./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label06.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 1b5bedda6fafe9d5e27c46cd442327641e760ea4d9632bf3cdc5cb7e6cff3dd5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:22:07,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:22:07,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:22:07,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:22:07,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:22:07,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:22:07,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:22:07,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:22:07,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:22:07,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:22:07,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:22:07,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:22:07,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:22:07,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:22:07,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:22:07,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:22:07,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:22:07,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:22:07,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:22:07,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:22:07,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:22:07,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:22:07,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:22:07,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:22:07,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:22:07,599 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:22:07,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:22:07,600 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:22:07,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:22:07,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:22:07,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:22:07,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:22:07,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:22:07,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:22:07,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:22:07,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:22:07,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:22:07,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:22:07,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:22:07,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:22:07,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:22:07,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:22:07,637 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:22:07,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:22:07,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:22:07,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:22:07,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:22:07,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:22:07,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:22:07,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:22:07,641 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:22:07,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:22:07,642 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:22:07,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:22:07,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:22:07,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:22:07,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:22:07,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:22:07,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:22:07,643 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:22:07,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:22:07,643 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:22:07,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:22:07,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:22:07,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:22:07,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:22:07,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:22:07,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:22:07,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:22:07,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:22:07,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:22:07,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:22:07,644 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:22:07,645 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:22:07,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:22:07,645 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b5bedda6fafe9d5e27c46cd442327641e760ea4d9632bf3cdc5cb7e6cff3dd5 [2021-12-28 02:22:07,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:22:07,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:22:07,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:22:07,946 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:22:07,948 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:22:07,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label06.c [2021-12-28 02:22:07,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19899a7b6/3890b527f04c4aa7bb8ab202cf0bd1ec/FLAG0c25154e5 [2021-12-28 02:22:08,660 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:22:08,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label06.c [2021-12-28 02:22:08,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19899a7b6/3890b527f04c4aa7bb8ab202cf0bd1ec/FLAG0c25154e5 [2021-12-28 02:22:09,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19899a7b6/3890b527f04c4aa7bb8ab202cf0bd1ec [2021-12-28 02:22:09,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:22:09,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:22:09,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:22:09,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:22:09,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:22:09,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:22:09" (1/1) ... [2021-12-28 02:22:09,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50dde555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:09, skipping insertion in model container [2021-12-28 02:22:09,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:22:09" (1/1) ... [2021-12-28 02:22:09,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:22:09,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:22:09,377 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label06.c[15482,15495] [2021-12-28 02:22:09,397 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label06.c[18299,18312] [2021-12-28 02:22:09,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:22:09,910 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:22:09,952 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label06.c[15482,15495] [2021-12-28 02:22:09,960 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label06.c[18299,18312] [2021-12-28 02:22:10,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:22:10,323 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:22:10,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:10 WrapperNode [2021-12-28 02:22:10,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:22:10,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:22:10,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:22:10,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:22:10,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:10" (1/1) ... [2021-12-28 02:22:10,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:10" (1/1) ... [2021-12-28 02:22:10,840 INFO L137 Inliner]: procedures = 37, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5149 [2021-12-28 02:22:10,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:22:10,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:22:10,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:22:10,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:22:10,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:10" (1/1) ... [2021-12-28 02:22:10,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:10" (1/1) ... [2021-12-28 02:22:10,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:10" (1/1) ... [2021-12-28 02:22:10,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:10" (1/1) ... [2021-12-28 02:22:11,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:10" (1/1) ... [2021-12-28 02:22:11,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:10" (1/1) ... [2021-12-28 02:22:11,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:10" (1/1) ... [2021-12-28 02:22:11,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:22:11,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:22:11,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:22:11,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:22:11,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:10" (1/1) ... [2021-12-28 02:22:11,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:22:11,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:22:11,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 02:22:11,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 02:22:11,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:22:11,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:22:11,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:22:11,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:22:11,662 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:22:11,676 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:22:14,915 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:22:14,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:22:14,927 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 02:22:14,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:22:14 BoogieIcfgContainer [2021-12-28 02:22:14,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:22:14,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:22:14,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:22:14,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:22:14,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:22:09" (1/3) ... [2021-12-28 02:22:14,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5265bc86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:22:14, skipping insertion in model container [2021-12-28 02:22:14,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:22:10" (2/3) ... [2021-12-28 02:22:14,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5265bc86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:22:14, skipping insertion in model container [2021-12-28 02:22:14,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:22:14" (3/3) ... [2021-12-28 02:22:14,936 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label06.c [2021-12-28 02:22:14,939 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:22:14,939 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:22:14,975 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:22:14,981 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 02:22:14,981 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:22:15,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-28 02:22:15,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:15,027 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] [2021-12-28 02:22:15,028 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:15,037 INFO L85 PathProgramCache]: Analyzing trace with hash -407855243, now seen corresponding path program 1 times [2021-12-28 02:22:15,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:15,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468510413] [2021-12-28 02:22:15,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:15,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:15,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:15,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468510413] [2021-12-28 02:22:15,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468510413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:15,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:15,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 02:22:15,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055076244] [2021-12-28 02:22:15,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:15,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:22:15,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:15,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:22:15,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:15,309 INFO L87 Difference]: Start difference. First operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:18,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:18,139 INFO L93 Difference]: Finished difference Result 2561 states and 4920 transitions. [2021-12-28 02:22:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:22:18,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-28 02:22:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:18,162 INFO L225 Difference]: With dead ends: 2561 [2021-12-28 02:22:18,163 INFO L226 Difference]: Without dead ends: 1611 [2021-12-28 02:22:18,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:18,172 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 1058 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:18,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 342 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-28 02:22:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-12-28 02:22:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2021-12-28 02:22:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1609 states have (on average 1.839030453697949) internal successors, (2959), 1610 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2959 transitions. [2021-12-28 02:22:18,252 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2959 transitions. Word has length 24 [2021-12-28 02:22:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:18,252 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 2959 transitions. [2021-12-28 02:22:18,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2959 transitions. [2021-12-28 02:22:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-28 02:22:18,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:18,254 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] [2021-12-28 02:22:18,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:22:18,255 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:18,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2021-12-28 02:22:18,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:18,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135795764] [2021-12-28 02:22:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:18,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:18,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:18,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135795764] [2021-12-28 02:22:18,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135795764] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:18,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:18,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:22:18,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724022136] [2021-12-28 02:22:18,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:18,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:22:18,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:18,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:22:18,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:22:18,316 INFO L87 Difference]: Start difference. First operand 1611 states and 2959 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:18,385 INFO L93 Difference]: Finished difference Result 1675 states and 3058 transitions. [2021-12-28 02:22:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:22:18,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-28 02:22:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:18,392 INFO L225 Difference]: With dead ends: 1675 [2021-12-28 02:22:18,392 INFO L226 Difference]: Without dead ends: 1611 [2021-12-28 02:22:18,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:22:18,394 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 3 mSDsluCounter, 4811 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6429 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:18,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6429 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:22:18,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-12-28 02:22:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2021-12-28 02:22:18,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1609 states have (on average 1.8141702921068987) internal successors, (2919), 1610 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2919 transitions. [2021-12-28 02:22:18,438 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2919 transitions. Word has length 38 [2021-12-28 02:22:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:18,438 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 2919 transitions. [2021-12-28 02:22:18,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2919 transitions. [2021-12-28 02:22:18,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 02:22:18,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:18,441 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] [2021-12-28 02:22:18,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:22:18,441 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:18,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:18,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2021-12-28 02:22:18,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:18,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754547772] [2021-12-28 02:22:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:18,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:18,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:18,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754547772] [2021-12-28 02:22:18,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754547772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:18,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:18,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:22:18,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900414368] [2021-12-28 02:22:18,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:18,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:22:18,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:18,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:22:18,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:18,558 INFO L87 Difference]: Start difference. First operand 1611 states and 2919 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) [2021-12-28 02:22:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:18,585 INFO L93 Difference]: Finished difference Result 1725 states and 3099 transitions. [2021-12-28 02:22:18,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:22:18,585 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 [2021-12-28 02:22:18,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:18,590 INFO L225 Difference]: With dead ends: 1725 [2021-12-28 02:22:18,590 INFO L226 Difference]: Without dead ends: 1665 [2021-12-28 02:22:18,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:18,592 INFO L933 BasicCegarLoop]: 1661 mSDtfsCounter, 1524 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:18,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 1754 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:22:18,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-12-28 02:22:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2021-12-28 02:22:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1661 states have (on average 1.8073449729078868) internal successors, (3002), 1662 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 3002 transitions. [2021-12-28 02:22:18,619 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 3002 transitions. Word has length 77 [2021-12-28 02:22:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:18,619 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 3002 transitions. [2021-12-28 02:22:18,620 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) [2021-12-28 02:22:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 3002 transitions. [2021-12-28 02:22:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 02:22:18,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:18,621 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] [2021-12-28 02:22:18,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:22:18,622 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2021-12-28 02:22:18,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:18,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40642593] [2021-12-28 02:22:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:18,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:18,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:18,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40642593] [2021-12-28 02:22:18,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40642593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:18,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:18,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:22:18,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402608494] [2021-12-28 02:22:18,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:18,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:22:18,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:18,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:22:18,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:18,693 INFO L87 Difference]: Start difference. First operand 1663 states and 3002 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) [2021-12-28 02:22:18,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:18,722 INFO L93 Difference]: Finished difference Result 1875 states and 3338 transitions. [2021-12-28 02:22:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:22:18,723 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 [2021-12-28 02:22:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:18,730 INFO L225 Difference]: With dead ends: 1875 [2021-12-28 02:22:18,730 INFO L226 Difference]: Without dead ends: 1763 [2021-12-28 02:22:18,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:18,737 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1504 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:18,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1504 Valid, 1717 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:22:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-12-28 02:22:18,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2021-12-28 02:22:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1759 states have (on average 1.794769755542922) internal successors, (3157), 1760 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:18,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 3157 transitions. [2021-12-28 02:22:18,770 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 3157 transitions. Word has length 77 [2021-12-28 02:22:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:18,770 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 3157 transitions. [2021-12-28 02:22:18,770 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) [2021-12-28 02:22:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 3157 transitions. [2021-12-28 02:22:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 02:22:18,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:18,772 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] [2021-12-28 02:22:18,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:22:18,772 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2021-12-28 02:22:18,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:18,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378951032] [2021-12-28 02:22:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:18,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:18,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:18,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378951032] [2021-12-28 02:22:18,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378951032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:18,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:18,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:22:18,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827353515] [2021-12-28 02:22:18,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:18,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:22:18,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:18,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:22:18,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:22:18,855 INFO L87 Difference]: Start difference. First operand 1761 states and 3157 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:19,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:19,210 INFO L93 Difference]: Finished difference Result 4281 states and 7153 transitions. [2021-12-28 02:22:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 02:22:19,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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 [2021-12-28 02:22:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:19,234 INFO L225 Difference]: With dead ends: 4281 [2021-12-28 02:22:19,234 INFO L226 Difference]: Without dead ends: 4071 [2021-12-28 02:22:19,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:22:19,237 INFO L933 BasicCegarLoop]: 1574 mSDtfsCounter, 10491 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10491 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:19,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10491 Valid, 2765 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:22:19,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-12-28 02:22:19,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 1969. [2021-12-28 02:22:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1967 states have (on average 1.769700050838841) internal successors, (3481), 1968 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3481 transitions. [2021-12-28 02:22:19,324 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3481 transitions. Word has length 77 [2021-12-28 02:22:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:19,325 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 3481 transitions. [2021-12-28 02:22:19,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:19,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3481 transitions. [2021-12-28 02:22:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-28 02:22:19,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:19,328 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] [2021-12-28 02:22:19,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:22:19,329 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:19,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:19,330 INFO L85 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2021-12-28 02:22:19,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:19,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394644580] [2021-12-28 02:22:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:19,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:19,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:19,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394644580] [2021-12-28 02:22:19,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394644580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:19,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:19,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:22:19,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902288718] [2021-12-28 02:22:19,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:19,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:22:19,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:19,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:22:19,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:19,394 INFO L87 Difference]: Start difference. First operand 1969 states and 3481 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) [2021-12-28 02:22:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:19,461 INFO L93 Difference]: Finished difference Result 2589 states and 4453 transitions. [2021-12-28 02:22:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:22:19,462 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 [2021-12-28 02:22:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:19,471 INFO L225 Difference]: With dead ends: 2589 [2021-12-28 02:22:19,472 INFO L226 Difference]: Without dead ends: 2171 [2021-12-28 02:22:19,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:19,474 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 1496 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 1675 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 [2021-12-28 02:22:19,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 1675 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:22:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-12-28 02:22:19,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2021-12-28 02:22:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2167 states have (on average 1.7485002307337332) internal successors, (3789), 2168 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3789 transitions. [2021-12-28 02:22:19,549 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3789 transitions. Word has length 79 [2021-12-28 02:22:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:19,550 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3789 transitions. [2021-12-28 02:22:19,550 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) [2021-12-28 02:22:19,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3789 transitions. [2021-12-28 02:22:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-28 02:22:19,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:19,552 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] [2021-12-28 02:22:19,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:22:19,552 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:19,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:19,553 INFO L85 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2021-12-28 02:22:19,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:19,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105003264] [2021-12-28 02:22:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:19,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:19,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105003264] [2021-12-28 02:22:19,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105003264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:19,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:19,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:22:19,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039886156] [2021-12-28 02:22:19,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:19,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:22:19,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:19,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:22:19,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:22:19,725 INFO L87 Difference]: Start difference. First operand 2169 states and 3789 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2021-12-28 02:22:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:19,951 INFO L93 Difference]: Finished difference Result 2787 states and 4753 transitions. [2021-12-28 02:22:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 02:22:19,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 [2021-12-28 02:22:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:19,961 INFO L225 Difference]: With dead ends: 2787 [2021-12-28 02:22:19,961 INFO L226 Difference]: Without dead ends: 2171 [2021-12-28 02:22:19,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:22:19,964 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 7775 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7775 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:19,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7775 Valid, 2058 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:22:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-12-28 02:22:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2021-12-28 02:22:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2167 states have (on average 1.7457314259344716) internal successors, (3783), 2168 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3783 transitions. [2021-12-28 02:22:20,038 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3783 transitions. Word has length 79 [2021-12-28 02:22:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:20,039 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3783 transitions. [2021-12-28 02:22:20,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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) [2021-12-28 02:22:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3783 transitions. [2021-12-28 02:22:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-28 02:22:20,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:20,040 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] [2021-12-28 02:22:20,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:22:20,041 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:20,041 INFO L85 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2021-12-28 02:22:20,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:20,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706627923] [2021-12-28 02:22:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:20,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:20,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:20,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706627923] [2021-12-28 02:22:20,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706627923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:20,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:20,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:22:20,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609533282] [2021-12-28 02:22:20,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:20,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:22:20,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:22:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:20,079 INFO L87 Difference]: Start difference. First operand 2169 states and 3783 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) [2021-12-28 02:22:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:20,173 INFO L93 Difference]: Finished difference Result 3329 states and 5577 transitions. [2021-12-28 02:22:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:22:20,174 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 [2021-12-28 02:22:20,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:20,185 INFO L225 Difference]: With dead ends: 3329 [2021-12-28 02:22:20,185 INFO L226 Difference]: Without dead ends: 2713 [2021-12-28 02:22:20,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:20,188 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1508 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:20,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 1726 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:22:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-28 02:22:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-12-28 02:22:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2709 states have (on average 1.70062753783684) internal successors, (4607), 2710 states have internal predecessors, (4607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 4607 transitions. [2021-12-28 02:22:20,305 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 4607 transitions. Word has length 79 [2021-12-28 02:22:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:20,306 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 4607 transitions. [2021-12-28 02:22:20,306 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) [2021-12-28 02:22:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 4607 transitions. [2021-12-28 02:22:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-28 02:22:20,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:20,307 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] [2021-12-28 02:22:20,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:22:20,308 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:20,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:20,308 INFO L85 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2021-12-28 02:22:20,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:20,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266649252] [2021-12-28 02:22:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:20,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:20,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:20,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266649252] [2021-12-28 02:22:20,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266649252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:20,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:20,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:22:20,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516771596] [2021-12-28 02:22:20,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:20,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:22:20,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:20,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:22:20,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:20,357 INFO L87 Difference]: Start difference. First operand 2711 states and 4607 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) [2021-12-28 02:22:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:20,596 INFO L93 Difference]: Finished difference Result 4883 states and 7929 transitions. [2021-12-28 02:22:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:22:20,597 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 [2021-12-28 02:22:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:20,613 INFO L225 Difference]: With dead ends: 4883 [2021-12-28 02:22:20,614 INFO L226 Difference]: Without dead ends: 3725 [2021-12-28 02:22:20,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:20,619 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 1512 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:20,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 1735 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:22:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2021-12-28 02:22:20,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3723. [2021-12-28 02:22:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 3721 states have (on average 1.6455253963988175) internal successors, (6123), 3722 states have internal predecessors, (6123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 6123 transitions. [2021-12-28 02:22:20,818 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 6123 transitions. Word has length 79 [2021-12-28 02:22:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:20,818 INFO L470 AbstractCegarLoop]: Abstraction has 3723 states and 6123 transitions. [2021-12-28 02:22:20,818 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) [2021-12-28 02:22:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 6123 transitions. [2021-12-28 02:22:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-28 02:22:20,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:20,819 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] [2021-12-28 02:22:20,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:22:20,819 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2021-12-28 02:22:20,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:20,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641827949] [2021-12-28 02:22:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:20,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:20,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:20,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641827949] [2021-12-28 02:22:20,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641827949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:20,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:20,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:22:20,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425401620] [2021-12-28 02:22:20,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:20,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:22:20,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:22:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:20,845 INFO L87 Difference]: Start difference. First operand 3723 states and 6123 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) [2021-12-28 02:22:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:21,071 INFO L93 Difference]: Finished difference Result 7775 states and 12237 transitions. [2021-12-28 02:22:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:22:21,072 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 [2021-12-28 02:22:21,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:21,090 INFO L225 Difference]: With dead ends: 7775 [2021-12-28 02:22:21,090 INFO L226 Difference]: Without dead ends: 5605 [2021-12-28 02:22:21,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:21,098 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 1516 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:21,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1744 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:22:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2021-12-28 02:22:21,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5603. [2021-12-28 02:22:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 5601 states have (on average 1.5873951080164257) internal successors, (8891), 5602 states have internal predecessors, (8891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8891 transitions. [2021-12-28 02:22:21,441 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8891 transitions. Word has length 79 [2021-12-28 02:22:21,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:21,442 INFO L470 AbstractCegarLoop]: Abstraction has 5603 states and 8891 transitions. [2021-12-28 02:22:21,442 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) [2021-12-28 02:22:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8891 transitions. [2021-12-28 02:22:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-28 02:22:21,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:21,443 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] [2021-12-28 02:22:21,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:22:21,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:21,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:21,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2021-12-28 02:22:21,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:21,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463588805] [2021-12-28 02:22:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:21,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:21,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:21,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463588805] [2021-12-28 02:22:21,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463588805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:21,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:21,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:22:21,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303636502] [2021-12-28 02:22:21,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:21,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:22:21,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:21,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:22:21,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:21,472 INFO L87 Difference]: Start difference. First operand 5603 states and 8891 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) [2021-12-28 02:22:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:21,961 INFO L93 Difference]: Finished difference Result 13127 states and 20061 transitions. [2021-12-28 02:22:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:22:21,962 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 [2021-12-28 02:22:21,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:21,983 INFO L225 Difference]: With dead ends: 13127 [2021-12-28 02:22:21,984 INFO L226 Difference]: Without dead ends: 9077 [2021-12-28 02:22:21,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:22:21,993 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 1520 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:21,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:22:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2021-12-28 02:22:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 9075. [2021-12-28 02:22:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9075 states, 9073 states have (on average 1.531907858481208) internal successors, (13899), 9074 states have internal predecessors, (13899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 13899 transitions. [2021-12-28 02:22:22,619 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 13899 transitions. Word has length 79 [2021-12-28 02:22:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:22,619 INFO L470 AbstractCegarLoop]: Abstraction has 9075 states and 13899 transitions. [2021-12-28 02:22:22,620 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) [2021-12-28 02:22:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 13899 transitions. [2021-12-28 02:22:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-28 02:22:22,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:22,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:22:22,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:22:22,621 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:22,622 INFO L85 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2021-12-28 02:22:22,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:22,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587245687] [2021-12-28 02:22:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:22,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:22,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:22,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587245687] [2021-12-28 02:22:22,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587245687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:22,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:22,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:22:22,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865148607] [2021-12-28 02:22:22,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:22,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:22:22,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:22,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:22:22,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:22:22,704 INFO L87 Difference]: Start difference. First operand 9075 states and 13899 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:24,019 INFO L93 Difference]: Finished difference Result 15538 states and 23170 transitions. [2021-12-28 02:22:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:22:24,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-28 02:22:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:24,048 INFO L225 Difference]: With dead ends: 15538 [2021-12-28 02:22:24,048 INFO L226 Difference]: Without dead ends: 15536 [2021-12-28 02:22:24,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:22:24,052 INFO L933 BasicCegarLoop]: 1609 mSDtfsCounter, 730 mSDsluCounter, 9164 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 10773 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:24,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 10773 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:22:24,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2021-12-28 02:22:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 9459. [2021-12-28 02:22:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9459 states, 9457 states have (on average 1.5069260864967748) internal successors, (14251), 9458 states have internal predecessors, (14251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 14251 transitions. [2021-12-28 02:22:24,761 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 14251 transitions. Word has length 80 [2021-12-28 02:22:24,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:24,762 INFO L470 AbstractCegarLoop]: Abstraction has 9459 states and 14251 transitions. [2021-12-28 02:22:24,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:24,762 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 14251 transitions. [2021-12-28 02:22:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 02:22:24,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:24,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:22:24,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:22:24,763 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:24,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1948928744, now seen corresponding path program 1 times [2021-12-28 02:22:24,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:24,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777382879] [2021-12-28 02:22:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:24,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:24,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:24,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777382879] [2021-12-28 02:22:24,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777382879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:24,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:24,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:22:24,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97209651] [2021-12-28 02:22:24,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:24,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:22:24,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:24,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:22:24,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:22:24,821 INFO L87 Difference]: Start difference. First operand 9459 states and 14251 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:29,923 INFO L93 Difference]: Finished difference Result 13216 states and 21141 transitions. [2021-12-28 02:22:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 02:22:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-28 02:22:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:29,945 INFO L225 Difference]: With dead ends: 13216 [2021-12-28 02:22:29,945 INFO L226 Difference]: Without dead ends: 11712 [2021-12-28 02:22:29,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:22:29,952 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 2452 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5154 mSolverCounterSat, 1153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 6307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1153 IncrementalHoareTripleChecker+Valid, 5154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:29,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2452 Valid, 852 Invalid, 6307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1153 Valid, 5154 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-28 02:22:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11712 states. [2021-12-28 02:22:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11712 to 11712. [2021-12-28 02:22:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11712 states, 11710 states have (on average 1.484201537147737) internal successors, (17380), 11711 states have internal predecessors, (17380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11712 states to 11712 states and 17380 transitions. [2021-12-28 02:22:30,713 INFO L78 Accepts]: Start accepts. Automaton has 11712 states and 17380 transitions. Word has length 93 [2021-12-28 02:22:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:30,713 INFO L470 AbstractCegarLoop]: Abstraction has 11712 states and 17380 transitions. [2021-12-28 02:22:30,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 11712 states and 17380 transitions. [2021-12-28 02:22:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-28 02:22:30,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:30,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:22:30,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:22:30,715 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1319567043, now seen corresponding path program 1 times [2021-12-28 02:22:30,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:30,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117549454] [2021-12-28 02:22:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:30,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:30,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:30,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117549454] [2021-12-28 02:22:30,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117549454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:22:30,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92897665] [2021-12-28 02:22:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:30,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:22:30,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:22:30,816 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) [2021-12-28 02:22:30,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:22:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:30,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:22:30,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:22:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:22:31,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:22:31,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92897665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:31,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:22:31,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-28 02:22:31,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145734734] [2021-12-28 02:22:31,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:31,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:22:31,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:22:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:22:31,047 INFO L87 Difference]: Start difference. First operand 11712 states and 17380 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:33,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:33,880 INFO L93 Difference]: Finished difference Result 18473 states and 28432 transitions. [2021-12-28 02:22:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:22:33,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-12-28 02:22:33,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:33,938 INFO L225 Difference]: With dead ends: 18473 [2021-12-28 02:22:33,939 INFO L226 Difference]: Without dead ends: 14716 [2021-12-28 02:22:33,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:22:33,963 INFO L933 BasicCegarLoop]: 1111 mSDtfsCounter, 767 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 3065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:33,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 1260 Invalid, 3065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 2319 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-28 02:22:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14716 states. [2021-12-28 02:22:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14716 to 14716. [2021-12-28 02:22:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14716 states, 14714 states have (on average 1.485659915726519) internal successors, (21860), 14715 states have internal predecessors, (21860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14716 states to 14716 states and 21860 transitions. [2021-12-28 02:22:34,770 INFO L78 Accepts]: Start accepts. Automaton has 14716 states and 21860 transitions. Word has length 95 [2021-12-28 02:22:34,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:34,770 INFO L470 AbstractCegarLoop]: Abstraction has 14716 states and 21860 transitions. [2021-12-28 02:22:34,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 14716 states and 21860 transitions. [2021-12-28 02:22:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 02:22:34,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:34,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:22:34,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 02:22:34,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 02:22:34,994 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:34,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2021-12-28 02:22:34,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:34,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902354424] [2021-12-28 02:22:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:34,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 02:22:35,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:35,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902354424] [2021-12-28 02:22:35,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902354424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:35,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:35,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:22:35,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063471078] [2021-12-28 02:22:35,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:35,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:22:35,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:35,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:22:35,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:22:35,085 INFO L87 Difference]: Start difference. First operand 14716 states and 21860 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:38,166 INFO L93 Difference]: Finished difference Result 63722 states and 92571 transitions. [2021-12-28 02:22:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 02:22:38,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 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 112 [2021-12-28 02:22:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:38,264 INFO L225 Difference]: With dead ends: 63722 [2021-12-28 02:22:38,265 INFO L226 Difference]: Without dead ends: 55816 [2021-12-28 02:22:38,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 02:22:38,286 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8615 mSDsluCounter, 2152 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8615 SdHoareTripleChecker+Valid, 3817 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:38,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8615 Valid, 3817 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:22:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55816 states. [2021-12-28 02:22:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55816 to 22620. [2021-12-28 02:22:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22620 states, 22618 states have (on average 1.4673269077725706) internal successors, (33188), 22619 states have internal predecessors, (33188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22620 states to 22620 states and 33188 transitions. [2021-12-28 02:22:39,747 INFO L78 Accepts]: Start accepts. Automaton has 22620 states and 33188 transitions. Word has length 112 [2021-12-28 02:22:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:39,749 INFO L470 AbstractCegarLoop]: Abstraction has 22620 states and 33188 transitions. [2021-12-28 02:22:39,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 22620 states and 33188 transitions. [2021-12-28 02:22:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 02:22:39,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:39,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:22:39,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:22:39,759 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:39,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:39,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2021-12-28 02:22:39,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:39,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809705887] [2021-12-28 02:22:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:39,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 02:22:39,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:39,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809705887] [2021-12-28 02:22:39,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809705887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:39,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:39,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:22:39,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595198453] [2021-12-28 02:22:39,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:39,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:22:39,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:39,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:22:39,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:22:39,884 INFO L87 Difference]: Start difference. First operand 22620 states and 33188 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:44,308 INFO L93 Difference]: Finished difference Result 71626 states and 103899 transitions. [2021-12-28 02:22:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 02:22:44,308 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 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 112 [2021-12-28 02:22:44,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:44,409 INFO L225 Difference]: With dead ends: 71626 [2021-12-28 02:22:44,409 INFO L226 Difference]: Without dead ends: 63720 [2021-12-28 02:22:44,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 02:22:44,433 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8440 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8440 SdHoareTripleChecker+Valid, 3881 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:44,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8440 Valid, 3881 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:22:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63720 states. [2021-12-28 02:22:47,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63720 to 34492. [2021-12-28 02:22:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34492 states, 34490 states have (on average 1.4525949550594375) internal successors, (50100), 34491 states have internal predecessors, (50100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:47,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34492 states to 34492 states and 50100 transitions. [2021-12-28 02:22:47,195 INFO L78 Accepts]: Start accepts. Automaton has 34492 states and 50100 transitions. Word has length 112 [2021-12-28 02:22:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:47,195 INFO L470 AbstractCegarLoop]: Abstraction has 34492 states and 50100 transitions. [2021-12-28 02:22:47,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 34492 states and 50100 transitions. [2021-12-28 02:22:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 02:22:47,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:47,203 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:22:47,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:22:47,203 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2021-12-28 02:22:47,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:47,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533788880] [2021-12-28 02:22:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:47,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 02:22:47,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533788880] [2021-12-28 02:22:47,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533788880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:47,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:47,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:22:47,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604221250] [2021-12-28 02:22:47,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:47,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:22:47,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:47,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:22:47,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:22:47,268 INFO L87 Difference]: Start difference. First operand 34492 states and 50100 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:53,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:22:53,068 INFO L93 Difference]: Finished difference Result 79530 states and 115227 transitions. [2021-12-28 02:22:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 02:22:53,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 112 [2021-12-28 02:22:53,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:22:53,229 INFO L225 Difference]: With dead ends: 79530 [2021-12-28 02:22:53,229 INFO L226 Difference]: Without dead ends: 71624 [2021-12-28 02:22:53,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 02:22:53,262 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8408 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8408 SdHoareTripleChecker+Valid, 3921 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:22:53,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8408 Valid, 3921 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:22:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71624 states. [2021-12-28 02:22:56,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71624 to 42396. [2021-12-28 02:22:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42396 states, 42394 states have (on average 1.448978629051281) internal successors, (61428), 42395 states have internal predecessors, (61428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42396 states to 42396 states and 61428 transitions. [2021-12-28 02:22:56,669 INFO L78 Accepts]: Start accepts. Automaton has 42396 states and 61428 transitions. Word has length 112 [2021-12-28 02:22:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:22:56,670 INFO L470 AbstractCegarLoop]: Abstraction has 42396 states and 61428 transitions. [2021-12-28 02:22:56,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:22:56,670 INFO L276 IsEmpty]: Start isEmpty. Operand 42396 states and 61428 transitions. [2021-12-28 02:22:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 02:22:56,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:22:56,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:22:56,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:22:56,709 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:22:56,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:22:56,710 INFO L85 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2021-12-28 02:22:56,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:22:56,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966817303] [2021-12-28 02:22:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:22:56,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:22:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:22:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 02:22:56,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:22:56,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966817303] [2021-12-28 02:22:56,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966817303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:22:56,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:22:56,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:22:56,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551538819] [2021-12-28 02:22:56,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:22:56,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:22:56,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:22:56,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:22:56,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:22:56,813 INFO L87 Difference]: Start difference. First operand 42396 states and 61428 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:23:05,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:23:05,142 INFO L93 Difference]: Finished difference Result 87434 states and 126555 transitions. [2021-12-28 02:23:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 02:23:05,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 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 112 [2021-12-28 02:23:05,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:23:05,266 INFO L225 Difference]: With dead ends: 87434 [2021-12-28 02:23:05,266 INFO L226 Difference]: Without dead ends: 79528 [2021-12-28 02:23:05,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 02:23:05,290 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8478 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8478 SdHoareTripleChecker+Valid, 3918 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:23:05,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8478 Valid, 3918 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:23:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79528 states. [2021-12-28 02:23:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79528 to 50300. [2021-12-28 02:23:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50300 states, 50298 states have (on average 1.4464988667541452) internal successors, (72756), 50299 states have internal predecessors, (72756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:23:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50300 states to 50300 states and 72756 transitions. [2021-12-28 02:23:10,654 INFO L78 Accepts]: Start accepts. Automaton has 50300 states and 72756 transitions. Word has length 112 [2021-12-28 02:23:10,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:23:10,655 INFO L470 AbstractCegarLoop]: Abstraction has 50300 states and 72756 transitions. [2021-12-28 02:23:10,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:23:10,655 INFO L276 IsEmpty]: Start isEmpty. Operand 50300 states and 72756 transitions. [2021-12-28 02:23:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 02:23:10,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:23:10,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:23:10,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:23:10,669 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:23:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:23:10,669 INFO L85 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2021-12-28 02:23:10,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:23:10,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860477495] [2021-12-28 02:23:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:23:10,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:23:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:23:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 02:23:10,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:23:10,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860477495] [2021-12-28 02:23:10,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860477495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:23:10,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:23:10,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:23:10,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361008579] [2021-12-28 02:23:10,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:23:10,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:23:10,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:23:10,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:23:10,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:23:10,747 INFO L87 Difference]: Start difference. First operand 50300 states and 72756 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)