./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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.ufo.UNBOUNDED.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 74d57b3f1e9a386b0ff6bac396d798184771ae1b1b0bb917f750fc3ebefb1c2f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:09:39,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:09:39,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:09:39,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:09:39,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:09:39,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:09:39,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:09:39,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:09:39,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:09:39,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:09:39,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:09:39,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:09:39,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:09:39,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:09:39,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:09:39,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:09:39,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:09:39,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:09:39,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:09:39,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:09:39,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:09:39,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:09:39,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:09:39,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:09:39,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:09:39,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:09:39,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:09:39,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:09:39,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:09:39,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:09:39,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:09:39,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:09:39,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:09:39,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:09:39,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:09:39,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:09:39,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:09:39,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:09:39,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:09:39,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:09:39,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:09:39,652 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:09:39,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:09:39,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:09:39,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:09:39,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:09:39,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:09:39,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:09:39,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:09:39,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:09:39,689 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:09:39,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:09:39,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:09:39,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:09:39,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:09:39,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:09:39,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:09:39,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:09:39,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:09:39,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:09:39,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:09:39,692 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:09:39,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:09:39,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:09:39,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:09:39,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:09:39,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:09:39,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:09:39,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:09:39,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:09:39,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:09:39,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:09:39,694 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:09:39,694 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:09:39,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:09:39,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:09:39,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74d57b3f1e9a386b0ff6bac396d798184771ae1b1b0bb917f750fc3ebefb1c2f [2021-12-22 12:09:39,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:09:39,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:09:39,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:09:39,954 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:09:39,955 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:09:39,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-22 12:09:40,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8cd392d7/77a11493b2e14f5785f128b17d9af014/FLAG9ac572e29 [2021-12-22 12:09:40,440 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:09:40,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-22 12:09:40,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8cd392d7/77a11493b2e14f5785f128b17d9af014/FLAG9ac572e29 [2021-12-22 12:09:40,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8cd392d7/77a11493b2e14f5785f128b17d9af014 [2021-12-22 12:09:40,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:09:40,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:09:40,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:09:40,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:09:40,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:09:40,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:09:40" (1/1) ... [2021-12-22 12:09:40,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fd83306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40, skipping insertion in model container [2021-12-22 12:09:40,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:09:40" (1/1) ... [2021-12-22 12:09:40,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:09:40,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:09:40,746 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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6874,6887] [2021-12-22 12:09:40,761 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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9049,9062] [2021-12-22 12:09:40,774 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:09:40,792 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:09:40,855 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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6874,6887] [2021-12-22 12:09:40,867 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.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9049,9062] [2021-12-22 12:09:40,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:09:40,889 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:09:40,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40 WrapperNode [2021-12-22 12:09:40,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:09:40,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:09:40,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:09:40,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:09:40,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40" (1/1) ... [2021-12-22 12:09:40,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40" (1/1) ... [2021-12-22 12:09:40,959 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 445 [2021-12-22 12:09:40,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:09:40,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:09:40,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:09:40,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:09:40,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40" (1/1) ... [2021-12-22 12:09:40,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40" (1/1) ... [2021-12-22 12:09:40,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40" (1/1) ... [2021-12-22 12:09:40,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40" (1/1) ... [2021-12-22 12:09:40,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40" (1/1) ... [2021-12-22 12:09:40,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40" (1/1) ... [2021-12-22 12:09:40,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40" (1/1) ... [2021-12-22 12:09:40,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:09:40,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:09:40,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:09:40,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:09:40,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40" (1/1) ... [2021-12-22 12:09:40,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:09:41,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:09:41,029 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) [2021-12-22 12:09:41,038 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 [2021-12-22 12:09:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:09:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:09:41,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:09:41,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:09:41,133 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:09:41,134 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:09:41,568 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:09:41,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:09:41,581 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 12:09:41,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:09:41 BoogieIcfgContainer [2021-12-22 12:09:41,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:09:41,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:09:41,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:09:41,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:09:41,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:09:40" (1/3) ... [2021-12-22 12:09:41,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba79d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:09:41, skipping insertion in model container [2021-12-22 12:09:41,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:09:40" (2/3) ... [2021-12-22 12:09:41,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba79d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:09:41, skipping insertion in model container [2021-12-22 12:09:41,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:09:41" (3/3) ... [2021-12-22 12:09:41,592 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-22 12:09:41,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:09:41,597 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 12:09:41,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:09:41,654 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 [2021-12-22 12:09:41,654 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 12:09:41,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 105 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 12:09:41,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:41,675 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] [2021-12-22 12:09:41,675 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:41,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1096512752, now seen corresponding path program 1 times [2021-12-22 12:09:41,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:41,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445193581] [2021-12-22 12:09:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:41,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:42,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:42,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445193581] [2021-12-22 12:09:42,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445193581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:42,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:42,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:09:42,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234873761] [2021-12-22 12:09:42,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:42,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:09:42,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:42,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:09:42,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:09:42,068 INFO L87 Difference]: Start difference. First operand has 106 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 105 states have internal predecessors, (180), 0 states have call successors, (0), 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 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:42,384 INFO L93 Difference]: Finished difference Result 422 states and 668 transitions. [2021-12-22 12:09:42,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 12:09:42,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-12-22 12:09:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:42,398 INFO L225 Difference]: With dead ends: 422 [2021-12-22 12:09:42,398 INFO L226 Difference]: Without dead ends: 358 [2021-12-22 12:09:42,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 12:09:42,404 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 596 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 775 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 [2021-12-22 12:09:42,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 775 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:09:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-22 12:09:42,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 156. [2021-12-22 12:09:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 154 states have (on average 1.4415584415584415) internal successors, (222), 155 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 222 transitions. [2021-12-22 12:09:42,461 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 222 transitions. Word has length 47 [2021-12-22 12:09:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:42,461 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 222 transitions. [2021-12-22 12:09:42,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 222 transitions. [2021-12-22 12:09:42,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 12:09:42,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:42,463 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] [2021-12-22 12:09:42,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:09:42,464 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash 191283016, now seen corresponding path program 1 times [2021-12-22 12:09:42,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:42,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061153869] [2021-12-22 12:09:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:42,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:42,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:42,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061153869] [2021-12-22 12:09:42,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061153869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:42,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:42,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:09:42,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603111193] [2021-12-22 12:09:42,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:42,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:09:42,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:42,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:09:42,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:09:42,541 INFO L87 Difference]: Start difference. First operand 156 states and 222 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2021-12-22 12:09:42,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:42,601 INFO L93 Difference]: Finished difference Result 247 states and 359 transitions. [2021-12-22 12:09:42,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:09:42,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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 [2021-12-22 12:09:42,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:42,605 INFO L225 Difference]: With dead ends: 247 [2021-12-22 12:09:42,605 INFO L226 Difference]: Without dead ends: 160 [2021-12-22 12:09:42,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:09:42,611 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 75 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 305 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 [2021-12-22 12:09:42,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 305 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:09:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-22 12:09:42,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-12-22 12:09:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 156 states have (on average 1.4294871794871795) internal successors, (223), 157 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 223 transitions. [2021-12-22 12:09:42,634 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 223 transitions. Word has length 48 [2021-12-22 12:09:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:42,635 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 223 transitions. [2021-12-22 12:09:42,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2021-12-22 12:09:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 223 transitions. [2021-12-22 12:09:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-22 12:09:42,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:42,642 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] [2021-12-22 12:09:42,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:09:42,643 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:42,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1589815569, now seen corresponding path program 1 times [2021-12-22 12:09:42,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:42,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737563458] [2021-12-22 12:09:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:42,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:42,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:42,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737563458] [2021-12-22 12:09:42,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737563458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:42,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:42,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:09:42,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805874308] [2021-12-22 12:09:42,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:42,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:09:42,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:42,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:09:42,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:09:42,765 INFO L87 Difference]: Start difference. First operand 158 states and 223 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2021-12-22 12:09:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:42,880 INFO L93 Difference]: Finished difference Result 478 states and 707 transitions. [2021-12-22 12:09:42,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:09:42,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 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 [2021-12-22 12:09:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:42,883 INFO L225 Difference]: With dead ends: 478 [2021-12-22 12:09:42,883 INFO L226 Difference]: Without dead ends: 394 [2021-12-22 12:09:42,887 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 [2021-12-22 12:09:42,892 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 304 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:09:42,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 542 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:09:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-12-22 12:09:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 251. [2021-12-22 12:09:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 249 states have (on average 1.4698795180722892) internal successors, (366), 250 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 366 transitions. [2021-12-22 12:09:42,925 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 366 transitions. Word has length 49 [2021-12-22 12:09:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:42,925 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 366 transitions. [2021-12-22 12:09:42,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2021-12-22 12:09:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 366 transitions. [2021-12-22 12:09:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-22 12:09:42,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:42,927 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] [2021-12-22 12:09:42,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:09:42,927 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:42,928 INFO L85 PathProgramCache]: Analyzing trace with hash 727047131, now seen corresponding path program 1 times [2021-12-22 12:09:42,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:42,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181453769] [2021-12-22 12:09:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:42,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:43,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:43,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181453769] [2021-12-22 12:09:43,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181453769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:43,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:43,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:09:43,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371570754] [2021-12-22 12:09:43,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:43,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:09:43,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:43,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:09:43,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:09:43,024 INFO L87 Difference]: Start difference. First operand 251 states and 366 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2021-12-22 12:09:43,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:43,138 INFO L93 Difference]: Finished difference Result 566 states and 842 transitions. [2021-12-22 12:09:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:09:43,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 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 [2021-12-22 12:09:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:43,142 INFO L225 Difference]: With dead ends: 566 [2021-12-22 12:09:43,143 INFO L226 Difference]: Without dead ends: 482 [2021-12-22 12:09:43,146 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 [2021-12-22 12:09:43,151 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 358 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 564 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 [2021-12-22 12:09:43,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 564 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:09:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-12-22 12:09:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 382. [2021-12-22 12:09:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 380 states have (on average 1.4894736842105263) internal successors, (566), 381 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 566 transitions. [2021-12-22 12:09:43,196 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 566 transitions. Word has length 49 [2021-12-22 12:09:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:43,197 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 566 transitions. [2021-12-22 12:09:43,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2021-12-22 12:09:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 566 transitions. [2021-12-22 12:09:43,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-22 12:09:43,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:43,202 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] [2021-12-22 12:09:43,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:09:43,207 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:43,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:43,208 INFO L85 PathProgramCache]: Analyzing trace with hash 118541383, now seen corresponding path program 1 times [2021-12-22 12:09:43,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:43,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453606283] [2021-12-22 12:09:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:43,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:43,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:43,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453606283] [2021-12-22 12:09:43,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453606283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:43,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:43,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:09:43,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205051759] [2021-12-22 12:09:43,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:43,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:09:43,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:43,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:09:43,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:09:43,318 INFO L87 Difference]: Start difference. First operand 382 states and 566 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2021-12-22 12:09:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:43,431 INFO L93 Difference]: Finished difference Result 659 states and 985 transitions. [2021-12-22 12:09:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:09:43,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 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 [2021-12-22 12:09:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:43,436 INFO L225 Difference]: With dead ends: 659 [2021-12-22 12:09:43,436 INFO L226 Difference]: Without dead ends: 575 [2021-12-22 12:09:43,438 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 [2021-12-22 12:09:43,438 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 367 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:09:43,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 560 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:09:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-12-22 12:09:43,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 475. [2021-12-22 12:09:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.4989429175475688) internal successors, (709), 474 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 709 transitions. [2021-12-22 12:09:43,477 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 709 transitions. Word has length 49 [2021-12-22 12:09:43,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:43,481 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 709 transitions. [2021-12-22 12:09:43,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2021-12-22 12:09:43,481 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 709 transitions. [2021-12-22 12:09:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 12:09:43,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:43,482 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] [2021-12-22 12:09:43,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:09:43,483 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:43,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:43,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2078764873, now seen corresponding path program 1 times [2021-12-22 12:09:43,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:43,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594185298] [2021-12-22 12:09:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:43,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:43,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:43,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594185298] [2021-12-22 12:09:43,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594185298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:43,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:43,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:09:43,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501678977] [2021-12-22 12:09:43,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:43,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:09:43,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:43,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:09:43,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:09:43,573 INFO L87 Difference]: Start difference. First operand 475 states and 709 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 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) [2021-12-22 12:09:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:43,696 INFO L93 Difference]: Finished difference Result 928 states and 1395 transitions. [2021-12-22 12:09:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:09:43,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 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 [2021-12-22 12:09:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:43,699 INFO L225 Difference]: With dead ends: 928 [2021-12-22 12:09:43,699 INFO L226 Difference]: Without dead ends: 475 [2021-12-22 12:09:43,700 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 [2021-12-22 12:09:43,701 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 380 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:09:43,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 82 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:09:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-22 12:09:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 475. [2021-12-22 12:09:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.477801268498943) internal successors, (699), 474 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:43,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 699 transitions. [2021-12-22 12:09:43,743 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 699 transitions. Word has length 50 [2021-12-22 12:09:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:43,744 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 699 transitions. [2021-12-22 12:09:43,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 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) [2021-12-22 12:09:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 699 transitions. [2021-12-22 12:09:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 12:09:43,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:43,745 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] [2021-12-22 12:09:43,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:09:43,745 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:43,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1832903282, now seen corresponding path program 1 times [2021-12-22 12:09:43,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:43,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972934301] [2021-12-22 12:09:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:43,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:43,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:43,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972934301] [2021-12-22 12:09:43,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972934301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:43,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:43,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:09:43,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675824213] [2021-12-22 12:09:43,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:43,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:09:43,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:09:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:09:43,791 INFO L87 Difference]: Start difference. First operand 475 states and 699 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) [2021-12-22 12:09:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:43,933 INFO L93 Difference]: Finished difference Result 924 states and 1371 transitions. [2021-12-22 12:09:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:09:43,934 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 [2021-12-22 12:09:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:43,937 INFO L225 Difference]: With dead ends: 924 [2021-12-22 12:09:43,937 INFO L226 Difference]: Without dead ends: 475 [2021-12-22 12:09:43,938 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 [2021-12-22 12:09:43,939 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 362 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 90 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 [2021-12-22 12:09:43,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 90 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:09:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-22 12:09:43,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 475. [2021-12-22 12:09:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.4566596194503172) internal successors, (689), 474 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 689 transitions. [2021-12-22 12:09:43,984 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 689 transitions. Word has length 51 [2021-12-22 12:09:43,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:43,985 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 689 transitions. [2021-12-22 12:09:43,985 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) [2021-12-22 12:09:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 689 transitions. [2021-12-22 12:09:43,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 12:09:43,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:43,987 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] [2021-12-22 12:09:43,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 12:09:43,987 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:43,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1624812893, now seen corresponding path program 1 times [2021-12-22 12:09:43,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:43,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895073409] [2021-12-22 12:09:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:43,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:44,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:44,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895073409] [2021-12-22 12:09:44,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895073409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:44,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:44,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:09:44,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658559026] [2021-12-22 12:09:44,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:44,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:09:44,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:44,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:09:44,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:09:44,047 INFO L87 Difference]: Start difference. First operand 475 states and 689 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) [2021-12-22 12:09:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:44,176 INFO L93 Difference]: Finished difference Result 920 states and 1347 transitions. [2021-12-22 12:09:44,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:09:44,177 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 [2021-12-22 12:09:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:44,179 INFO L225 Difference]: With dead ends: 920 [2021-12-22 12:09:44,179 INFO L226 Difference]: Without dead ends: 475 [2021-12-22 12:09:44,180 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 [2021-12-22 12:09:44,181 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 344 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:09:44,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 98 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:09:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-12-22 12:09:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 475. [2021-12-22 12:09:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.4355179704016914) internal successors, (679), 474 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 679 transitions. [2021-12-22 12:09:44,225 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 679 transitions. Word has length 52 [2021-12-22 12:09:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:44,225 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 679 transitions. [2021-12-22 12:09:44,226 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) [2021-12-22 12:09:44,226 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 679 transitions. [2021-12-22 12:09:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 12:09:44,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:44,227 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] [2021-12-22 12:09:44,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 12:09:44,227 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1423750650, now seen corresponding path program 1 times [2021-12-22 12:09:44,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:44,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734424799] [2021-12-22 12:09:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:44,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:44,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:44,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734424799] [2021-12-22 12:09:44,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734424799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:44,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:44,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 12:09:44,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442941820] [2021-12-22 12:09:44,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:44,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 12:09:44,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 12:09:44,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-22 12:09:44,522 INFO L87 Difference]: Start difference. First operand 475 states and 679 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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) [2021-12-22 12:09:45,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:45,130 INFO L93 Difference]: Finished difference Result 1299 states and 1873 transitions. [2021-12-22 12:09:45,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 12:09:45,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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 [2021-12-22 12:09:45,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:45,136 INFO L225 Difference]: With dead ends: 1299 [2021-12-22 12:09:45,136 INFO L226 Difference]: Without dead ends: 901 [2021-12-22 12:09:45,137 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 [2021-12-22 12:09:45,139 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 738 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 12:09:45,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 374 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 12:09:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-12-22 12:09:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 475. [2021-12-22 12:09:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.427061310782241) internal successors, (675), 474 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 675 transitions. [2021-12-22 12:09:45,204 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 675 transitions. Word has length 53 [2021-12-22 12:09:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:45,205 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 675 transitions. [2021-12-22 12:09:45,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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) [2021-12-22 12:09:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 675 transitions. [2021-12-22 12:09:45,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 12:09:45,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:45,206 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] [2021-12-22 12:09:45,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 12:09:45,206 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:45,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:45,207 INFO L85 PathProgramCache]: Analyzing trace with hash 232050318, now seen corresponding path program 1 times [2021-12-22 12:09:45,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:45,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127327285] [2021-12-22 12:09:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:45,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:45,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:45,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127327285] [2021-12-22 12:09:45,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127327285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:45,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:45,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 12:09:45,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197123911] [2021-12-22 12:09:45,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:45,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 12:09:45,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:45,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 12:09:45,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 12:09:45,358 INFO L87 Difference]: Start difference. First operand 475 states and 675 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 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) [2021-12-22 12:09:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:45,811 INFO L93 Difference]: Finished difference Result 1286 states and 1857 transitions. [2021-12-22 12:09:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:09:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 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 [2021-12-22 12:09:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:45,816 INFO L225 Difference]: With dead ends: 1286 [2021-12-22 12:09:45,816 INFO L226 Difference]: Without dead ends: 873 [2021-12-22 12:09:45,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-22 12:09:45,817 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 732 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:09:45,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 297 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:09:45,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-12-22 12:09:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 475. [2021-12-22 12:09:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.4249471458773784) internal successors, (674), 474 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 674 transitions. [2021-12-22 12:09:45,892 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 674 transitions. Word has length 53 [2021-12-22 12:09:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:45,893 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 674 transitions. [2021-12-22 12:09:45,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 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) [2021-12-22 12:09:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 674 transitions. [2021-12-22 12:09:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 12:09:45,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:45,894 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] [2021-12-22 12:09:45,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 12:09:45,894 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:45,895 INFO L85 PathProgramCache]: Analyzing trace with hash 563944451, now seen corresponding path program 1 times [2021-12-22 12:09:45,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:45,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433253757] [2021-12-22 12:09:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:45,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:46,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:46,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433253757] [2021-12-22 12:09:46,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433253757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:46,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:46,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 12:09:46,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100371766] [2021-12-22 12:09:46,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:46,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 12:09:46,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:46,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 12:09:46,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-22 12:09:46,149 INFO L87 Difference]: Start difference. First operand 475 states and 674 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-12-22 12:09:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:47,226 INFO L93 Difference]: Finished difference Result 1620 states and 2320 transitions. [2021-12-22 12:09:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 12:09:47,227 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 [2021-12-22 12:09:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:47,231 INFO L225 Difference]: With dead ends: 1620 [2021-12-22 12:09:47,232 INFO L226 Difference]: Without dead ends: 1212 [2021-12-22 12:09:47,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-12-22 12:09:47,233 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 654 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 12:09:47,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 623 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 12:09:47,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-12-22 12:09:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 475. [2021-12-22 12:09:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.4207188160676534) internal successors, (672), 474 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 672 transitions. [2021-12-22 12:09:47,320 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 672 transitions. Word has length 54 [2021-12-22 12:09:47,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:47,321 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 672 transitions. [2021-12-22 12:09:47,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-12-22 12:09:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 672 transitions. [2021-12-22 12:09:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 12:09:47,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:47,322 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] [2021-12-22 12:09:47,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 12:09:47,322 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:47,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:47,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1521991144, now seen corresponding path program 1 times [2021-12-22 12:09:47,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:47,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097239648] [2021-12-22 12:09:47,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:47,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:47,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:47,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097239648] [2021-12-22 12:09:47,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097239648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:47,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:47,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-22 12:09:47,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978949831] [2021-12-22 12:09:47,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:47,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 12:09:47,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:47,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 12:09:47,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-12-22 12:09:47,808 INFO L87 Difference]: Start difference. First operand 475 states and 672 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) [2021-12-22 12:09:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:50,164 INFO L93 Difference]: Finished difference Result 2595 states and 3768 transitions. [2021-12-22 12:09:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-22 12:09:50,165 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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 [2021-12-22 12:09:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:50,174 INFO L225 Difference]: With dead ends: 2595 [2021-12-22 12:09:50,174 INFO L226 Difference]: Without dead ends: 2414 [2021-12-22 12:09:50,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=328, Invalid=1478, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 12:09:50,177 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 1023 mSDsluCounter, 3330 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:09:50,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 3608 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1881 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 12:09:50,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-12-22 12:09:50,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 485. [2021-12-22 12:09:50,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 483 states have (on average 1.4161490683229814) internal successors, (684), 484 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 684 transitions. [2021-12-22 12:09:50,310 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 684 transitions. Word has length 55 [2021-12-22 12:09:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:50,311 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 684 transitions. [2021-12-22 12:09:50,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) [2021-12-22 12:09:50,311 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 684 transitions. [2021-12-22 12:09:50,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 12:09:50,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:50,312 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] [2021-12-22 12:09:50,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 12:09:50,312 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:50,313 INFO L85 PathProgramCache]: Analyzing trace with hash 822613335, now seen corresponding path program 1 times [2021-12-22 12:09:50,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:50,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700956162] [2021-12-22 12:09:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:50,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:50,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:50,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700956162] [2021-12-22 12:09:50,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700956162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:50,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:50,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-22 12:09:50,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676102954] [2021-12-22 12:09:50,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:50,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 12:09:50,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 12:09:50,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-12-22 12:09:50,867 INFO L87 Difference]: Start difference. First operand 485 states and 684 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) [2021-12-22 12:09:53,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:53,344 INFO L93 Difference]: Finished difference Result 3168 states and 4615 transitions. [2021-12-22 12:09:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 12:09:53,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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 [2021-12-22 12:09:53,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:53,353 INFO L225 Difference]: With dead ends: 3168 [2021-12-22 12:09:53,354 INFO L226 Difference]: Without dead ends: 2993 [2021-12-22 12:09:53,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=1416, Unknown=0, NotChecked=0, Total=1722 [2021-12-22 12:09:53,355 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 1657 mSDsluCounter, 3773 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1657 SdHoareTripleChecker+Valid, 4107 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:09:53,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1657 Valid, 4107 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 12:09:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-12-22 12:09:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 490. [2021-12-22 12:09:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 488 states have (on average 1.4139344262295082) internal successors, (690), 489 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:53,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 690 transitions. [2021-12-22 12:09:53,494 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 690 transitions. Word has length 55 [2021-12-22 12:09:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:53,494 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 690 transitions. [2021-12-22 12:09:53,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) [2021-12-22 12:09:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 690 transitions. [2021-12-22 12:09:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 12:09:53,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:53,495 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] [2021-12-22 12:09:53,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 12:09:53,496 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1171871732, now seen corresponding path program 1 times [2021-12-22 12:09:53,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:53,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550400214] [2021-12-22 12:09:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:53,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:53,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:53,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550400214] [2021-12-22 12:09:53,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550400214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:53,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:53,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 12:09:53,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751246881] [2021-12-22 12:09:53,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:53,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 12:09:53,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 12:09:53,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-22 12:09:53,851 INFO L87 Difference]: Start difference. First operand 490 states and 690 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2021-12-22 12:09:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:55,289 INFO L93 Difference]: Finished difference Result 1841 states and 2668 transitions. [2021-12-22 12:09:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 12:09:55,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 [2021-12-22 12:09:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:55,295 INFO L225 Difference]: With dead ends: 1841 [2021-12-22 12:09:55,296 INFO L226 Difference]: Without dead ends: 1645 [2021-12-22 12:09:55,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-22 12:09:55,297 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 920 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 12:09:55,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 1555 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 12:09:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-12-22 12:09:55,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 468. [2021-12-22 12:09:55,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 466 states have (on average 1.4163090128755365) internal successors, (660), 467 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:55,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 660 transitions. [2021-12-22 12:09:55,453 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 660 transitions. Word has length 55 [2021-12-22 12:09:55,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:55,453 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 660 transitions. [2021-12-22 12:09:55,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2021-12-22 12:09:55,454 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 660 transitions. [2021-12-22 12:09:55,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 12:09:55,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:55,454 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] [2021-12-22 12:09:55,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 12:09:55,455 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:55,455 INFO L85 PathProgramCache]: Analyzing trace with hash 380290649, now seen corresponding path program 1 times [2021-12-22 12:09:55,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:55,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505672420] [2021-12-22 12:09:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:55,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:55,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:55,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505672420] [2021-12-22 12:09:55,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505672420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:55,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:55,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 12:09:55,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146123172] [2021-12-22 12:09:55,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:55,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 12:09:55,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:55,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 12:09:55,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-22 12:09:55,768 INFO L87 Difference]: Start difference. First operand 468 states and 660 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 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) [2021-12-22 12:09:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:09:57,672 INFO L93 Difference]: Finished difference Result 2525 states and 3693 transitions. [2021-12-22 12:09:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 12:09:57,673 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 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 [2021-12-22 12:09:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:09:57,680 INFO L225 Difference]: With dead ends: 2525 [2021-12-22 12:09:57,680 INFO L226 Difference]: Without dead ends: 2334 [2021-12-22 12:09:57,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2021-12-22 12:09:57,682 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 967 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 12:09:57,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 1117 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 12:09:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-12-22 12:09:57,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 446. [2021-12-22 12:09:57,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 444 states have (on average 1.4211711711711712) internal successors, (631), 445 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:09:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 631 transitions. [2021-12-22 12:09:57,922 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 631 transitions. Word has length 55 [2021-12-22 12:09:57,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:09:57,923 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 631 transitions. [2021-12-22 12:09:57,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 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) [2021-12-22 12:09:57,923 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 631 transitions. [2021-12-22 12:09:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 12:09:57,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:09:57,924 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] [2021-12-22 12:09:57,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 12:09:57,924 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:09:57,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:09:57,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1258334466, now seen corresponding path program 1 times [2021-12-22 12:09:57,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:09:57,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712529895] [2021-12-22 12:09:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:09:57,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:09:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:09:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:09:58,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:09:58,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712529895] [2021-12-22 12:09:58,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712529895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:09:58,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:09:58,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-22 12:09:58,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835401352] [2021-12-22 12:09:58,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:09:58,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 12:09:58,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:09:58,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 12:09:58,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-12-22 12:09:58,767 INFO L87 Difference]: Start difference. First operand 446 states and 631 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 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) [2021-12-22 12:10:03,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:10:03,475 INFO L93 Difference]: Finished difference Result 3721 states and 5464 transitions. [2021-12-22 12:10:03,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-22 12:10:03,476 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 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 [2021-12-22 12:10:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:10:03,487 INFO L225 Difference]: With dead ends: 3721 [2021-12-22 12:10:03,487 INFO L226 Difference]: Without dead ends: 3546 [2021-12-22 12:10:03,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2021-12-22 12:10:03,489 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 1493 mSDsluCounter, 4831 mSDsCounter, 0 mSdLazyCounter, 2648 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 5196 SdHoareTripleChecker+Invalid, 2697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 12:10:03,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 5196 Invalid, 2697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2648 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 12:10:03,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-12-22 12:10:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 447. [2021-12-22 12:10:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 445 states have (on average 1.4202247191011237) internal successors, (632), 446 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 632 transitions. [2021-12-22 12:10:03,722 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 632 transitions. Word has length 56 [2021-12-22 12:10:03,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:10:03,722 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 632 transitions. [2021-12-22 12:10:03,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 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) [2021-12-22 12:10:03,723 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 632 transitions. [2021-12-22 12:10:03,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 12:10:03,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:10:03,724 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] [2021-12-22 12:10:03,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 12:10:03,724 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:10:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:10:03,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1179705887, now seen corresponding path program 1 times [2021-12-22 12:10:03,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:10:03,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712236889] [2021-12-22 12:10:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:10:03,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:10:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:10:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:10:04,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:10:04,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712236889] [2021-12-22 12:10:04,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712236889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:10:04,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:10:04,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 12:10:04,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580307439] [2021-12-22 12:10:04,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:10:04,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 12:10:04,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:10:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 12:10:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-22 12:10:04,131 INFO L87 Difference]: Start difference. First operand 447 states and 632 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 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) [2021-12-22 12:10:06,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:10:06,000 INFO L93 Difference]: Finished difference Result 1991 states and 2907 transitions. [2021-12-22 12:10:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 12:10:06,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 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 [2021-12-22 12:10:06,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:10:06,005 INFO L225 Difference]: With dead ends: 1991 [2021-12-22 12:10:06,005 INFO L226 Difference]: Without dead ends: 1816 [2021-12-22 12:10:06,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-12-22 12:10:06,007 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 1147 mSDsluCounter, 1658 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 12:10:06,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1147 Valid, 1880 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 12:10:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-12-22 12:10:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 447. [2021-12-22 12:10:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 445 states have (on average 1.4202247191011237) internal successors, (632), 446 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 632 transitions. [2021-12-22 12:10:06,205 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 632 transitions. Word has length 56 [2021-12-22 12:10:06,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:10:06,205 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 632 transitions. [2021-12-22 12:10:06,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 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) [2021-12-22 12:10:06,206 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 632 transitions. [2021-12-22 12:10:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 12:10:06,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:10:06,206 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] [2021-12-22 12:10:06,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 12:10:06,207 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:10:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:10:06,207 INFO L85 PathProgramCache]: Analyzing trace with hash -684019272, now seen corresponding path program 1 times [2021-12-22 12:10:06,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:10:06,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977544190] [2021-12-22 12:10:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:10:06,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:10:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:10:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:10:06,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:10:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977544190] [2021-12-22 12:10:06,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977544190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:10:06,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:10:06,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-22 12:10:06,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696249765] [2021-12-22 12:10:06,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:10:06,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 12:10:06,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:10:06,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 12:10:06,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-12-22 12:10:06,634 INFO L87 Difference]: Start difference. First operand 447 states and 632 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2021-12-22 12:10:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:10:10,632 INFO L93 Difference]: Finished difference Result 3615 states and 5314 transitions. [2021-12-22 12:10:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-22 12:10:10,632 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 [2021-12-22 12:10:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:10:10,642 INFO L225 Difference]: With dead ends: 3615 [2021-12-22 12:10:10,642 INFO L226 Difference]: Without dead ends: 3440 [2021-12-22 12:10:10,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-12-22 12:10:10,645 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 1073 mSDsluCounter, 3765 mSDsCounter, 0 mSdLazyCounter, 2064 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 4080 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:10:10,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 4080 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2064 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 12:10:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-12-22 12:10:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 428. [2021-12-22 12:10:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.4285714285714286) internal successors, (610), 427 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 610 transitions. [2021-12-22 12:10:10,874 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 610 transitions. Word has length 57 [2021-12-22 12:10:10,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:10:10,874 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 610 transitions. [2021-12-22 12:10:10,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2021-12-22 12:10:10,874 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 610 transitions. [2021-12-22 12:10:10,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-22 12:10:10,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:10:10,875 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] [2021-12-22 12:10:10,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 12:10:10,876 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:10:10,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:10:10,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1531780676, now seen corresponding path program 1 times [2021-12-22 12:10:10,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:10:10,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701791817] [2021-12-22 12:10:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:10:10,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:10:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:10:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:10:10,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:10:10,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701791817] [2021-12-22 12:10:10,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701791817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:10:10,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:10:10,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:10:10,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955783197] [2021-12-22 12:10:10,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:10:10,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:10:10,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:10:10,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:10:10,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:10:10,914 INFO L87 Difference]: Start difference. First operand 428 states and 610 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:10:11,461 INFO L93 Difference]: Finished difference Result 1112 states and 1613 transitions. [2021-12-22 12:10:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:10:11,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-12-22 12:10:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:10:11,477 INFO L225 Difference]: With dead ends: 1112 [2021-12-22 12:10:11,478 INFO L226 Difference]: Without dead ends: 741 [2021-12-22 12:10:11,479 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 [2021-12-22 12:10:11,479 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 70 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:10:11,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 189 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:10:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-12-22 12:10:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 730. [2021-12-22 12:10:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 1.412894375857339) internal successors, (1030), 729 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1030 transitions. [2021-12-22 12:10:11,933 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1030 transitions. Word has length 75 [2021-12-22 12:10:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:10:11,933 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1030 transitions. [2021-12-22 12:10:11,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1030 transitions. [2021-12-22 12:10:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-22 12:10:11,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:10:11,934 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] [2021-12-22 12:10:11,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 12:10:11,935 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:10:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:10:11,935 INFO L85 PathProgramCache]: Analyzing trace with hash 241252331, now seen corresponding path program 1 times [2021-12-22 12:10:11,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:10:11,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249296688] [2021-12-22 12:10:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:10:11,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:10:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:10:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:10:11,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:10:11,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249296688] [2021-12-22 12:10:11,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249296688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:10:11,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:10:11,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:10:11,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437531060] [2021-12-22 12:10:11,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:10:11,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:10:11,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:10:11,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:10:11,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:10:11,983 INFO L87 Difference]: Start difference. First operand 730 states and 1030 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:10:12,912 INFO L93 Difference]: Finished difference Result 2004 states and 2844 transitions. [2021-12-22 12:10:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:10:12,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-22 12:10:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:10:12,918 INFO L225 Difference]: With dead ends: 2004 [2021-12-22 12:10:12,918 INFO L226 Difference]: Without dead ends: 1331 [2021-12-22 12:10:12,919 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 [2021-12-22 12:10:12,920 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 51 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 257 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 [2021-12-22 12:10:12,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 257 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:10:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-12-22 12:10:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1257. [2021-12-22 12:10:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 1.4052547770700636) internal successors, (1765), 1256 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 1765 transitions. [2021-12-22 12:10:13,664 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 1765 transitions. Word has length 76 [2021-12-22 12:10:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:10:13,665 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 1765 transitions. [2021-12-22 12:10:13,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 1765 transitions. [2021-12-22 12:10:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 12:10:13,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:10:13,666 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] [2021-12-22 12:10:13,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 12:10:13,666 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:10:13,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:10:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1306565925, now seen corresponding path program 1 times [2021-12-22 12:10:13,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:10:13,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351083299] [2021-12-22 12:10:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:10:13,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:10:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:10:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:10:13,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:10:13,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351083299] [2021-12-22 12:10:13,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351083299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:10:13,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:10:13,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:10:13,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630039385] [2021-12-22 12:10:13,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:10:13,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:10:13,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:10:13,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:10:13,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:10:13,711 INFO L87 Difference]: Start difference. First operand 1257 states and 1765 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) [2021-12-22 12:10:15,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:10:15,160 INFO L93 Difference]: Finished difference Result 3513 states and 4923 transitions. [2021-12-22 12:10:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:10:15,160 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 [2021-12-22 12:10:15,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:10:15,164 INFO L225 Difference]: With dead ends: 3513 [2021-12-22 12:10:15,164 INFO L226 Difference]: Without dead ends: 2313 [2021-12-22 12:10:15,166 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 [2021-12-22 12:10:15,166 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 44 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 255 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 [2021-12-22 12:10:15,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 255 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:10:15,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-12-22 12:10:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2167. [2021-12-22 12:10:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 1.3855032317636196) internal successors, (3001), 2166 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:16,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 3001 transitions. [2021-12-22 12:10:16,464 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 3001 transitions. Word has length 77 [2021-12-22 12:10:16,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:10:16,464 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 3001 transitions. [2021-12-22 12:10:16,465 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) [2021-12-22 12:10:16,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 3001 transitions. [2021-12-22 12:10:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-22 12:10:16,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:10:16,465 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] [2021-12-22 12:10:16,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 12:10:16,465 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:10:16,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:10:16,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1695604898, now seen corresponding path program 1 times [2021-12-22 12:10:16,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:10:16,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238589331] [2021-12-22 12:10:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:10:16,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:10:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:10:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:10:16,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:10:16,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238589331] [2021-12-22 12:10:16,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238589331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:10:16,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:10:16,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:10:16,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015666658] [2021-12-22 12:10:16,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:10:16,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:10:16,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:10:16,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:10:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:10:16,542 INFO L87 Difference]: Start difference. First operand 2167 states and 3001 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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) [2021-12-22 12:10:18,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:10:18,998 INFO L93 Difference]: Finished difference Result 3858 states and 5300 transitions. [2021-12-22 12:10:18,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 12:10:18,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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 [2021-12-22 12:10:18,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:10:19,005 INFO L225 Difference]: With dead ends: 3858 [2021-12-22 12:10:19,005 INFO L226 Difference]: Without dead ends: 3856 [2021-12-22 12:10:19,005 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 [2021-12-22 12:10:19,006 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 197 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:10:19,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 655 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:10:19,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3856 states. [2021-12-22 12:10:20,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3856 to 2263. [2021-12-22 12:10:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 1.3603006189213085) internal successors, (3077), 2262 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 3077 transitions. [2021-12-22 12:10:20,408 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 3077 transitions. Word has length 78 [2021-12-22 12:10:20,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:10:20,408 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 3077 transitions. [2021-12-22 12:10:20,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 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) [2021-12-22 12:10:20,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 3077 transitions. [2021-12-22 12:10:20,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 12:10:20,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:10:20,409 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] [2021-12-22 12:10:20,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 12:10:20,410 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:10:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:10:20,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1415916470, now seen corresponding path program 1 times [2021-12-22 12:10:20,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:10:20,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281026629] [2021-12-22 12:10:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:10:20,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:10:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:10:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:10:20,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:10:20,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281026629] [2021-12-22 12:10:20,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281026629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:10:20,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:10:20,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:10:20,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243904247] [2021-12-22 12:10:20,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:10:20,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:10:20,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:10:20,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:10:20,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:10:20,450 INFO L87 Difference]: Start difference. First operand 2263 states and 3077 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) [2021-12-22 12:10:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:10:22,740 INFO L93 Difference]: Finished difference Result 5883 states and 7991 transitions. [2021-12-22 12:10:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:10:22,740 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 [2021-12-22 12:10:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:10:22,746 INFO L225 Difference]: With dead ends: 5883 [2021-12-22 12:10:22,746 INFO L226 Difference]: Without dead ends: 3677 [2021-12-22 12:10:22,750 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 [2021-12-22 12:10:22,751 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 55 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 261 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 [2021-12-22 12:10:22,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 261 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:10:22,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2021-12-22 12:10:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 3387. [2021-12-22 12:10:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.3411104548139396) internal successors, (4541), 3386 states have internal predecessors, (4541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 4541 transitions. [2021-12-22 12:10:24,862 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 4541 transitions. Word has length 79 [2021-12-22 12:10:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:10:24,863 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 4541 transitions. [2021-12-22 12:10:24,863 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) [2021-12-22 12:10:24,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 4541 transitions. [2021-12-22 12:10:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-22 12:10:24,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:10:24,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:10:24,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 12:10:24,865 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:10:24,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:10:24,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1940322908, now seen corresponding path program 1 times [2021-12-22 12:10:24,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:10:24,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033604375] [2021-12-22 12:10:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:10:24,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:10:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:10:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:10:24,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:10:24,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033604375] [2021-12-22 12:10:24,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033604375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:10:24,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:10:24,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:10:24,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546923410] [2021-12-22 12:10:24,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:10:24,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:10:24,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:10:24,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:10:24,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:10:24,910 INFO L87 Difference]: Start difference. First operand 3387 states and 4541 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:10:27,039 INFO L93 Difference]: Finished difference Result 6719 states and 9023 transitions. [2021-12-22 12:10:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:10:27,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-12-22 12:10:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:10:27,047 INFO L225 Difference]: With dead ends: 6719 [2021-12-22 12:10:27,047 INFO L226 Difference]: Without dead ends: 3389 [2021-12-22 12:10:27,052 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 [2021-12-22 12:10:27,053 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 57 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:10:27,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 233 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:10:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3389 states. [2021-12-22 12:10:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3389 to 3387. [2021-12-22 12:10:29,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.3198464264619019) internal successors, (4469), 3386 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 4469 transitions. [2021-12-22 12:10:29,060 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 4469 transitions. Word has length 100 [2021-12-22 12:10:29,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:10:29,061 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 4469 transitions. [2021-12-22 12:10:29,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:10:29,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 4469 transitions. [2021-12-22 12:10:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-22 12:10:29,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:10:29,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:10:29,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 12:10:29,062 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:10:29,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:10:29,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1124551470, now seen corresponding path program 1 times [2021-12-22 12:10:29,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:10:29,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554694197] [2021-12-22 12:10:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:10:29,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:10:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:10:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:10:29,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:10:29,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554694197] [2021-12-22 12:10:29,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554694197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:10:29,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785991010] [2021-12-22 12:10:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:10:29,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:10:29,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:10:29,251 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) [2021-12-22 12:10:29,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 12:10:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:10:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 12:10:29,404 INFO L286 TraceCheckSpWp]: Computing forward predicates...