Result 556 states and 821 transitions. [2021-12-16 01:30:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:30:31,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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 [2021-12-16 01:30:31,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:31,689 INFO L225 Difference]: With dead ends: 556 [2021-12-16 01:30:31,689 INFO L226 Difference]: Without dead ends: 474 [2021-12-16 01:30:31,702 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 [2021-12-16 01:30:31,711 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 357 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:31,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 537 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:30:31,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-12-16 01:30:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 376. [2021-12-16 01:30:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 374 states have (on average 1.4786096256684491) internal successors, (553), 375 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:31,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 553 transitions. [2021-12-16 01:30:31,736 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 553 transitions. Word has length 50 [2021-12-16 01:30:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:31,737 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 553 transitions. [2021-12-16 01:30:31,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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) [2021-12-16 01:30:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 553 transitions. [2021-12-16 01:30:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 01:30:31,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:31,741 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] [2021-12-16 01:30:31,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 01:30:31,741 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:31,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:31,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2031133031, now seen corresponding path program 1 times [2021-12-16 01:30:31,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:31,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848069142] [2021-12-16 01:30:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:31,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:31,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:31,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848069142] [2021-12-16 01:30:31,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848069142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:31,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:31,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 01:30:31,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227777762] [2021-12-16 01:30:31,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:31,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:30:31,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:31,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:30:31,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:30:31,818 INFO L87 Difference]: Start difference. First operand 376 states and 553 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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) [2021-12-16 01:30:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:31,922 INFO L93 Difference]: Finished difference Result 647 states and 960 transitions. [2021-12-16 01:30:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:30:31,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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 [2021-12-16 01:30:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:31,927 INFO L225 Difference]: With dead ends: 647 [2021-12-16 01:30:31,927 INFO L226 Difference]: Without dead ends: 565 [2021-12-16 01:30:31,929 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 [2021-12-16 01:30:31,929 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 356 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:31,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 571 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:30:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-16 01:30:31,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 467. [2021-12-16 01:30:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 465 states have (on average 1.4881720430107528) internal successors, (692), 466 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 692 transitions. [2021-12-16 01:30:31,954 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 692 transitions. Word has length 50 [2021-12-16 01:30:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:31,957 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 692 transitions. [2021-12-16 01:30:31,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 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) [2021-12-16 01:30:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 692 transitions. [2021-12-16 01:30:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 01:30:31,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:31,961 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] [2021-12-16 01:30:31,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 01:30:31,961 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:31,967 INFO L85 PathProgramCache]: Analyzing trace with hash 222346276, now seen corresponding path program 1 times [2021-12-16 01:30:31,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:31,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519459306] [2021-12-16 01:30:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:31,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:32,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:32,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519459306] [2021-12-16 01:30:32,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519459306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:32,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:32,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:30:32,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169567627] [2021-12-16 01:30:32,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:32,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:30:32,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:32,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:30:32,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:30:32,040 INFO L87 Difference]: Start difference. First operand 467 states and 692 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:32,138 INFO L93 Difference]: Finished difference Result 907 states and 1355 transitions. [2021-12-16 01:30:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:30:32,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-16 01:30:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:32,141 INFO L225 Difference]: With dead ends: 907 [2021-12-16 01:30:32,141 INFO L226 Difference]: Without dead ends: 467 [2021-12-16 01:30:32,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:30:32,143 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 365 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:32,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 88 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:30:32,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-16 01:30:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2021-12-16 01:30:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 465 states have (on average 1.4666666666666666) internal successors, (682), 466 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 682 transitions. [2021-12-16 01:30:32,169 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 682 transitions. Word has length 51 [2021-12-16 01:30:32,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:32,169 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 682 transitions. [2021-12-16 01:30:32,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 682 transitions. [2021-12-16 01:30:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 01:30:32,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:32,171 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] [2021-12-16 01:30:32,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 01:30:32,171 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:32,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:32,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1710441536, now seen corresponding path program 1 times [2021-12-16 01:30:32,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:32,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736864553] [2021-12-16 01:30:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:32,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:32,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:32,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736864553] [2021-12-16 01:30:32,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736864553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:32,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:32,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:30:32,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815575769] [2021-12-16 01:30:32,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:32,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:30:32,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:32,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:30:32,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:30:32,218 INFO L87 Difference]: Start difference. First operand 467 states and 682 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 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) [2021-12-16 01:30:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:32,387 INFO L93 Difference]: Finished difference Result 1315 states and 1944 transitions. [2021-12-16 01:30:32,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:30:32,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 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 [2021-12-16 01:30:32,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:32,392 INFO L225 Difference]: With dead ends: 1315 [2021-12-16 01:30:32,392 INFO L226 Difference]: Without dead ends: 871 [2021-12-16 01:30:32,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:30:32,395 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 544 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:32,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 133 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:30:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-12-16 01:30:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 866. [2021-12-16 01:30:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 864 states have (on average 1.4733796296296295) internal successors, (1273), 865 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1273 transitions. [2021-12-16 01:30:32,453 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1273 transitions. Word has length 52 [2021-12-16 01:30:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:32,453 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1273 transitions. [2021-12-16 01:30:32,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 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) [2021-12-16 01:30:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1273 transitions. [2021-12-16 01:30:32,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 01:30:32,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:32,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:30:32,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 01:30:32,455 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash 549255064, now seen corresponding path program 1 times [2021-12-16 01:30:32,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:32,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836751593] [2021-12-16 01:30:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:32,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:32,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:32,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836751593] [2021-12-16 01:30:32,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836751593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:32,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:32,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:30:32,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801919404] [2021-12-16 01:30:32,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:32,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 01:30:32,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:32,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 01:30:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:30:32,532 INFO L87 Difference]: Start difference. First operand 866 states and 1273 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:32,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:32,653 INFO L93 Difference]: Finished difference Result 1701 states and 2514 transitions. [2021-12-16 01:30:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:30:32,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-16 01:30:32,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:32,659 INFO L225 Difference]: With dead ends: 1701 [2021-12-16 01:30:32,659 INFO L226 Difference]: Without dead ends: 866 [2021-12-16 01:30:32,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:30:32,660 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 343 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:32,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 96 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:30:32,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-12-16 01:30:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2021-12-16 01:30:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 864 states have (on average 1.4513888888888888) internal successors, (1254), 865 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1254 transitions. [2021-12-16 01:30:32,714 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1254 transitions. Word has length 53 [2021-12-16 01:30:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:32,714 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1254 transitions. [2021-12-16 01:30:32,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1254 transitions. [2021-12-16 01:30:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-16 01:30:32,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:32,716 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] [2021-12-16 01:30:32,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 01:30:32,717 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:32,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:32,717 INFO L85 PathProgramCache]: Analyzing trace with hash -680909608, now seen corresponding path program 1 times [2021-12-16 01:30:32,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:32,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236476453] [2021-12-16 01:30:32,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:32,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:32,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:32,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236476453] [2021-12-16 01:30:32,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236476453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:32,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:32,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-16 01:30:32,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743449110] [2021-12-16 01:30:32,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:32,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 01:30:32,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 01:30:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-16 01:30:32,990 INFO L87 Difference]: Start difference. First operand 866 states and 1254 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-12-16 01:30:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:33,605 INFO L93 Difference]: Finished difference Result 2439 states and 3544 transitions. [2021-12-16 01:30:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:30:33,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 [2021-12-16 01:30:33,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:33,612 INFO L225 Difference]: With dead ends: 2439 [2021-12-16 01:30:33,612 INFO L226 Difference]: Without dead ends: 1678 [2021-12-16 01:30:33,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-16 01:30:33,616 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 803 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:33,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 314 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 01:30:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-12-16 01:30:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 866. [2021-12-16 01:30:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 864 states have (on average 1.4444444444444444) internal successors, (1248), 865 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1248 transitions. [2021-12-16 01:30:33,692 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1248 transitions. Word has length 54 [2021-12-16 01:30:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:33,692 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1248 transitions. [2021-12-16 01:30:33,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-12-16 01:30:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1248 transitions. [2021-12-16 01:30:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-16 01:30:33,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:33,693 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] [2021-12-16 01:30:33,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 01:30:33,694 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:33,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:33,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1013391184, now seen corresponding path program 1 times [2021-12-16 01:30:33,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:33,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550655596] [2021-12-16 01:30:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:33,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:33,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:33,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550655596] [2021-12-16 01:30:33,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550655596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:33,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:33,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-16 01:30:33,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763825545] [2021-12-16 01:30:33,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:33,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 01:30:33,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:33,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 01:30:33,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-16 01:30:33,917 INFO L87 Difference]: Start difference. First operand 866 states and 1248 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-12-16 01:30:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:34,443 INFO L93 Difference]: Finished difference Result 2082 states and 3004 transitions. [2021-12-16 01:30:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 01:30:34,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 [2021-12-16 01:30:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:34,449 INFO L225 Difference]: With dead ends: 2082 [2021-12-16 01:30:34,449 INFO L226 Difference]: Without dead ends: 1306 [2021-12-16 01:30:34,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-16 01:30:34,451 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 742 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:34,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 365 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 01:30:34,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-12-16 01:30:34,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 866. [2021-12-16 01:30:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 864 states have (on average 1.4409722222222223) internal successors, (1245), 865 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1245 transitions. [2021-12-16 01:30:34,531 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1245 transitions. Word has length 54 [2021-12-16 01:30:34,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:34,531 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1245 transitions. [2021-12-16 01:30:34,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-12-16 01:30:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1245 transitions. [2021-12-16 01:30:34,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 01:30:34,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:34,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:30:34,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 01:30:34,533 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:34,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:34,534 INFO L85 PathProgramCache]: Analyzing trace with hash -555052982, now seen corresponding path program 1 times [2021-12-16 01:30:34,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:34,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591032531] [2021-12-16 01:30:34,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:34,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:34,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:34,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591032531] [2021-12-16 01:30:34,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591032531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:34,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:34,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 01:30:34,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561585970] [2021-12-16 01:30:34,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:34,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 01:30:34,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 01:30:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:30:34,667 INFO L87 Difference]: Start difference. First operand 866 states and 1245 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:35,108 INFO L93 Difference]: Finished difference Result 2391 states and 3483 transitions. [2021-12-16 01:30:35,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:30:35,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-16 01:30:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:35,115 INFO L225 Difference]: With dead ends: 2391 [2021-12-16 01:30:35,115 INFO L226 Difference]: Without dead ends: 1627 [2021-12-16 01:30:35,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-12-16 01:30:35,117 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 554 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:35,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 309 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:30:35,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-12-16 01:30:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 866. [2021-12-16 01:30:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 864 states have (on average 1.4398148148148149) internal successors, (1244), 865 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1244 transitions. [2021-12-16 01:30:35,219 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1244 transitions. Word has length 55 [2021-12-16 01:30:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:35,219 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1244 transitions. [2021-12-16 01:30:35,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1244 transitions. [2021-12-16 01:30:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-16 01:30:35,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:35,220 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] [2021-12-16 01:30:35,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 01:30:35,221 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:35,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2014195720, now seen corresponding path program 1 times [2021-12-16 01:30:35,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:35,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120489840] [2021-12-16 01:30:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:35,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:35,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:35,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120489840] [2021-12-16 01:30:35,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120489840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:35,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:35,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-16 01:30:35,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182364898] [2021-12-16 01:30:35,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:35,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 01:30:35,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 01:30:35,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-16 01:30:35,521 INFO L87 Difference]: Start difference. First operand 866 states and 1244 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 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) [2021-12-16 01:30:36,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:36,836 INFO L93 Difference]: Finished difference Result 3396 states and 4981 transitions. [2021-12-16 01:30:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 01:30:36,837 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 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 [2021-12-16 01:30:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:36,847 INFO L225 Difference]: With dead ends: 3396 [2021-12-16 01:30:36,848 INFO L226 Difference]: Without dead ends: 3044 [2021-12-16 01:30:36,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-12-16 01:30:36,850 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 965 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:36,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 937 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 01:30:36,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2021-12-16 01:30:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 845. [2021-12-16 01:30:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 843 states have (on average 1.4412811387900355) internal successors, (1215), 844 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1215 transitions. [2021-12-16 01:30:36,999 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1215 transitions. Word has length 56 [2021-12-16 01:30:37,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:37,000 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1215 transitions. [2021-12-16 01:30:37,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 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) [2021-12-16 01:30:37,001 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1215 transitions. [2021-12-16 01:30:37,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-16 01:30:37,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:37,004 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] [2021-12-16 01:30:37,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 01:30:37,004 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:37,005 INFO L85 PathProgramCache]: Analyzing trace with hash 929811098, now seen corresponding path program 1 times [2021-12-16 01:30:37,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:37,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544772487] [2021-12-16 01:30:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:37,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:37,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:37,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544772487] [2021-12-16 01:30:37,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544772487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:37,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:37,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 01:30:37,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568971937] [2021-12-16 01:30:37,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:37,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 01:30:37,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:37,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 01:30:37,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-12-16 01:30:37,361 INFO L87 Difference]: Start difference. First operand 845 states and 1215 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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) [2021-12-16 01:30:39,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:39,027 INFO L93 Difference]: Finished difference Result 3400 states and 4982 transitions. [2021-12-16 01:30:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 01:30:39,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 [2021-12-16 01:30:39,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:39,038 INFO L225 Difference]: With dead ends: 3400 [2021-12-16 01:30:39,038 INFO L226 Difference]: Without dead ends: 2651 [2021-12-16 01:30:39,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 01:30:39,041 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 401 mSDsluCounter, 2410 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 2611 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:39,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 2611 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 01:30:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-12-16 01:30:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 844. [2021-12-16 01:30:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.4370546318289785) internal successors, (1210), 843 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1210 transitions. [2021-12-16 01:30:39,177 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1210 transitions. Word has length 56 [2021-12-16 01:30:39,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:39,177 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1210 transitions. [2021-12-16 01:30:39,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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) [2021-12-16 01:30:39,178 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1210 transitions. [2021-12-16 01:30:39,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 01:30:39,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:39,178 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] [2021-12-16 01:30:39,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 01:30:39,179 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:39,179 INFO L85 PathProgramCache]: Analyzing trace with hash 788720349, now seen corresponding path program 1 times [2021-12-16 01:30:39,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:39,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649811529] [2021-12-16 01:30:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:39,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:39,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:39,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649811529] [2021-12-16 01:30:39,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649811529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:39,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:39,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-16 01:30:39,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789244205] [2021-12-16 01:30:39,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:39,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 01:30:39,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:39,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 01:30:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-16 01:30:39,749 INFO L87 Difference]: Start difference. First operand 844 states and 1210 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2021-12-16 01:30:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:41,491 INFO L93 Difference]: Finished difference Result 2570 states and 3758 transitions. [2021-12-16 01:30:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 01:30:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 [2021-12-16 01:30:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:41,499 INFO L225 Difference]: With dead ends: 2570 [2021-12-16 01:30:41,499 INFO L226 Difference]: Without dead ends: 2233 [2021-12-16 01:30:41,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2021-12-16 01:30:41,501 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 412 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1908 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:41,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 1908 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 01:30:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-12-16 01:30:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 838. [2021-12-16 01:30:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 836 states have (on average 1.4354066985645932) internal successors, (1200), 837 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1200 transitions. [2021-12-16 01:30:41,633 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1200 transitions. Word has length 57 [2021-12-16 01:30:41,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:41,633 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 1200 transitions. [2021-12-16 01:30:41,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2021-12-16 01:30:41,633 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1200 transitions. [2021-12-16 01:30:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 01:30:41,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:41,634 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] [2021-12-16 01:30:41,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 01:30:41,634 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:41,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1168073188, now seen corresponding path program 1 times [2021-12-16 01:30:41,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:41,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368069907] [2021-12-16 01:30:41,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:41,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:41,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:42,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:42,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368069907] [2021-12-16 01:30:42,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368069907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:42,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:42,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-16 01:30:42,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476694224] [2021-12-16 01:30:42,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:42,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 01:30:42,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:42,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 01:30:42,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-16 01:30:42,039 INFO L87 Difference]: Start difference. First operand 838 states and 1200 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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) [2021-12-16 01:30:44,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:44,835 INFO L93 Difference]: Finished difference Result 8177 states and 12069 transitions. [2021-12-16 01:30:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 01:30:44,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 [2021-12-16 01:30:44,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:44,860 INFO L225 Difference]: With dead ends: 8177 [2021-12-16 01:30:44,860 INFO L226 Difference]: Without dead ends: 7846 [2021-12-16 01:30:44,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=314, Invalid=1168, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 01:30:44,863 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 1663 mSDsluCounter, 2750 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1663 SdHoareTripleChecker+Valid, 3061 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:44,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1663 Valid, 3061 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 01:30:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7846 states. [2021-12-16 01:30:45,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7846 to 843. [2021-12-16 01:30:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 841 states have (on average 1.4340071343638525) internal successors, (1206), 842 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1206 transitions. [2021-12-16 01:30:45,083 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1206 transitions. Word has length 57 [2021-12-16 01:30:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:45,084 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1206 transitions. [2021-12-16 01:30:45,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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) [2021-12-16 01:30:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1206 transitions. [2021-12-16 01:30:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 01:30:45,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:45,085 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] [2021-12-16 01:30:45,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 01:30:45,085 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash 506033409, now seen corresponding path program 1 times [2021-12-16 01:30:45,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:45,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916960867] [2021-12-16 01:30:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:45,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:45,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:45,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916960867] [2021-12-16 01:30:45,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916960867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:45,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:45,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-16 01:30:45,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799069249] [2021-12-16 01:30:45,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:45,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 01:30:45,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:45,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 01:30:45,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-16 01:30:45,411 INFO L87 Difference]: Start difference. First operand 843 states and 1206 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 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) [2021-12-16 01:30:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:46,465 INFO L93 Difference]: Finished difference Result 2624 states and 3843 transitions. [2021-12-16 01:30:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 01:30:46,465 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 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 [2021-12-16 01:30:46,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:46,475 INFO L225 Difference]: With dead ends: 2624 [2021-12-16 01:30:46,475 INFO L226 Difference]: Without dead ends: 2277 [2021-12-16 01:30:46,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-12-16 01:30:46,476 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 655 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:46,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 1220 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 01:30:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-12-16 01:30:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 821. [2021-12-16 01:30:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 819 states have (on average 1.4407814407814408) internal successors, (1180), 820 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1180 transitions. [2021-12-16 01:30:46,673 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1180 transitions. Word has length 57 [2021-12-16 01:30:46,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:46,674 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1180 transitions. [2021-12-16 01:30:46,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 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) [2021-12-16 01:30:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1180 transitions. [2021-12-16 01:30:46,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 01:30:46,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:46,675 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] [2021-12-16 01:30:46,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 01:30:46,675 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:46,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1010808515, now seen corresponding path program 1 times [2021-12-16 01:30:46,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:46,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208620336] [2021-12-16 01:30:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:46,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:47,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:47,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208620336] [2021-12-16 01:30:47,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208620336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:47,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:47,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-16 01:30:47,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548292799] [2021-12-16 01:30:47,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:47,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 01:30:47,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:47,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 01:30:47,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-12-16 01:30:47,216 INFO L87 Difference]: Start difference. First operand 821 states and 1180 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2021-12-16 01:30:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:49,264 INFO L93 Difference]: Finished difference Result 4055 states and 5971 transitions. [2021-12-16 01:30:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 01:30:49,264 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 [2021-12-16 01:30:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:49,273 INFO L225 Difference]: With dead ends: 4055 [2021-12-16 01:30:49,274 INFO L226 Difference]: Without dead ends: 3718 [2021-12-16 01:30:49,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 01:30:49,276 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 522 mSDsluCounter, 2414 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 2620 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:49,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 2620 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 01:30:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-12-16 01:30:49,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 800. [2021-12-16 01:30:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 1.4455569461827285) internal successors, (1155), 799 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1155 transitions. [2021-12-16 01:30:49,508 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1155 transitions. Word has length 57 [2021-12-16 01:30:49,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:49,508 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1155 transitions. [2021-12-16 01:30:49,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2021-12-16 01:30:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1155 transitions. [2021-12-16 01:30:49,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 01:30:49,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:49,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:30:49,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 01:30:49,510 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:49,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:49,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2101821275, now seen corresponding path program 1 times [2021-12-16 01:30:49,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:49,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499671368] [2021-12-16 01:30:49,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:49,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:49,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:49,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499671368] [2021-12-16 01:30:49,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499671368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:49,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:49,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:30:49,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042182018] [2021-12-16 01:30:49,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:49,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:30:49,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:49,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:30:49,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:30:49,542 INFO L87 Difference]: Start difference. First operand 800 states and 1155 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-12-16 01:30:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:49,821 INFO L93 Difference]: Finished difference Result 2128 states and 3105 transitions. [2021-12-16 01:30:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:30:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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 77 [2021-12-16 01:30:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:49,824 INFO L225 Difference]: With dead ends: 2128 [2021-12-16 01:30:49,824 INFO L226 Difference]: Without dead ends: 1406 [2021-12-16 01:30:49,825 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 [2021-12-16 01:30:49,825 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 50 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:49,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 279 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:30:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2021-12-16 01:30:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1404. [2021-12-16 01:30:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 1.4226657163221668) internal successors, (1996), 1403 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1996 transitions. [2021-12-16 01:30:50,104 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1996 transitions. Word has length 77 [2021-12-16 01:30:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:50,104 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 1996 transitions. [2021-12-16 01:30:50,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-12-16 01:30:50,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1996 transitions. [2021-12-16 01:30:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-16 01:30:50,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:50,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:30:50,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 01:30:50,106 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:50,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:50,107 INFO L85 PathProgramCache]: Analyzing trace with hash -250137055, now seen corresponding path program 1 times [2021-12-16 01:30:50,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:50,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349827723] [2021-12-16 01:30:50,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:50,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:50,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:50,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349827723] [2021-12-16 01:30:50,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349827723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:50,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:50,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:30:50,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276599809] [2021-12-16 01:30:50,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:50,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:30:50,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:30:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:30:50,143 INFO L87 Difference]: Start difference. First operand 1404 states and 1996 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:50,597 INFO L93 Difference]: Finished difference Result 3570 states and 5100 transitions. [2021-12-16 01:30:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:30:50,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-16 01:30:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:50,601 INFO L225 Difference]: With dead ends: 3570 [2021-12-16 01:30:50,601 INFO L226 Difference]: Without dead ends: 2244 [2021-12-16 01:30:50,603 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 [2021-12-16 01:30:50,604 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 56 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:50,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 265 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:30:50,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-12-16 01:30:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2098. [2021-12-16 01:30:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 1.407725321888412) internal successors, (2952), 2097 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2952 transitions. [2021-12-16 01:30:51,070 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2952 transitions. Word has length 78 [2021-12-16 01:30:51,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:51,070 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 2952 transitions. [2021-12-16 01:30:51,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:51,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2952 transitions. [2021-12-16 01:30:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 01:30:51,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:51,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:30:51,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 01:30:51,072 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:51,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2109225064, now seen corresponding path program 1 times [2021-12-16 01:30:51,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:51,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869549563] [2021-12-16 01:30:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:51,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:51,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:51,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869549563] [2021-12-16 01:30:51,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869549563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:51,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:51,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 01:30:51,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720337033] [2021-12-16 01:30:51,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:51,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:30:51,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:51,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:30:51,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 01:30:51,107 INFO L87 Difference]: Start difference. First operand 2098 states and 2952 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:52,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:52,013 INFO L93 Difference]: Finished difference Result 5485 states and 7734 transitions. [2021-12-16 01:30:52,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:30:52,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-16 01:30:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:52,020 INFO L225 Difference]: With dead ends: 5485 [2021-12-16 01:30:52,021 INFO L226 Difference]: Without dead ends: 3465 [2021-12-16 01:30:52,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 01:30:52,025 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 221 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:52,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 158 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 01:30:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2021-12-16 01:30:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 2068. [2021-12-16 01:30:52,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 1.4044508950169328) internal successors, (2903), 2067 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 2903 transitions. [2021-12-16 01:30:52,533 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 2903 transitions. Word has length 79 [2021-12-16 01:30:52,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:52,533 INFO L470 AbstractCegarLoop]: Abstraction has 2068 states and 2903 transitions. [2021-12-16 01:30:52,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:52,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 2903 transitions. [2021-12-16 01:30:52,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 01:30:52,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:52,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:30:52,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 01:30:52,535 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:52,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1135261955, now seen corresponding path program 1 times [2021-12-16 01:30:52,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:52,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190675715] [2021-12-16 01:30:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:52,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:52,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:52,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190675715] [2021-12-16 01:30:52,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190675715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:52,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:52,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:30:52,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20538160] [2021-12-16 01:30:52,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:52,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:30:52,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:52,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:30:52,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:30:52,574 INFO L87 Difference]: Start difference. First operand 2068 states and 2903 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:53,554 INFO L93 Difference]: Finished difference Result 5856 states and 8191 transitions. [2021-12-16 01:30:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:30:53,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-16 01:30:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:53,561 INFO L225 Difference]: With dead ends: 5856 [2021-12-16 01:30:53,561 INFO L226 Difference]: Without dead ends: 3854 [2021-12-16 01:30:53,563 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 [2021-12-16 01:30:53,564 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 49 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:53,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 263 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:30:53,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2021-12-16 01:30:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 3636. [2021-12-16 01:30:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 1.3845942228335626) internal successors, (5033), 3635 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 5033 transitions. [2021-12-16 01:30:54,396 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 5033 transitions. Word has length 79 [2021-12-16 01:30:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:54,397 INFO L470 AbstractCegarLoop]: Abstraction has 3636 states and 5033 transitions. [2021-12-16 01:30:54,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:54,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 5033 transitions. [2021-12-16 01:30:54,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 01:30:54,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:54,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:30:54,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 01:30:54,397 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:54,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1028835832, now seen corresponding path program 1 times [2021-12-16 01:30:54,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:54,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420803578] [2021-12-16 01:30:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:54,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:54,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:54,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420803578] [2021-12-16 01:30:54,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420803578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:54,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:54,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:30:54,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091295179] [2021-12-16 01:30:54,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:54,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:30:54,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:54,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:30:54,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:30:54,448 INFO L87 Difference]: Start difference. First operand 3636 states and 5033 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:30:56,089 INFO L93 Difference]: Finished difference Result 10344 states and 14203 transitions. [2021-12-16 01:30:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:30:56,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-16 01:30:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:30:56,100 INFO L225 Difference]: With dead ends: 10344 [2021-12-16 01:30:56,100 INFO L226 Difference]: Without dead ends: 6774 [2021-12-16 01:30:56,105 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 [2021-12-16 01:30:56,106 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 42 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:30:56,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 260 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:30:56,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6774 states. [2021-12-16 01:30:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6774 to 6340. [2021-12-16 01:30:57,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 6339 states have (on average 1.3552610821896198) internal successors, (8591), 6339 states have internal predecessors, (8591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 8591 transitions. [2021-12-16 01:30:57,650 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 8591 transitions. Word has length 80 [2021-12-16 01:30:57,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:30:57,650 INFO L470 AbstractCegarLoop]: Abstraction has 6340 states and 8591 transitions. [2021-12-16 01:30:57,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:30:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 8591 transitions. [2021-12-16 01:30:57,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 01:30:57,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:30:57,651 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:30:57,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-16 01:30:57,651 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:30:57,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:30:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1675906608, now seen corresponding path program 1 times [2021-12-16 01:30:57,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:30:57,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917136785] [2021-12-16 01:30:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:30:57,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:30:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:30:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:30:57,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:30:57,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917136785] [2021-12-16 01:30:57,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917136785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:30:57,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:30:57,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 01:30:57,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176830771] [2021-12-16 01:30:57,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:30:57,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:30:57,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:30:57,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:30:57,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:30:57,705 INFO L87 Difference]: Start difference. First operand 6340 states and 8591 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:31:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:31:00,135 INFO L93 Difference]: Finished difference Result 9917 states and 13346 transitions. [2021-12-16 01:31:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 01:31:00,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-16 01:31:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:31:00,151 INFO L225 Difference]: With dead ends: 9917 [2021-12-16 01:31:00,151 INFO L226 Difference]: Without dead ends: 9915 [2021-12-16 01:31:00,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:31:00,154 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 194 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:31:00,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 625 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:31:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9915 states. [2021-12-16 01:31:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9915 to 6532. [2021-12-16 01:31:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6532 states, 6531 states have (on average 1.3325677537896188) internal successors, (8703), 6531 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:31:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6532 states to 6532 states and 8703 transitions. [2021-12-16 01:31:01,803 INFO L78 Accepts]: Start accepts. Automaton has 6532 states and 8703 transitions. Word has length 81 [2021-12-16 01:31:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:31:01,803 INFO L470 AbstractCegarLoop]: Abstraction has 6532 states and 8703 transitions. [2021-12-16 01:31:01,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:31:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6532 states and 8703 transitions. [2021-12-16 01:31:01,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 01:31:01,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:31:01,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:31:01,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-16 01:31:01,804 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:31:01,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:31:01,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1770826604, now seen corresponding path program 1 times [2021-12-16 01:31:01,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:31:01,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319490422] [2021-12-16 01:31:01,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:31:01,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:31:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:31:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:31:01,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:31:01,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319490422] [2021-12-16 01:31:01,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319490422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:31:01,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:31:01,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:31:01,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007277998] [2021-12-16 01:31:01,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:31:01,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:31:01,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:31:01,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:31:01,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:31:01,834 INFO L87 Difference]: Start difference. First operand 6532 states and 8703 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:31:03,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:31:03,402 INFO L93 Difference]: Finished difference Result 13244 states and 17669 transitions. [2021-12-16 01:31:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:31:03,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-16 01:31:03,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:31:03,410 INFO L225 Difference]: With dead ends: 13244 [2021-12-16 01:31:03,410 INFO L226 Difference]: Without dead ends: 6778 [2021-12-16 01:31:03,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:31:03,415 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 68 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:31:03,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 210 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:31:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6778 states. [2021-12-16 01:31:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6778 to 6776. [2021-12-16 01:31:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6776 states, 6775 states have (on average 1.3111439114391144) internal successors, (8883), 6775 states have internal predecessors, (8883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:31:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6776 states to 6776 states and 8883 transitions. [2021-12-16 01:31:05,114 INFO L78 Accepts]: Start accepts. Automaton has 6776 states and 8883 transitions. Word has length 81 [2021-12-16 01:31:05,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:31:05,114 INFO L470 AbstractCegarLoop]: Abstraction has 6776 states and 8883 transitions. [2021-12-16 01:31:05,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 01:31:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6776 states and 8883 transitions. [2021-12-16 01:31:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-16 01:31:05,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:31:05,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:31:05,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-16 01:31:05,116 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:31:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:31:05,117 INFO L85 PathProgramCache]: Analyzing trace with hash 25959401, now seen corresponding path program 1 times [2021-12-16 01:31:05,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:31:05,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850440081] [2021-12-16 01:31:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:31:05,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:31:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:31:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 01:31:05,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:31:05,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850440081] [2021-12-16 01:31:05,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850440081] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:31:05,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342086896] [2021-12-16 01:31:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:31:05,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:31:05,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:31:05,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 01:31:05,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 01:31:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:31:05,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 01:31:05,440 INFO L286 TraceCheckSpWp]: Computing forward predicates...