./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro --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 2e89791a2e8bde62b11f5e3f45edc8f6b1d8831a0e105552a6da22a3ff44c454 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:31:50,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:31:50,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:31:50,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:31:50,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:31:50,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:31:50,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:31:50,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:31:50,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:31:50,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:31:50,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:31:50,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:31:50,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:31:50,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:31:50,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:31:50,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:31:50,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:31:50,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:31:50,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:31:50,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:31:50,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:31:50,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:31:50,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:31:50,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:31:50,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:31:50,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:31:50,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:31:50,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:31:50,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:31:50,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:31:50,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:31:50,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:31:50,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:31:50,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:31:50,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:31:50,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:31:50,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:31:50,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:31:50,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:31:50,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:31:50,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:31:50,700 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:31:50,748 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:31:50,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:31:50,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:31:50,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:31:50,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:31:50,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:31:50,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:31:50,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:31:50,752 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:31:50,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:31:50,753 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:31:50,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:31:50,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:31:50,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:31:50,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:31:50,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:31:50,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:31:50,755 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:31:50,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:31:50,756 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:31:50,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:31:50,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:31:50,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:31:50,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:31:50,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:31:50,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:31:50,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:31:50,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:31:50,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:31:50,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:31:50,759 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:31:50,759 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:31:50,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:31:50,760 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e89791a2e8bde62b11f5e3f45edc8f6b1d8831a0e105552a6da22a3ff44c454 [2022-11-18 19:31:51,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:31:51,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:31:51,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:31:51,110 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:31:51,111 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:31:51,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c [2022-11-18 19:31:51,193 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/data/83c1af750/a261ff3c2a314fab9668070215b21c04/FLAGd1669db6f [2022-11-18 19:31:51,838 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:31:51,844 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/sv-benchmarks/c/seq-mthreaded/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c [2022-11-18 19:31:51,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/data/83c1af750/a261ff3c2a314fab9668070215b21c04/FLAGd1669db6f [2022-11-18 19:31:52,164 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/data/83c1af750/a261ff3c2a314fab9668070215b21c04 [2022-11-18 19:31:52,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:31:52,169 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:31:52,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:31:52,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:31:52,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:31:52,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e9462b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52, skipping insertion in model container [2022-11-18 19:31:52,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:31:52,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:31:52,492 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/sv-benchmarks/c/seq-mthreaded/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c[15177,15190] [2022-11-18 19:31:52,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:31:52,509 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:31:52,611 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/sv-benchmarks/c/seq-mthreaded/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c[15177,15190] [2022-11-18 19:31:52,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:31:52,637 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:31:52,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52 WrapperNode [2022-11-18 19:31:52,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:31:52,639 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:31:52,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:31:52,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:31:52,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,709 INFO L138 Inliner]: procedures = 26, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 364 [2022-11-18 19:31:52,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:31:52,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:31:52,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:31:52,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:31:52,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:31:52,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:31:52,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:31:52,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:31:52,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52" (1/1) ... [2022-11-18 19:31:52,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:31:52,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:31:52,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:31:52,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5169a242-cc77-4bd1-9613-47c6e6d87764/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:31:52,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:31:52,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:31:52,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:31:52,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:31:52,972 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:31:52,974 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:31:53,739 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:31:53,747 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:31:53,749 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 19:31:53,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:31:53 BoogieIcfgContainer [2022-11-18 19:31:53,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:31:53,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:31:53,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:31:53,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:31:53,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:31:52" (1/3) ... [2022-11-18 19:31:53,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663e598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:31:53, skipping insertion in model container [2022-11-18 19:31:53,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:52" (2/3) ... [2022-11-18 19:31:53,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663e598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:31:53, skipping insertion in model container [2022-11-18 19:31:53,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:31:53" (3/3) ... [2022-11-18 19:31:53,772 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c [2022-11-18 19:31:53,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:31:53,795 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:31:53,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:31:53,891 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2d03e56b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:31:53,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:31:53,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 96 states have (on average 1.7708333333333333) internal successors, (170), 97 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:31:53,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:31:53,911 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:31:53,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:31:53,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:31:53,920 INFO L85 PathProgramCache]: Analyzing trace with hash 203642846, now seen corresponding path program 1 times [2022-11-18 19:31:53,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:31:53,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060547897] [2022-11-18 19:31:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:31:53,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:31:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:31:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:31:54,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:31:54,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060547897] [2022-11-18 19:31:54,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060547897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:31:54,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:31:54,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:31:54,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026616274] [2022-11-18 19:31:54,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:31:54,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:31:54,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:31:54,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:31:54,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:31:54,327 INFO L87 Difference]: Start difference. First operand has 98 states, 96 states have (on average 1.7708333333333333) internal successors, (170), 97 states have internal predecessors, (170), 0 states have call successors, (0), 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 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:54,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:31:54,379 INFO L93 Difference]: Finished difference Result 147 states and 251 transitions. [2022-11-18 19:31:54,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:31:54,381 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-11-18 19:31:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:31:54,398 INFO L225 Difference]: With dead ends: 147 [2022-11-18 19:31:54,399 INFO L226 Difference]: Without dead ends: 94 [2022-11-18 19:31:54,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:31:54,409 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:31:54,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:31:54,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-18 19:31:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-18 19:31:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.7526881720430108) internal successors, (163), 93 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 163 transitions. [2022-11-18 19:31:54,490 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 163 transitions. Word has length 25 [2022-11-18 19:31:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:31:54,491 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 163 transitions. [2022-11-18 19:31:54,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 163 transitions. [2022-11-18 19:31:54,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:31:54,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:31:54,498 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:31:54,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:31:54,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:31:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:31:54,500 INFO L85 PathProgramCache]: Analyzing trace with hash -614005604, now seen corresponding path program 1 times [2022-11-18 19:31:54,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:31:54,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547235246] [2022-11-18 19:31:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:31:54,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:31:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:31:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:31:54,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:31:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547235246] [2022-11-18 19:31:54,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547235246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:31:54,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:31:54,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:31:54,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696628378] [2022-11-18 19:31:54,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:31:54,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:31:54,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:31:54,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:31:54,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:31:54,858 INFO L87 Difference]: Start difference. First operand 94 states and 163 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:55,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:31:55,076 INFO L93 Difference]: Finished difference Result 146 states and 244 transitions. [2022-11-18 19:31:55,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:31:55,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-11-18 19:31:55,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:31:55,077 INFO L225 Difference]: With dead ends: 146 [2022-11-18 19:31:55,078 INFO L226 Difference]: Without dead ends: 94 [2022-11-18 19:31:55,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:31:55,080 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 3 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:31:55,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 601 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:31:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-18 19:31:55,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-18 19:31:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3225806451612903) internal successors, (123), 93 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:55,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 123 transitions. [2022-11-18 19:31:55,087 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 123 transitions. Word has length 25 [2022-11-18 19:31:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:31:55,088 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 123 transitions. [2022-11-18 19:31:55,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 123 transitions. [2022-11-18 19:31:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 19:31:55,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:31:55,090 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:31:55,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:31:55,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:31:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:31:55,091 INFO L85 PathProgramCache]: Analyzing trace with hash 877370829, now seen corresponding path program 1 times [2022-11-18 19:31:55,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:31:55,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826813310] [2022-11-18 19:31:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:31:55,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:31:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:31:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:31:55,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:31:55,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826813310] [2022-11-18 19:31:55,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826813310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:31:55,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:31:55,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 19:31:55,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833065916] [2022-11-18 19:31:55,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:31:55,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:31:55,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:31:55,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:31:55,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:31:55,464 INFO L87 Difference]: Start difference. First operand 94 states and 123 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:31:55,996 INFO L93 Difference]: Finished difference Result 670 states and 1047 transitions. [2022-11-18 19:31:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:31:55,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-18 19:31:55,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:31:56,006 INFO L225 Difference]: With dead ends: 670 [2022-11-18 19:31:56,007 INFO L226 Difference]: Without dead ends: 622 [2022-11-18 19:31:56,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:31:56,016 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1065 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 2253 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:31:56,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 2253 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:31:56,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-11-18 19:31:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 140. [2022-11-18 19:31:56,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.4172661870503598) internal successors, (197), 139 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 197 transitions. [2022-11-18 19:31:56,073 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 197 transitions. Word has length 64 [2022-11-18 19:31:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:31:56,074 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 197 transitions. [2022-11-18 19:31:56,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 197 transitions. [2022-11-18 19:31:56,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-18 19:31:56,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:31:56,078 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:31:56,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:31:56,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:31:56,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:31:56,080 INFO L85 PathProgramCache]: Analyzing trace with hash -75917667, now seen corresponding path program 1 times [2022-11-18 19:31:56,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:31:56,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961318753] [2022-11-18 19:31:56,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:31:56,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:31:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:31:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:31:56,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:31:56,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961318753] [2022-11-18 19:31:56,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961318753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:31:56,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:31:56,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:31:56,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354923593] [2022-11-18 19:31:56,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:31:56,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:31:56,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:31:56,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:31:56,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:31:56,218 INFO L87 Difference]: Start difference. First operand 140 states and 197 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:31:56,255 INFO L93 Difference]: Finished difference Result 317 states and 480 transitions. [2022-11-18 19:31:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:31:56,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-18 19:31:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:31:56,258 INFO L225 Difference]: With dead ends: 317 [2022-11-18 19:31:56,258 INFO L226 Difference]: Without dead ends: 223 [2022-11-18 19:31:56,260 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:31:56,271 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 51 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 193 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 [2022-11-18 19:31:56,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 193 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:31:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-18 19:31:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2022-11-18 19:31:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.4772727272727273) internal successors, (325), 220 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 325 transitions. [2022-11-18 19:31:56,308 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 325 transitions. Word has length 66 [2022-11-18 19:31:56,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:31:56,311 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 325 transitions. [2022-11-18 19:31:56,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 325 transitions. [2022-11-18 19:31:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-18 19:31:56,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:31:56,322 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:31:56,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:31:56,322 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:31:56,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:31:56,323 INFO L85 PathProgramCache]: Analyzing trace with hash -9424155, now seen corresponding path program 1 times [2022-11-18 19:31:56,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:31:56,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206089139] [2022-11-18 19:31:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:31:56,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:31:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:31:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:31:56,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:31:56,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206089139] [2022-11-18 19:31:56,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206089139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:31:56,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:31:56,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 19:31:56,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851029553] [2022-11-18 19:31:56,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:31:56,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:31:56,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:31:56,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:31:56,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:31:56,924 INFO L87 Difference]: Start difference. First operand 221 states and 325 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:31:57,334 INFO L93 Difference]: Finished difference Result 398 states and 605 transitions. [2022-11-18 19:31:57,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:31:57,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-18 19:31:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:31:57,337 INFO L225 Difference]: With dead ends: 398 [2022-11-18 19:31:57,337 INFO L226 Difference]: Without dead ends: 223 [2022-11-18 19:31:57,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:31:57,343 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 490 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:31:57,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 483 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:31:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-18 19:31:57,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2022-11-18 19:31:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.4681818181818183) internal successors, (323), 220 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 323 transitions. [2022-11-18 19:31:57,392 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 323 transitions. Word has length 66 [2022-11-18 19:31:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:31:57,395 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 323 transitions. [2022-11-18 19:31:57,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 323 transitions. [2022-11-18 19:31:57,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 19:31:57,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:31:57,404 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:31:57,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:31:57,405 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:31:57,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:31:57,407 INFO L85 PathProgramCache]: Analyzing trace with hash -706871807, now seen corresponding path program 1 times [2022-11-18 19:31:57,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:31:57,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952863818] [2022-11-18 19:31:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:31:57,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:31:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:31:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:31:57,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:31:57,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952863818] [2022-11-18 19:31:57,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952863818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:31:57,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:31:57,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:31:57,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730438649] [2022-11-18 19:31:57,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:31:57,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:31:57,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:31:57,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:31:57,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:31:57,772 INFO L87 Difference]: Start difference. First operand 221 states and 323 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:31:57,923 INFO L93 Difference]: Finished difference Result 393 states and 590 transitions. [2022-11-18 19:31:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:31:57,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2022-11-18 19:31:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:31:57,928 INFO L225 Difference]: With dead ends: 393 [2022-11-18 19:31:57,928 INFO L226 Difference]: Without dead ends: 391 [2022-11-18 19:31:57,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:31:57,930 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 202 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:31:57,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 562 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:31:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-18 19:31:57,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 227. [2022-11-18 19:31:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.4513274336283186) internal successors, (328), 226 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:57,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 328 transitions. [2022-11-18 19:31:57,970 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 328 transitions. Word has length 67 [2022-11-18 19:31:57,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:31:57,970 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 328 transitions. [2022-11-18 19:31:57,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:57,971 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 328 transitions. [2022-11-18 19:31:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:31:57,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:31:57,972 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:31:57,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 19:31:57,973 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:31:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:31:57,973 INFO L85 PathProgramCache]: Analyzing trace with hash -227657403, now seen corresponding path program 1 times [2022-11-18 19:31:57,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:31:57,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330538264] [2022-11-18 19:31:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:31:57,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:31:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:31:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:31:58,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:31:58,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330538264] [2022-11-18 19:31:58,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330538264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:31:58,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:31:58,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:31:58,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715253788] [2022-11-18 19:31:58,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:31:58,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:31:58,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:31:58,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:31:58,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:31:58,054 INFO L87 Difference]: Start difference. First operand 227 states and 328 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:31:58,104 INFO L93 Difference]: Finished difference Result 421 states and 629 transitions. [2022-11-18 19:31:58,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:31:58,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-18 19:31:58,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:31:58,107 INFO L225 Difference]: With dead ends: 421 [2022-11-18 19:31:58,107 INFO L226 Difference]: Without dead ends: 321 [2022-11-18 19:31:58,107 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:31:58,108 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 67 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:31:58,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 263 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:31:58,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-18 19:31:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 319. [2022-11-18 19:31:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.4748427672955975) internal successors, (469), 318 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 469 transitions. [2022-11-18 19:31:58,147 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 469 transitions. Word has length 68 [2022-11-18 19:31:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:31:58,148 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 469 transitions. [2022-11-18 19:31:58,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 469 transitions. [2022-11-18 19:31:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:31:58,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:31:58,149 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:31:58,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:31:58,150 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:31:58,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:31:58,150 INFO L85 PathProgramCache]: Analyzing trace with hash -64742843, now seen corresponding path program 1 times [2022-11-18 19:31:58,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:31:58,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007425092] [2022-11-18 19:31:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:31:58,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:31:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:31:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:31:58,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:31:58,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007425092] [2022-11-18 19:31:58,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007425092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:31:58,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:31:58,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:31:58,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452692330] [2022-11-18 19:31:58,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:31:58,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:31:58,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:31:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:31:58,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:31:58,236 INFO L87 Difference]: Start difference. First operand 319 states and 469 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:31:58,332 INFO L93 Difference]: Finished difference Result 837 states and 1269 transitions. [2022-11-18 19:31:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:31:58,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-18 19:31:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:31:58,338 INFO L225 Difference]: With dead ends: 837 [2022-11-18 19:31:58,338 INFO L226 Difference]: Without dead ends: 566 [2022-11-18 19:31:58,339 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:31:58,340 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 65 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:31:58,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 269 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:31:58,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-18 19:31:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 564. [2022-11-18 19:31:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.4937833037300177) internal successors, (841), 563 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 841 transitions. [2022-11-18 19:31:58,428 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 841 transitions. Word has length 68 [2022-11-18 19:31:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:31:58,429 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 841 transitions. [2022-11-18 19:31:58,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 841 transitions. [2022-11-18 19:31:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:31:58,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:31:58,433 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:31:58,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 19:31:58,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:31:58,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:31:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1437375557, now seen corresponding path program 1 times [2022-11-18 19:31:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:31:58,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838695167] [2022-11-18 19:31:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:31:58,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:31:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:31:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:31:58,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:31:58,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838695167] [2022-11-18 19:31:58,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838695167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:31:58,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:31:58,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:31:58,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395232305] [2022-11-18 19:31:58,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:31:58,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:31:58,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:31:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:31:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:31:58,542 INFO L87 Difference]: Start difference. First operand 564 states and 841 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:58,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:31:58,749 INFO L93 Difference]: Finished difference Result 1548 states and 2343 transitions. [2022-11-18 19:31:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:31:58,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-18 19:31:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:31:58,754 INFO L225 Difference]: With dead ends: 1548 [2022-11-18 19:31:58,755 INFO L226 Difference]: Without dead ends: 1032 [2022-11-18 19:31:58,756 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:31:58,759 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 61 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:31:58,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 265 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:31:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-11-18 19:31:58,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1030. [2022-11-18 19:31:58,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 1.4936831875607386) internal successors, (1537), 1029 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1537 transitions. [2022-11-18 19:31:58,929 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1537 transitions. Word has length 68 [2022-11-18 19:31:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:31:58,929 INFO L495 AbstractCegarLoop]: Abstraction has 1030 states and 1537 transitions. [2022-11-18 19:31:58,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:58,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1537 transitions. [2022-11-18 19:31:58,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:31:58,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:31:58,935 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:31:58,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 19:31:58,935 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:31:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:31:58,941 INFO L85 PathProgramCache]: Analyzing trace with hash -778093243, now seen corresponding path program 1 times [2022-11-18 19:31:58,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:31:58,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957496552] [2022-11-18 19:31:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:31:58,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:31:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:31:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:31:59,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:31:59,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957496552] [2022-11-18 19:31:59,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957496552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:31:59,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:31:59,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:31:59,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075418070] [2022-11-18 19:31:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:31:59,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:31:59,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:31:59,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:31:59,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:31:59,030 INFO L87 Difference]: Start difference. First operand 1030 states and 1537 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:59,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:31:59,348 INFO L93 Difference]: Finished difference Result 2898 states and 4347 transitions. [2022-11-18 19:31:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:31:59,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-18 19:31:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:31:59,356 INFO L225 Difference]: With dead ends: 2898 [2022-11-18 19:31:59,357 INFO L226 Difference]: Without dead ends: 1916 [2022-11-18 19:31:59,358 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:31:59,359 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 59 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:31:59,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 267 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:31:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2022-11-18 19:31:59,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1914. [2022-11-18 19:31:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 1.480920020909566) internal successors, (2833), 1913 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2833 transitions. [2022-11-18 19:31:59,695 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2833 transitions. Word has length 68 [2022-11-18 19:31:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:31:59,695 INFO L495 AbstractCegarLoop]: Abstraction has 1914 states and 2833 transitions. [2022-11-18 19:31:59,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:31:59,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2833 transitions. [2022-11-18 19:31:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:31:59,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:31:59,696 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:31:59,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 19:31:59,697 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:31:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:31:59,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1002839621, now seen corresponding path program 1 times [2022-11-18 19:31:59,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:31:59,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893780830] [2022-11-18 19:31:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:31:59,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:31:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:31:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:31:59,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:31:59,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893780830] [2022-11-18 19:31:59,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893780830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:31:59,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:31:59,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:31:59,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573612489] [2022-11-18 19:31:59,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:31:59,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:31:59,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:31:59,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:31:59,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:31:59,769 INFO L87 Difference]: Start difference. First operand 1914 states and 2833 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:00,393 INFO L93 Difference]: Finished difference Result 5454 states and 8067 transitions. [2022-11-18 19:32:00,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:00,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-18 19:32:00,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:00,409 INFO L225 Difference]: With dead ends: 5454 [2022-11-18 19:32:00,409 INFO L226 Difference]: Without dead ends: 3588 [2022-11-18 19:32:00,414 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:32:00,415 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 57 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:00,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 269 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:32:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-11-18 19:32:00,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 3586. [2022-11-18 19:32:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3585 states have (on average 1.4596931659693166) internal successors, (5233), 3585 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 5233 transitions. [2022-11-18 19:32:01,018 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 5233 transitions. Word has length 68 [2022-11-18 19:32:01,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:01,019 INFO L495 AbstractCegarLoop]: Abstraction has 3586 states and 5233 transitions. [2022-11-18 19:32:01,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:01,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 5233 transitions. [2022-11-18 19:32:01,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 19:32:01,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:01,020 INFO L195 NwaCegarLoop]: 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] [2022-11-18 19:32:01,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 19:32:01,020 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash 199113541, now seen corresponding path program 1 times [2022-11-18 19:32:01,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:01,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709069180] [2022-11-18 19:32:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:01,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:01,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:01,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709069180] [2022-11-18 19:32:01,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709069180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:01,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:01,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:32:01,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882359701] [2022-11-18 19:32:01,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:01,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:32:01,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:01,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:32:01,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:01,088 INFO L87 Difference]: Start difference. First operand 3586 states and 5233 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:02,307 INFO L93 Difference]: Finished difference Result 10278 states and 14931 transitions. [2022-11-18 19:32:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2022-11-18 19:32:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:02,335 INFO L225 Difference]: With dead ends: 10278 [2022-11-18 19:32:02,335 INFO L226 Difference]: Without dead ends: 6740 [2022-11-18 19:32:02,340 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:32:02,341 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 63 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:02,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 271 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:32:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6740 states. [2022-11-18 19:32:03,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6740 to 6738. [2022-11-18 19:32:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6738 states, 6737 states have (on average 1.4322398693780614) internal successors, (9649), 6737 states have internal predecessors, (9649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6738 states to 6738 states and 9649 transitions. [2022-11-18 19:32:03,455 INFO L78 Accepts]: Start accepts. Automaton has 6738 states and 9649 transitions. Word has length 68 [2022-11-18 19:32:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:03,455 INFO L495 AbstractCegarLoop]: Abstraction has 6738 states and 9649 transitions. [2022-11-18 19:32:03,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand 6738 states and 9649 transitions. [2022-11-18 19:32:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-18 19:32:03,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:03,461 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 19:32:03,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 19:32:03,463 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:03,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:03,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1085081155, now seen corresponding path program 1 times [2022-11-18 19:32:03,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:03,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890953007] [2022-11-18 19:32:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:03,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:32:03,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:03,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890953007] [2022-11-18 19:32:03,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890953007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:03,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:03,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 19:32:03,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282706186] [2022-11-18 19:32:03,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:03,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:32:03,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:03,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:32:03,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:32:03,842 INFO L87 Difference]: Start difference. First operand 6738 states and 9649 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:09,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:09,290 INFO L93 Difference]: Finished difference Result 46336 states and 66424 transitions. [2022-11-18 19:32:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:32:09,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-18 19:32:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:09,456 INFO L225 Difference]: With dead ends: 46336 [2022-11-18 19:32:09,456 INFO L226 Difference]: Without dead ends: 41598 [2022-11-18 19:32:09,471 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:32:09,472 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 886 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:09,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1123 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:32:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41598 states. [2022-11-18 19:32:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41598 to 12466. [2022-11-18 19:32:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12466 states, 12465 states have (on average 1.4261532290413157) internal successors, (17777), 12465 states have internal predecessors, (17777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12466 states to 12466 states and 17777 transitions. [2022-11-18 19:32:12,937 INFO L78 Accepts]: Start accepts. Automaton has 12466 states and 17777 transitions. Word has length 89 [2022-11-18 19:32:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:12,938 INFO L495 AbstractCegarLoop]: Abstraction has 12466 states and 17777 transitions. [2022-11-18 19:32:12,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 12466 states and 17777 transitions. [2022-11-18 19:32:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-18 19:32:12,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:12,944 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 19:32:12,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 19:32:12,945 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:12,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1247995715, now seen corresponding path program 1 times [2022-11-18 19:32:12,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:12,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720566913] [2022-11-18 19:32:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:12,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 19:32:13,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:13,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720566913] [2022-11-18 19:32:13,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720566913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:13,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:13,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 19:32:13,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776896585] [2022-11-18 19:32:13,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:13,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:32:13,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:13,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:32:13,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:32:13,224 INFO L87 Difference]: Start difference. First operand 12466 states and 17777 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:19,968 INFO L93 Difference]: Finished difference Result 53024 states and 75960 transitions. [2022-11-18 19:32:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:32:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 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 89 [2022-11-18 19:32:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:20,255 INFO L225 Difference]: With dead ends: 53024 [2022-11-18 19:32:20,255 INFO L226 Difference]: Without dead ends: 46334 [2022-11-18 19:32:20,269 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:32:20,270 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 888 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:20,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1086 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:32:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46334 states. [2022-11-18 19:32:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46334 to 21522. [2022-11-18 19:32:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21522 states, 21521 states have (on average 1.4222852097950838) internal successors, (30609), 21521 states have internal predecessors, (30609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21522 states to 21522 states and 30609 transitions. [2022-11-18 19:32:24,565 INFO L78 Accepts]: Start accepts. Automaton has 21522 states and 30609 transitions. Word has length 89 [2022-11-18 19:32:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:24,566 INFO L495 AbstractCegarLoop]: Abstraction has 21522 states and 30609 transitions. [2022-11-18 19:32:24,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 21522 states and 30609 transitions. [2022-11-18 19:32:24,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-18 19:32:24,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:24,572 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 19:32:24,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 19:32:24,573 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:24,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:24,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1544853181, now seen corresponding path program 1 times [2022-11-18 19:32:24,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:24,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970286046] [2022-11-18 19:32:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:24,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 19:32:24,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:24,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970286046] [2022-11-18 19:32:24,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970286046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:24,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:24,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 19:32:24,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623778944] [2022-11-18 19:32:24,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:24,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:32:24,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:24,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:32:24,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:32:24,844 INFO L87 Difference]: Start difference. First operand 21522 states and 30609 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:33,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:33,460 INFO L93 Difference]: Finished difference Result 59712 states and 85464 transitions. [2022-11-18 19:32:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:32:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-18 19:32:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:33,606 INFO L225 Difference]: With dead ends: 59712 [2022-11-18 19:32:33,606 INFO L226 Difference]: Without dead ends: 53022 [2022-11-18 19:32:33,622 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:32:33,623 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 930 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:33,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 1103 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:32:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53022 states. [2022-11-18 19:32:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53022 to 28210. [2022-11-18 19:32:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28210 states, 28209 states have (on average 1.4219929809635223) internal successors, (40113), 28209 states have internal predecessors, (40113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28210 states to 28210 states and 40113 transitions. [2022-11-18 19:32:38,612 INFO L78 Accepts]: Start accepts. Automaton has 28210 states and 40113 transitions. Word has length 89 [2022-11-18 19:32:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:38,612 INFO L495 AbstractCegarLoop]: Abstraction has 28210 states and 40113 transitions. [2022-11-18 19:32:38,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 28210 states and 40113 transitions. [2022-11-18 19:32:38,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-18 19:32:38,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:38,619 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 19:32:38,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 19:32:38,619 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:38,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:38,620 INFO L85 PathProgramCache]: Analyzing trace with hash 534645315, now seen corresponding path program 1 times [2022-11-18 19:32:38,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:38,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038251139] [2022-11-18 19:32:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:38,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 19:32:38,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:38,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038251139] [2022-11-18 19:32:38,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038251139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:38,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:38,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 19:32:38,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715818453] [2022-11-18 19:32:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:38,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:32:38,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:32:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:32:38,875 INFO L87 Difference]: Start difference. First operand 28210 states and 40113 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) [2022-11-18 19:32:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:48,714 INFO L93 Difference]: Finished difference Result 66400 states and 94968 transitions. [2022-11-18 19:32:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:32:48,715 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 89 [2022-11-18 19:32:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:48,843 INFO L225 Difference]: With dead ends: 66400 [2022-11-18 19:32:48,843 INFO L226 Difference]: Without dead ends: 59710 [2022-11-18 19:32:48,861 INFO L412 NwaCegarLoop]: 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 [2022-11-18 19:32:48,862 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 983 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:48,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 1087 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:32:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59710 states. [2022-11-18 19:32:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59710 to 34898. [2022-11-18 19:32:54,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34898 states, 34897 states have (on average 1.4218127632747801) internal successors, (49617), 34897 states have internal predecessors, (49617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34898 states to 34898 states and 49617 transitions. [2022-11-18 19:32:54,898 INFO L78 Accepts]: Start accepts. Automaton has 34898 states and 49617 transitions. Word has length 89 [2022-11-18 19:32:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:54,899 INFO L495 AbstractCegarLoop]: Abstraction has 34898 states and 49617 transitions. [2022-11-18 19:32:54,899 INFO L496 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) [2022-11-18 19:32:54,899 INFO L276 IsEmpty]: Start isEmpty. Operand 34898 states and 49617 transitions. [2022-11-18 19:32:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-18 19:32:54,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:54,911 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 19:32:54,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 19:32:54,911 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:32:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1979389117, now seen corresponding path program 1 times [2022-11-18 19:32:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:32:54,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945350934] [2022-11-18 19:32:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:54,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:32:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 19:32:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:32:55,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945350934] [2022-11-18 19:32:55,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945350934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:55,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:55,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 19:32:55,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829457458] [2022-11-18 19:32:55,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:55,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:32:55,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:32:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:32:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:32:55,200 INFO L87 Difference]: Start difference. First operand 34898 states and 49617 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)