./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa --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 fe6bee847a7b573239a2f60b60a87297f25c539812daa07adcb7591b7977879b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:50:54,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:50:54,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:50:54,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:50:54,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:50:54,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:50:54,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:50:54,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:50:54,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:50:54,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:50:54,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:50:54,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:50:54,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:50:54,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:50:54,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:50:54,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:50:54,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:50:54,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:50:54,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:50:54,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:50:54,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:50:54,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:50:54,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:50:54,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:50:54,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:50:54,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:50:54,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:50:54,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:50:54,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:50:54,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:50:54,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:50:54,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:50:54,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:50:54,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:50:54,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:50:54,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:50:54,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:50:54,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:50:54,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:50:54,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:50:54,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:50:54,650 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:50:54,667 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:50:54,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:50:54,667 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:50:54,667 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:50:54,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:50:54,668 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:50:54,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:50:54,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:50:54,668 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:50:54,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:50:54,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:50:54,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:50:54,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:50:54,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:50:54,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:50:54,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:50:54,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:50:54,669 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:50:54,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:50:54,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:50:54,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:50:54,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:50:54,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:50:54,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:50:54,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:50:54,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:50:54,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:50:54,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:50:54,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:50:54,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:50:54,671 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:50:54,671 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:50:54,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:50:54,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:50:54,671 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_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe6bee847a7b573239a2f60b60a87297f25c539812daa07adcb7591b7977879b [2021-12-06 21:50:54,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:50:54,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:50:54,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:50:54,870 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:50:54,870 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:50:54,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c [2021-12-06 21:50:54,914 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/data/f92809cc0/db0a96eb75224f0b8ac7ca1388d8e0b1/FLAGbb434f02a [2021-12-06 21:50:55,311 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:50:55,311 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c [2021-12-06 21:50:55,322 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/data/f92809cc0/db0a96eb75224f0b8ac7ca1388d8e0b1/FLAGbb434f02a [2021-12-06 21:50:55,332 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/data/f92809cc0/db0a96eb75224f0b8ac7ca1388d8e0b1 [2021-12-06 21:50:55,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:50:55,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:50:55,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:50:55,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:50:55,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:50:55,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:50:55" (1/1) ... [2021-12-06 21:50:55,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b9f7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55, skipping insertion in model container [2021-12-06 21:50:55,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:50:55" (1/1) ... [2021-12-06 21:50:55,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:50:55,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:50:55,504 WARN L230 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_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c[913,926] [2021-12-06 21:50:55,534 WARN L230 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_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c[5977,5990] [2021-12-06 21:50:55,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:50:55,605 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:50:55,613 WARN L230 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_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c[913,926] [2021-12-06 21:50:55,623 WARN L230 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_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c[5977,5990] [2021-12-06 21:50:55,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:50:55,674 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:50:55,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55 WrapperNode [2021-12-06 21:50:55,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:50:55,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:50:55,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:50:55,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:50:55,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55" (1/1) ... [2021-12-06 21:50:55,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55" (1/1) ... [2021-12-06 21:50:55,727 INFO L137 Inliner]: procedures = 68, calls = 79, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 944 [2021-12-06 21:50:55,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:50:55,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:50:55,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:50:55,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:50:55,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55" (1/1) ... [2021-12-06 21:50:55,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55" (1/1) ... [2021-12-06 21:50:55,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55" (1/1) ... [2021-12-06 21:50:55,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55" (1/1) ... [2021-12-06 21:50:55,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55" (1/1) ... [2021-12-06 21:50:55,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55" (1/1) ... [2021-12-06 21:50:55,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55" (1/1) ... [2021-12-06 21:50:55,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:50:55,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:50:55,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:50:55,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:50:55,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55" (1/1) ... [2021-12-06 21:50:55,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:50:55,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:50:55,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:50:55,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:50:55,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:50:55,832 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-06 21:50:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-06 21:50:55,832 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-06 21:50:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-06 21:50:55,832 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-06 21:50:55,832 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-06 21:50:55,833 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-06 21:50:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-06 21:50:55,833 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-06 21:50:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-06 21:50:55,833 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-06 21:50:55,833 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-06 21:50:55,833 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-06 21:50:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-06 21:50:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:50:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-06 21:50:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-06 21:50:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:50:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:50:55,834 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-06 21:50:55,834 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-06 21:50:55,835 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-06 21:50:55,835 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-06 21:50:55,931 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:50:55,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:50:56,414 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:50:56,426 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:50:56,427 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-12-06 21:50:56,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:50:56 BoogieIcfgContainer [2021-12-06 21:50:56,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:50:56,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:50:56,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:50:56,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:50:56,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:50:55" (1/3) ... [2021-12-06 21:50:56,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4683aae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:50:56, skipping insertion in model container [2021-12-06 21:50:56,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:50:55" (2/3) ... [2021-12-06 21:50:56,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4683aae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:50:56, skipping insertion in model container [2021-12-06 21:50:56,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:50:56" (3/3) ... [2021-12-06 21:50:56,437 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.10.cil-1.c [2021-12-06 21:50:56,443 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:50:56,443 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 21:50:56,485 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:50:56,492 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 21:50:56,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 21:50:56,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 412 states, 367 states have (on average 1.6457765667574933) internal successors, (604), 374 states have internal predecessors, (604), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-06 21:50:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 21:50:56,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:50:56,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:50:56,519 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:50:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:50:56,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1419459075, now seen corresponding path program 1 times [2021-12-06 21:50:56,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:50:56,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682985058] [2021-12-06 21:50:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:50:56,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:50:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:56,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:50:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:56,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 21:50:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:50:56,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:50:56,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682985058] [2021-12-06 21:50:56,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682985058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:50:56,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:50:56,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:50:56,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404612586] [2021-12-06 21:50:56,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:50:56,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:50:56,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:50:56,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:50:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:50:56,773 INFO L87 Difference]: Start difference. First operand has 412 states, 367 states have (on average 1.6457765667574933) internal successors, (604), 374 states have internal predecessors, (604), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:50:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:50:57,135 INFO L93 Difference]: Finished difference Result 809 states and 1309 transitions. [2021-12-06 21:50:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:50:57,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-06 21:50:57,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:50:57,153 INFO L225 Difference]: With dead ends: 809 [2021-12-06 21:50:57,153 INFO L226 Difference]: Without dead ends: 410 [2021-12-06 21:50:57,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:50:57,163 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 348 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:50:57,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 1239 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:50:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-12-06 21:50:57,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 401. [2021-12-06 21:50:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 359 states have (on average 1.551532033426184) internal successors, (557), 363 states have internal predecessors, (557), 32 states have call successors, (32), 10 states have call predecessors, (32), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-06 21:50:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 617 transitions. [2021-12-06 21:50:57,228 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 617 transitions. Word has length 44 [2021-12-06 21:50:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:50:57,229 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 617 transitions. [2021-12-06 21:50:57,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:50:57,229 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 617 transitions. [2021-12-06 21:50:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 21:50:57,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:50:57,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:50:57,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:50:57,232 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:50:57,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:50:57,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1503700923, now seen corresponding path program 1 times [2021-12-06 21:50:57,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:50:57,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371730257] [2021-12-06 21:50:57,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:50:57,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:50:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:57,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:50:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:57,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-06 21:50:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:50:57,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:50:57,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371730257] [2021-12-06 21:50:57,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371730257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:50:57,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:50:57,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:50:57,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581892848] [2021-12-06 21:50:57,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:50:57,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:50:57,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:50:57,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:50:57,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:50:57,313 INFO L87 Difference]: Start difference. First operand 401 states and 617 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:50:57,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:50:57,446 INFO L93 Difference]: Finished difference Result 531 states and 800 transitions. [2021-12-06 21:50:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:50:57,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-06 21:50:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:50:57,450 INFO L225 Difference]: With dead ends: 531 [2021-12-06 21:50:57,450 INFO L226 Difference]: Without dead ends: 469 [2021-12-06 21:50:57,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:50:57,451 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 829 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:50:57,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 999 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:50:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-12-06 21:50:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 463. [2021-12-06 21:50:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 414 states have (on average 1.5241545893719808) internal successors, (631), 419 states have internal predecessors, (631), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2021-12-06 21:50:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 705 transitions. [2021-12-06 21:50:57,478 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 705 transitions. Word has length 44 [2021-12-06 21:50:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:50:57,478 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 705 transitions. [2021-12-06 21:50:57,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:50:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 705 transitions. [2021-12-06 21:50:57,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 21:50:57,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:50:57,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:50:57,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:50:57,481 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:50:57,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:50:57,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1980433208, now seen corresponding path program 1 times [2021-12-06 21:50:57,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:50:57,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725347472] [2021-12-06 21:50:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:50:57,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:50:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:57,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:50:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:57,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 21:50:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:50:57,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:50:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725347472] [2021-12-06 21:50:57,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725347472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:50:57,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:50:57,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:50:57,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323145111] [2021-12-06 21:50:57,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:50:57,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:50:57,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:50:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:50:57,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:50:57,534 INFO L87 Difference]: Start difference. First operand 463 states and 705 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:50:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:50:57,656 INFO L93 Difference]: Finished difference Result 723 states and 1075 transitions. [2021-12-06 21:50:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:50:57,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-06 21:50:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:50:57,660 INFO L225 Difference]: With dead ends: 723 [2021-12-06 21:50:57,660 INFO L226 Difference]: Without dead ends: 599 [2021-12-06 21:50:57,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:50:57,662 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 846 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:50:57,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1008 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:50:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-12-06 21:50:57,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 574. [2021-12-06 21:50:57,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 512 states have (on average 1.484375) internal successors, (760), 518 states have internal predecessors, (760), 44 states have call successors, (44), 16 states have call predecessors, (44), 16 states have return successors, (52), 40 states have call predecessors, (52), 40 states have call successors, (52) [2021-12-06 21:50:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 856 transitions. [2021-12-06 21:50:57,691 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 856 transitions. Word has length 45 [2021-12-06 21:50:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:50:57,691 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 856 transitions. [2021-12-06 21:50:57,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:50:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 856 transitions. [2021-12-06 21:50:57,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 21:50:57,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:50:57,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:50:57,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:50:57,694 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:50:57,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:50:57,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1030176627, now seen corresponding path program 1 times [2021-12-06 21:50:57,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:50:57,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490469252] [2021-12-06 21:50:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:50:57,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:50:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:57,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:50:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:57,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 21:50:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:50:57,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:50:57,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490469252] [2021-12-06 21:50:57,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490469252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:50:57,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:50:57,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:50:57,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820695955] [2021-12-06 21:50:57,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:50:57,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:50:57,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:50:57,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:50:57,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:50:57,741 INFO L87 Difference]: Start difference. First operand 574 states and 856 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:50:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:50:58,016 INFO L93 Difference]: Finished difference Result 1023 states and 1456 transitions. [2021-12-06 21:50:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:50:58,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-06 21:50:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:50:58,020 INFO L225 Difference]: With dead ends: 1023 [2021-12-06 21:50:58,020 INFO L226 Difference]: Without dead ends: 788 [2021-12-06 21:50:58,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:50:58,022 INFO L933 BasicCegarLoop]: 664 mSDtfsCounter, 325 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:50:58,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 1346 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:50:58,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-12-06 21:50:58,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 672. [2021-12-06 21:50:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 601 states have (on average 1.4608985024958403) internal successors, (878), 609 states have internal predecessors, (878), 48 states have call successors, (48), 21 states have call predecessors, (48), 21 states have return successors, (54), 42 states have call predecessors, (54), 44 states have call successors, (54) [2021-12-06 21:50:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 980 transitions. [2021-12-06 21:50:58,054 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 980 transitions. Word has length 45 [2021-12-06 21:50:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:50:58,054 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 980 transitions. [2021-12-06 21:50:58,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:50:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 980 transitions. [2021-12-06 21:50:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 21:50:58,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:50:58,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:50:58,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:50:58,057 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:50:58,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:50:58,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1097869046, now seen corresponding path program 1 times [2021-12-06 21:50:58,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:50:58,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930049918] [2021-12-06 21:50:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:50:58,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:50:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:50:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 21:50:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 21:50:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:50:58,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:50:58,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930049918] [2021-12-06 21:50:58,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930049918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:50:58,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:50:58,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:50:58,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298171373] [2021-12-06 21:50:58,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:50:58,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:50:58,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:50:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:50:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:50:58,110 INFO L87 Difference]: Start difference. First operand 672 states and 980 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:50:58,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:50:58,397 INFO L93 Difference]: Finished difference Result 1211 states and 1699 transitions. [2021-12-06 21:50:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:50:58,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-06 21:50:58,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:50:58,404 INFO L225 Difference]: With dead ends: 1211 [2021-12-06 21:50:58,404 INFO L226 Difference]: Without dead ends: 878 [2021-12-06 21:50:58,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:50:58,406 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 313 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:50:58,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1373 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:50:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-12-06 21:50:58,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 840. [2021-12-06 21:50:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 748 states have (on average 1.410427807486631) internal successors, (1055), 758 states have internal predecessors, (1055), 60 states have call successors, (60), 28 states have call predecessors, (60), 30 states have return successors, (74), 54 states have call predecessors, (74), 56 states have call successors, (74) [2021-12-06 21:50:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1189 transitions. [2021-12-06 21:50:58,447 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1189 transitions. Word has length 62 [2021-12-06 21:50:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:50:58,448 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1189 transitions. [2021-12-06 21:50:58,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:50:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1189 transitions. [2021-12-06 21:50:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 21:50:58,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:50:58,450 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:50:58,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:50:58,450 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:50:58,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:50:58,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1559344464, now seen corresponding path program 1 times [2021-12-06 21:50:58,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:50:58,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674609686] [2021-12-06 21:50:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:50:58,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:50:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:50:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 21:50:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 21:50:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-06 21:50:58,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:50:58,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674609686] [2021-12-06 21:50:58,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674609686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:50:58,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:50:58,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:50:58,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429371323] [2021-12-06 21:50:58,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:50:58,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:50:58,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:50:58,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:50:58,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:50:58,501 INFO L87 Difference]: Start difference. First operand 840 states and 1189 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:50:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:50:58,645 INFO L93 Difference]: Finished difference Result 1469 states and 2011 transitions. [2021-12-06 21:50:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:50:58,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-06 21:50:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:50:58,650 INFO L225 Difference]: With dead ends: 1469 [2021-12-06 21:50:58,650 INFO L226 Difference]: Without dead ends: 1015 [2021-12-06 21:50:58,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:50:58,652 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 825 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:50:58,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 1021 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:50:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-12-06 21:50:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 960. [2021-12-06 21:50:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 855 states have (on average 1.3812865497076023) internal successors, (1181), 867 states have internal predecessors, (1181), 66 states have call successors, (66), 33 states have call predecessors, (66), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-06 21:50:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1331 transitions. [2021-12-06 21:50:58,698 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1331 transitions. Word has length 67 [2021-12-06 21:50:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:50:58,698 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1331 transitions. [2021-12-06 21:50:58,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:50:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1331 transitions. [2021-12-06 21:50:58,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 21:50:58,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:50:58,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:50:58,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 21:50:58,701 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:50:58,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:50:58,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1116930715, now seen corresponding path program 1 times [2021-12-06 21:50:58,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:50:58,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091742865] [2021-12-06 21:50:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:50:58,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:50:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:50:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 21:50:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 21:50:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:50:58,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:50:58,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091742865] [2021-12-06 21:50:58,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091742865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:50:58,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140965323] [2021-12-06 21:50:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:50:58,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:50:58,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:50:58,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:50:58,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:50:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:58,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 21:50:58,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:50:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:50:58,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:50:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 21:50:59,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140965323] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 21:50:59,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:50:59,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-06 21:50:59,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762316510] [2021-12-06 21:50:59,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:50:59,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:50:59,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:50:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:50:59,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:50:59,035 INFO L87 Difference]: Start difference. First operand 960 states and 1331 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:50:59,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:50:59,163 INFO L93 Difference]: Finished difference Result 1016 states and 1399 transitions. [2021-12-06 21:50:59,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:50:59,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-06 21:50:59,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:50:59,168 INFO L225 Difference]: With dead ends: 1016 [2021-12-06 21:50:59,168 INFO L226 Difference]: Without dead ends: 1013 [2021-12-06 21:50:59,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:50:59,170 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 1116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:50:59,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1116 Valid, 712 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:50:59,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-12-06 21:50:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 959. [2021-12-06 21:50:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 855 states have (on average 1.3789473684210527) internal successors, (1179), 866 states have internal predecessors, (1179), 65 states have call successors, (65), 33 states have call predecessors, (65), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-06 21:50:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1328 transitions. [2021-12-06 21:50:59,208 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1328 transitions. Word has length 68 [2021-12-06 21:50:59,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:50:59,209 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 1328 transitions. [2021-12-06 21:50:59,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:50:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1328 transitions. [2021-12-06 21:50:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 21:50:59,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:50:59,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:50:59,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:50:59,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:50:59,413 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:50:59,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:50:59,414 INFO L85 PathProgramCache]: Analyzing trace with hash 263839635, now seen corresponding path program 1 times [2021-12-06 21:50:59,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:50:59,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229212626] [2021-12-06 21:50:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:50:59,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:50:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:59,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:50:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:59,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 21:50:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:59,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 21:50:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:50:59,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:50:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229212626] [2021-12-06 21:50:59,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229212626] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:50:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654090622] [2021-12-06 21:50:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:50:59,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:50:59,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:50:59,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:50:59,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:50:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:50:59,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 21:50:59,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:50:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:50:59,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:50:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 21:50:59,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654090622] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:50:59,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:50:59,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-06 21:50:59,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180983237] [2021-12-06 21:50:59,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:50:59,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 21:50:59,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:50:59,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 21:50:59,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:51:00,000 INFO L87 Difference]: Start difference. First operand 959 states and 1328 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-06 21:51:01,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:01,169 INFO L93 Difference]: Finished difference Result 2659 states and 3548 transitions. [2021-12-06 21:51:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 21:51:01,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-06 21:51:01,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:01,182 INFO L225 Difference]: With dead ends: 2659 [2021-12-06 21:51:01,183 INFO L226 Difference]: Without dead ends: 2115 [2021-12-06 21:51:01,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 21:51:01,186 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 1182 mSDsluCounter, 3282 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 4028 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:01,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1213 Valid, 4028 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 21:51:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-12-06 21:51:01,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1348. [2021-12-06 21:51:01,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1205 states have (on average 1.3385892116182572) internal successors, (1613), 1224 states have internal predecessors, (1613), 85 states have call successors, (85), 47 states have call predecessors, (85), 56 states have return successors, (118), 77 states have call predecessors, (118), 82 states have call successors, (118) [2021-12-06 21:51:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1816 transitions. [2021-12-06 21:51:01,286 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1816 transitions. Word has length 69 [2021-12-06 21:51:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:01,286 INFO L470 AbstractCegarLoop]: Abstraction has 1348 states and 1816 transitions. [2021-12-06 21:51:01,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-06 21:51:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1816 transitions. [2021-12-06 21:51:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 21:51:01,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:01,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 21:51:01,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:51:01,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 21:51:01,491 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1486258056, now seen corresponding path program 1 times [2021-12-06 21:51:01,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:01,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362777612] [2021-12-06 21:51:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:01,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:01,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:51:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:01,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 21:51:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:01,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-06 21:51:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:01,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 21:51:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 21:51:01,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:01,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362777612] [2021-12-06 21:51:01,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362777612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:51:01,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975135710] [2021-12-06 21:51:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:01,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:51:01,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:51:01,566 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:51:01,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:51:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:01,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:51:01,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:51:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 21:51:01,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:51:01,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975135710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:01,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:51:01,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-06 21:51:01,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419329643] [2021-12-06 21:51:01,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:01,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:51:01,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:01,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:51:01,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:01,728 INFO L87 Difference]: Start difference. First operand 1348 states and 1816 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 21:51:01,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:01,790 INFO L93 Difference]: Finished difference Result 2071 states and 2754 transitions. [2021-12-06 21:51:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:51:01,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-06 21:51:01,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:01,798 INFO L225 Difference]: With dead ends: 2071 [2021-12-06 21:51:01,798 INFO L226 Difference]: Without dead ends: 1226 [2021-12-06 21:51:01,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:01,800 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 578 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:01,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 717 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:51:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-12-06 21:51:01,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1211. [2021-12-06 21:51:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1084 states have (on average 1.3422509225092252) internal successors, (1455), 1102 states have internal predecessors, (1455), 77 states have call successors, (77), 41 states have call predecessors, (77), 48 states have return successors, (104), 68 states have call predecessors, (104), 74 states have call successors, (104) [2021-12-06 21:51:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1636 transitions. [2021-12-06 21:51:01,848 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1636 transitions. Word has length 88 [2021-12-06 21:51:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:01,848 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 1636 transitions. [2021-12-06 21:51:01,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 21:51:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1636 transitions. [2021-12-06 21:51:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 21:51:01,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:01,851 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:01,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:51:02,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:51:02,053 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:02,054 INFO L85 PathProgramCache]: Analyzing trace with hash 125293381, now seen corresponding path program 1 times [2021-12-06 21:51:02,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:02,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725080559] [2021-12-06 21:51:02,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:02,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 21:51:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 21:51:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 21:51:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 21:51:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 21:51:02,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:02,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725080559] [2021-12-06 21:51:02,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725080559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:51:02,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196866775] [2021-12-06 21:51:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:02,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:51:02,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:51:02,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:51:02,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:51:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:51:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:51:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 21:51:02,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:51:02,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196866775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:02,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:51:02,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-06 21:51:02,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374522813] [2021-12-06 21:51:02,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:02,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:51:02,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:51:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:02,410 INFO L87 Difference]: Start difference. First operand 1211 states and 1636 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 21:51:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:02,440 INFO L93 Difference]: Finished difference Result 1480 states and 1977 transitions. [2021-12-06 21:51:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:51:02,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-06 21:51:02,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:02,443 INFO L225 Difference]: With dead ends: 1480 [2021-12-06 21:51:02,443 INFO L226 Difference]: Without dead ends: 335 [2021-12-06 21:51:02,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:02,446 INFO L933 BasicCegarLoop]: 659 mSDtfsCounter, 59 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:02,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1252 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:51:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-12-06 21:51:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2021-12-06 21:51:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 302 states have (on average 1.576158940397351) internal successors, (476), 304 states have internal predecessors, (476), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 21:51:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 526 transitions. [2021-12-06 21:51:02,463 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 526 transitions. Word has length 103 [2021-12-06 21:51:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:02,463 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 526 transitions. [2021-12-06 21:51:02,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 21:51:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 526 transitions. [2021-12-06 21:51:02,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:02,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:02,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:02,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:51:02,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a1e23c5-f994-4c7e-87c6-6cb9a56c16b4/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 21:51:02,666 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:02,667 INFO L85 PathProgramCache]: Analyzing trace with hash 638824151, now seen corresponding path program 1 times [2021-12-06 21:51:02,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:02,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818501762] [2021-12-06 21:51:02,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:02,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:02,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:02,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818501762] [2021-12-06 21:51:02,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818501762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:02,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:02,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:51:02,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737715845] [2021-12-06 21:51:02,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:02,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:51:02,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:51:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:51:02,771 INFO L87 Difference]: Start difference. First operand 335 states and 526 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:03,687 INFO L93 Difference]: Finished difference Result 782 states and 1248 transitions. [2021-12-06 21:51:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:51:03,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:03,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:03,691 INFO L225 Difference]: With dead ends: 782 [2021-12-06 21:51:03,691 INFO L226 Difference]: Without dead ends: 455 [2021-12-06 21:51:03,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:51:03,693 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 893 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:03,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [915 Valid, 953 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 21:51:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-06 21:51:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 335. [2021-12-06 21:51:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 302 states have (on average 1.5728476821192052) internal successors, (475), 304 states have internal predecessors, (475), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 21:51:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 525 transitions. [2021-12-06 21:51:03,719 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 525 transitions. Word has length 157 [2021-12-06 21:51:03,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:03,720 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 525 transitions. [2021-12-06 21:51:03,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 525 transitions. [2021-12-06 21:51:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:03,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:03,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:03,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 21:51:03,723 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash 903471641, now seen corresponding path program 1 times [2021-12-06 21:51:03,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:03,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798519511] [2021-12-06 21:51:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:03,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:03,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:03,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:03,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:03,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:03,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:03,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:03,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798519511] [2021-12-06 21:51:03,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798519511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:03,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:03,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:51:03,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160928927] [2021-12-06 21:51:03,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:03,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:51:03,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:03,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:51:03,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:51:03,825 INFO L87 Difference]: Start difference. First operand 335 states and 525 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:04,596 INFO L93 Difference]: Finished difference Result 774 states and 1231 transitions. [2021-12-06 21:51:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:51:04,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:04,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:04,598 INFO L225 Difference]: With dead ends: 774 [2021-12-06 21:51:04,598 INFO L226 Difference]: Without dead ends: 455 [2021-12-06 21:51:04,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:51:04,599 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 884 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:04,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 951 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 21:51:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-06 21:51:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 335. [2021-12-06 21:51:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 302 states have (on average 1.5695364238410596) internal successors, (474), 304 states have internal predecessors, (474), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 21:51:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 524 transitions. [2021-12-06 21:51:04,617 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 524 transitions. Word has length 157 [2021-12-06 21:51:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:04,617 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 524 transitions. [2021-12-06 21:51:04,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:04,617 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 524 transitions. [2021-12-06 21:51:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:04,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:04,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:04,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 21:51:04,619 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:04,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:04,619 INFO L85 PathProgramCache]: Analyzing trace with hash 492861275, now seen corresponding path program 1 times [2021-12-06 21:51:04,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:04,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37720467] [2021-12-06 21:51:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:04,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:04,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:04,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:04,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:04,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:04,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:04,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:04,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37720467] [2021-12-06 21:51:04,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37720467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:04,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:04,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:51:04,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275385141] [2021-12-06 21:51:04,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:04,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:51:04,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:04,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:51:04,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:51:04,710 INFO L87 Difference]: Start difference. First operand 335 states and 524 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:06,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:06,371 INFO L93 Difference]: Finished difference Result 1221 states and 1955 transitions. [2021-12-06 21:51:06,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:51:06,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:06,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:06,375 INFO L225 Difference]: With dead ends: 1221 [2021-12-06 21:51:06,375 INFO L226 Difference]: Without dead ends: 905 [2021-12-06 21:51:06,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:51:06,376 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 1338 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:06,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 1533 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 21:51:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-12-06 21:51:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 664. [2021-12-06 21:51:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 605 states have (on average 1.5834710743801652) internal successors, (958), 608 states have internal predecessors, (958), 45 states have call successors, (45), 13 states have call predecessors, (45), 13 states have return successors, (46), 43 states have call predecessors, (46), 43 states have call successors, (46) [2021-12-06 21:51:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1049 transitions. [2021-12-06 21:51:06,415 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1049 transitions. Word has length 157 [2021-12-06 21:51:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:06,415 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1049 transitions. [2021-12-06 21:51:06,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1049 transitions. [2021-12-06 21:51:06,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:06,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:06,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:06,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 21:51:06,417 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:06,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:06,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1158896471, now seen corresponding path program 1 times [2021-12-06 21:51:06,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:06,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660952878] [2021-12-06 21:51:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:06,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:06,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:06,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:06,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:06,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:06,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:06,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:06,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660952878] [2021-12-06 21:51:06,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660952878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:06,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:06,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:51:06,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215590931] [2021-12-06 21:51:06,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:06,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:51:06,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:06,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:51:06,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:06,519 INFO L87 Difference]: Start difference. First operand 664 states and 1049 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:08,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:08,479 INFO L93 Difference]: Finished difference Result 2014 states and 3231 transitions. [2021-12-06 21:51:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:51:08,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:08,485 INFO L225 Difference]: With dead ends: 2014 [2021-12-06 21:51:08,485 INFO L226 Difference]: Without dead ends: 1369 [2021-12-06 21:51:08,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:51:08,487 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 1363 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:08,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1380 Valid, 2646 Invalid, 2700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 21:51:08,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-12-06 21:51:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 970. [2021-12-06 21:51:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 885 states have (on average 1.577401129943503) internal successors, (1396), 889 states have internal predecessors, (1396), 64 states have call successors, (64), 19 states have call predecessors, (64), 20 states have return successors, (67), 63 states have call predecessors, (67), 62 states have call successors, (67) [2021-12-06 21:51:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1527 transitions. [2021-12-06 21:51:08,554 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1527 transitions. Word has length 157 [2021-12-06 21:51:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:08,555 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 1527 transitions. [2021-12-06 21:51:08,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1527 transitions. [2021-12-06 21:51:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:08,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:08,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:08,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 21:51:08,557 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:08,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117223, now seen corresponding path program 1 times [2021-12-06 21:51:08,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:08,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924543121] [2021-12-06 21:51:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:08,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:08,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:08,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:08,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:08,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:08,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:08,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:08,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924543121] [2021-12-06 21:51:08,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924543121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:08,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:08,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:51:08,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392280120] [2021-12-06 21:51:08,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:08,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:51:08,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:08,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:51:08,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:08,667 INFO L87 Difference]: Start difference. First operand 970 states and 1527 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:10,667 INFO L93 Difference]: Finished difference Result 3182 states and 5097 transitions. [2021-12-06 21:51:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:51:10,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:10,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:10,676 INFO L225 Difference]: With dead ends: 3182 [2021-12-06 21:51:10,676 INFO L226 Difference]: Without dead ends: 2231 [2021-12-06 21:51:10,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:51:10,680 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 1356 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 2617 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 2632 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:10,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 2632 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2617 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 21:51:10,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-12-06 21:51:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1586. [2021-12-06 21:51:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1449 states have (on average 1.572808833678399) internal successors, (2279), 1455 states have internal predecessors, (2279), 102 states have call successors, (102), 31 states have call predecessors, (102), 34 states have return successors, (113), 103 states have call predecessors, (113), 100 states have call successors, (113) [2021-12-06 21:51:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 2494 transitions. [2021-12-06 21:51:10,777 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 2494 transitions. Word has length 157 [2021-12-06 21:51:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:10,777 INFO L470 AbstractCegarLoop]: Abstraction has 1586 states and 2494 transitions. [2021-12-06 21:51:10,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 2494 transitions. [2021-12-06 21:51:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:10,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:10,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:10,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 21:51:10,781 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:10,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:10,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1373650725, now seen corresponding path program 1 times [2021-12-06 21:51:10,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:10,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418397337] [2021-12-06 21:51:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:10,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:10,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:10,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:10,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:10,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:10,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:10,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:10,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418397337] [2021-12-06 21:51:10,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418397337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:10,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:10,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:51:10,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959026411] [2021-12-06 21:51:10,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:10,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:51:10,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:10,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:51:10,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:10,885 INFO L87 Difference]: Start difference. First operand 1586 states and 2494 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:12,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:12,941 INFO L93 Difference]: Finished difference Result 5436 states and 8676 transitions. [2021-12-06 21:51:12,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:51:12,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:12,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:12,957 INFO L225 Difference]: With dead ends: 5436 [2021-12-06 21:51:12,957 INFO L226 Difference]: Without dead ends: 3869 [2021-12-06 21:51:12,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:51:12,961 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 1355 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 2609 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 2627 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:12,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1372 Valid, 2627 Invalid, 2691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2609 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 21:51:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3869 states. [2021-12-06 21:51:13,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3869 to 2819. [2021-12-06 21:51:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2578 states have (on average 1.569045771916214) internal successors, (4045), 2588 states have internal predecessors, (4045), 178 states have call successors, (178), 55 states have call predecessors, (178), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2021-12-06 21:51:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4434 transitions. [2021-12-06 21:51:13,136 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4434 transitions. Word has length 157 [2021-12-06 21:51:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:13,136 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 4434 transitions. [2021-12-06 21:51:13,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4434 transitions. [2021-12-06 21:51:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:13,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:13,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:13,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 21:51:13,139 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1084831335, now seen corresponding path program 1 times [2021-12-06 21:51:13,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:13,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218666243] [2021-12-06 21:51:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:13,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:13,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:13,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:13,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:13,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:13,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:13,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:13,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218666243] [2021-12-06 21:51:13,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218666243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:13,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:13,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:51:13,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13441693] [2021-12-06 21:51:13,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:13,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:51:13,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:51:13,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:13,234 INFO L87 Difference]: Start difference. First operand 2819 states and 4434 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:15,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:15,588 INFO L93 Difference]: Finished difference Result 9943 states and 15850 transitions. [2021-12-06 21:51:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:51:15,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:15,615 INFO L225 Difference]: With dead ends: 9943 [2021-12-06 21:51:15,615 INFO L226 Difference]: Without dead ends: 7143 [2021-12-06 21:51:15,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:51:15,623 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 1354 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1371 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:15,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1371 Valid, 2622 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2601 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 21:51:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7143 states. [2021-12-06 21:51:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7143 to 5292. [2021-12-06 21:51:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5292 states, 4843 states have (on average 1.5665909560189966) internal successors, (7587), 4861 states have internal predecessors, (7587), 330 states have call successors, (330), 103 states have call predecessors, (330), 118 states have return successors, (425), 343 states have call predecessors, (425), 328 states have call successors, (425) [2021-12-06 21:51:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5292 states to 5292 states and 8342 transitions. [2021-12-06 21:51:15,964 INFO L78 Accepts]: Start accepts. Automaton has 5292 states and 8342 transitions. Word has length 157 [2021-12-06 21:51:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:15,964 INFO L470 AbstractCegarLoop]: Abstraction has 5292 states and 8342 transitions. [2021-12-06 21:51:15,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 5292 states and 8342 transitions. [2021-12-06 21:51:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:15,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:15,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:15,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 21:51:15,969 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1629703909, now seen corresponding path program 1 times [2021-12-06 21:51:15,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:15,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081900700] [2021-12-06 21:51:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:15,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:15,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:16,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:16,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:16,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:16,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:16,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:16,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081900700] [2021-12-06 21:51:16,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081900700] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:16,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:16,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:51:16,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478940663] [2021-12-06 21:51:16,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:16,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:51:16,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:16,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:51:16,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:16,067 INFO L87 Difference]: Start difference. First operand 5292 states and 8342 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:17,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:17,345 INFO L93 Difference]: Finished difference Result 12498 states and 19989 transitions. [2021-12-06 21:51:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:51:17,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:17,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:17,368 INFO L225 Difference]: With dead ends: 12498 [2021-12-06 21:51:17,368 INFO L226 Difference]: Without dead ends: 7225 [2021-12-06 21:51:17,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:51:17,380 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 1114 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:17,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 1215 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 21:51:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7225 states. [2021-12-06 21:51:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7225 to 5292. [2021-12-06 21:51:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5292 states, 4843 states have (on average 1.563080735081561) internal successors, (7570), 4861 states have internal predecessors, (7570), 330 states have call successors, (330), 103 states have call predecessors, (330), 118 states have return successors, (425), 343 states have call predecessors, (425), 328 states have call successors, (425) [2021-12-06 21:51:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5292 states to 5292 states and 8325 transitions. [2021-12-06 21:51:17,708 INFO L78 Accepts]: Start accepts. Automaton has 5292 states and 8325 transitions. Word has length 157 [2021-12-06 21:51:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:17,708 INFO L470 AbstractCegarLoop]: Abstraction has 5292 states and 8325 transitions. [2021-12-06 21:51:17,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 5292 states and 8325 transitions. [2021-12-06 21:51:17,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:17,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:17,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:17,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 21:51:17,712 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:17,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:17,712 INFO L85 PathProgramCache]: Analyzing trace with hash -954543783, now seen corresponding path program 1 times [2021-12-06 21:51:17,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:17,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295107844] [2021-12-06 21:51:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:17,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:17,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:17,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:17,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:17,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:17,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:17,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:17,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295107844] [2021-12-06 21:51:17,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295107844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:17,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:17,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:51:17,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010251331] [2021-12-06 21:51:17,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:17,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:51:17,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:17,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:51:17,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:17,806 INFO L87 Difference]: Start difference. First operand 5292 states and 8325 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:20,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:20,601 INFO L93 Difference]: Finished difference Result 18940 states and 30140 transitions. [2021-12-06 21:51:20,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:51:20,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:20,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:20,634 INFO L225 Difference]: With dead ends: 18940 [2021-12-06 21:51:20,634 INFO L226 Difference]: Without dead ends: 13667 [2021-12-06 21:51:20,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:51:20,648 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 1346 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 2574 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 2611 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:20,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1363 Valid, 2611 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2574 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 21:51:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13667 states. [2021-12-06 21:51:21,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13667 to 10270. [2021-12-06 21:51:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10270 states, 9405 states have (on average 1.5606592238171186) internal successors, (14678), 9439 states have internal predecessors, (14678), 634 states have call successors, (634), 199 states have call predecessors, (634), 230 states have return successors, (907), 663 states have call predecessors, (907), 632 states have call successors, (907) [2021-12-06 21:51:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10270 states to 10270 states and 16219 transitions. [2021-12-06 21:51:21,320 INFO L78 Accepts]: Start accepts. Automaton has 10270 states and 16219 transitions. Word has length 157 [2021-12-06 21:51:21,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:21,320 INFO L470 AbstractCegarLoop]: Abstraction has 10270 states and 16219 transitions. [2021-12-06 21:51:21,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 10270 states and 16219 transitions. [2021-12-06 21:51:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:21,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:21,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:21,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 21:51:21,325 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:21,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1902595749, now seen corresponding path program 1 times [2021-12-06 21:51:21,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:21,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500853569] [2021-12-06 21:51:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:21,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:21,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:21,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:21,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:21,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:21,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:21,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:21,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500853569] [2021-12-06 21:51:21,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500853569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:21,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:21,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:51:21,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376016966] [2021-12-06 21:51:21,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:21,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:51:21,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:21,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:51:21,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:21,415 INFO L87 Difference]: Start difference. First operand 10270 states and 16219 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:25,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:25,303 INFO L93 Difference]: Finished difference Result 36972 states and 59060 transitions. [2021-12-06 21:51:25,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:51:25,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:25,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:25,365 INFO L225 Difference]: With dead ends: 36972 [2021-12-06 21:51:25,366 INFO L226 Difference]: Without dead ends: 26721 [2021-12-06 21:51:25,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:51:25,392 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 1345 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 2648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:25,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1362 Valid, 2606 Invalid, 2648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2566 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 21:51:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26721 states. [2021-12-06 21:51:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26721 to 20255. [2021-12-06 21:51:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20255 states, 18558 states have (on average 1.5592197435068433) internal successors, (28936), 18624 states have internal predecessors, (28936), 1242 states have call successors, (1242), 391 states have call predecessors, (1242), 454 states have return successors, (2033), 1303 states have call predecessors, (2033), 1240 states have call successors, (2033) [2021-12-06 21:51:26,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20255 states to 20255 states and 32211 transitions. [2021-12-06 21:51:26,702 INFO L78 Accepts]: Start accepts. Automaton has 20255 states and 32211 transitions. Word has length 157 [2021-12-06 21:51:26,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:26,702 INFO L470 AbstractCegarLoop]: Abstraction has 20255 states and 32211 transitions. [2021-12-06 21:51:26,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:26,702 INFO L276 IsEmpty]: Start isEmpty. Operand 20255 states and 32211 transitions. [2021-12-06 21:51:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:26,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:26,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:26,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 21:51:26,710 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:26,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1807599897, now seen corresponding path program 1 times [2021-12-06 21:51:26,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:26,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186175233] [2021-12-06 21:51:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:26,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:26,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:26,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:26,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:26,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:26,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:26,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:26,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186175233] [2021-12-06 21:51:26,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186175233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:26,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:26,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:51:26,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298866026] [2021-12-06 21:51:26,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:26,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:51:26,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:26,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:51:26,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:26,799 INFO L87 Difference]: Start difference. First operand 20255 states and 32211 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:29,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:29,546 INFO L93 Difference]: Finished difference Result 47330 states and 76442 transitions. [2021-12-06 21:51:29,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:51:29,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:29,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:29,606 INFO L225 Difference]: With dead ends: 47330 [2021-12-06 21:51:29,606 INFO L226 Difference]: Without dead ends: 27094 [2021-12-06 21:51:29,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:51:29,638 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 1117 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:29,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 1203 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 21:51:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27094 states. [2021-12-06 21:51:31,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27094 to 20255. [2021-12-06 21:51:31,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20255 states, 18558 states have (on average 1.5557172109063477) internal successors, (28871), 18624 states have internal predecessors, (28871), 1242 states have call successors, (1242), 391 states have call predecessors, (1242), 454 states have return successors, (2033), 1303 states have call predecessors, (2033), 1240 states have call successors, (2033) [2021-12-06 21:51:31,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20255 states to 20255 states and 32146 transitions. [2021-12-06 21:51:31,102 INFO L78 Accepts]: Start accepts. Automaton has 20255 states and 32146 transitions. Word has length 157 [2021-12-06 21:51:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:31,102 INFO L470 AbstractCegarLoop]: Abstraction has 20255 states and 32146 transitions. [2021-12-06 21:51:31,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 20255 states and 32146 transitions. [2021-12-06 21:51:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:31,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:31,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:31,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 21:51:31,110 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:31,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1373094299, now seen corresponding path program 1 times [2021-12-06 21:51:31,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:31,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859773530] [2021-12-06 21:51:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:31,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:31,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:31,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:31,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:31,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:31,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:31,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:31,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859773530] [2021-12-06 21:51:31,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859773530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:31,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:31,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:51:31,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068322938] [2021-12-06 21:51:31,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:31,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:51:31,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:31,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:51:31,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:31,210 INFO L87 Difference]: Start difference. First operand 20255 states and 32146 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:38,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:38,481 INFO L93 Difference]: Finished difference Result 82439 states and 131504 transitions. [2021-12-06 21:51:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:51:38,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:38,634 INFO L225 Difference]: With dead ends: 82439 [2021-12-06 21:51:38,634 INFO L226 Difference]: Without dead ends: 62203 [2021-12-06 21:51:38,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:51:38,685 INFO L933 BasicCegarLoop]: 830 mSDtfsCounter, 1744 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:38,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1772 Valid, 2579 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 21:51:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62203 states. [2021-12-06 21:51:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62203 to 40226. [2021-12-06 21:51:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40226 states, 36929 states have (on average 1.5566357063554388) internal successors, (57485), 37059 states have internal predecessors, (57485), 2394 states have call successors, (2394), 775 states have call predecessors, (2394), 902 states have return successors, (4707), 2519 states have call predecessors, (4707), 2392 states have call successors, (4707) [2021-12-06 21:51:41,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40226 states to 40226 states and 64586 transitions. [2021-12-06 21:51:41,759 INFO L78 Accepts]: Start accepts. Automaton has 40226 states and 64586 transitions. Word has length 157 [2021-12-06 21:51:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:51:41,759 INFO L470 AbstractCegarLoop]: Abstraction has 40226 states and 64586 transitions. [2021-12-06 21:51:41,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 40226 states and 64586 transitions. [2021-12-06 21:51:41,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:51:41,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:51:41,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:51:41,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 21:51:41,773 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:51:41,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:51:41,774 INFO L85 PathProgramCache]: Analyzing trace with hash 666497693, now seen corresponding path program 1 times [2021-12-06 21:51:41,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:51:41,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423862862] [2021-12-06 21:51:41,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:51:41,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:51:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:41,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:51:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:41,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:51:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:41,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:51:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:41,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:51:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:41,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:51:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:51:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:51:41,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:51:41,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423862862] [2021-12-06 21:51:41,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423862862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:51:41,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:51:41,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:51:41,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495014288] [2021-12-06 21:51:41,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:51:41,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:51:41,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:51:41,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:51:41,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:51:41,867 INFO L87 Difference]: Start difference. First operand 40226 states and 64586 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:51:55,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:51:55,236 INFO L93 Difference]: Finished difference Result 161992 states and 261242 transitions. [2021-12-06 21:51:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:51:55,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:51:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:51:55,591 INFO L225 Difference]: With dead ends: 161992 [2021-12-06 21:51:55,591 INFO L226 Difference]: Without dead ends: 121785 [2021-12-06 21:51:55,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:51:55,706 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 1427 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 3056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:51:55,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1443 Valid, 2726 Invalid, 3056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 21:51:55,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121785 states. [2021-12-06 21:52:01,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121785 to 78819. [2021-12-06 21:52:01,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78819 states, 72386 states have (on average 1.5536567844610836) internal successors, (112463), 72644 states have internal predecessors, (112463), 4634 states have call successors, (4634), 1543 states have call predecessors, (4634), 1798 states have return successors, (11449), 4887 states have call predecessors, (11449), 4632 states have call successors, (11449) [2021-12-06 21:52:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78819 states to 78819 states and 128546 transitions. [2021-12-06 21:52:02,061 INFO L78 Accepts]: Start accepts. Automaton has 78819 states and 128546 transitions. Word has length 157 [2021-12-06 21:52:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:52:02,061 INFO L470 AbstractCegarLoop]: Abstraction has 78819 states and 128546 transitions. [2021-12-06 21:52:02,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:52:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 78819 states and 128546 transitions. [2021-12-06 21:52:02,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:52:02,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:52:02,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:52:02,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 21:52:02,094 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:52:02,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:52:02,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1613535579, now seen corresponding path program 1 times [2021-12-06 21:52:02,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:52:02,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632776745] [2021-12-06 21:52:02,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:52:02,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:52:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:52:02,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:52:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:52:02,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:52:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:52:02,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:52:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:52:02,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:52:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:52:02,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:52:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:52:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:52:02,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:52:02,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632776745] [2021-12-06 21:52:02,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632776745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:52:02,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:52:02,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:52:02,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717957023] [2021-12-06 21:52:02,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:52:02,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:52:02,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:52:02,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:52:02,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:52:02,175 INFO L87 Difference]: Start difference. First operand 78819 states and 128546 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:52:26,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:52:26,578 INFO L93 Difference]: Finished difference Result 314887 states and 515728 transitions. [2021-12-06 21:52:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:52:26,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:52:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:52:27,395 INFO L225 Difference]: With dead ends: 314887 [2021-12-06 21:52:27,395 INFO L226 Difference]: Without dead ends: 236087 [2021-12-06 21:52:27,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:52:27,753 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 1664 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1692 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:52:27,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1692 Valid, 2569 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 21:52:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236087 states. [2021-12-06 21:52:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236087 to 157156. [2021-12-06 21:52:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157156 states, 144579 states have (on average 1.5551981961419017) internal successors, (224849), 145093 states have internal predecessors, (224849), 8986 states have call successors, (8986), 3079 states have call predecessors, (8986), 3590 states have return successors, (29179), 9495 states have call predecessors, (29179), 8984 states have call successors, (29179) [2021-12-06 21:52:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157156 states to 157156 states and 263014 transitions. [2021-12-06 21:52:40,964 INFO L78 Accepts]: Start accepts. Automaton has 157156 states and 263014 transitions. Word has length 157 [2021-12-06 21:52:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:52:40,965 INFO L470 AbstractCegarLoop]: Abstraction has 157156 states and 263014 transitions. [2021-12-06 21:52:40,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:52:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 157156 states and 263014 transitions. [2021-12-06 21:52:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:52:41,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:52:41,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:52:41,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 21:52:41,013 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:52:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:52:41,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1819598115, now seen corresponding path program 1 times [2021-12-06 21:52:41,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:52:41,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178322263] [2021-12-06 21:52:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:52:41,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:52:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:52:41,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:52:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:52:41,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:52:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:52:41,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:52:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:52:41,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:52:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:52:41,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:52:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:52:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:52:41,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:52:41,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178322263] [2021-12-06 21:52:41,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178322263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:52:41,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:52:41,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:52:41,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005607395] [2021-12-06 21:52:41,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:52:41,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:52:41,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:52:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:52:41,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:52:41,096 INFO L87 Difference]: Start difference. First operand 157156 states and 263014 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:53:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:53:30,384 INFO L93 Difference]: Finished difference Result 619526 states and 1041302 transitions. [2021-12-06 21:53:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:53:30,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:53:30,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:53:32,174 INFO L225 Difference]: With dead ends: 619526 [2021-12-06 21:53:32,175 INFO L226 Difference]: Without dead ends: 462389 [2021-12-06 21:53:32,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:53:32,698 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 1406 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 2884 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1422 SdHoareTripleChecker+Valid, 2688 SdHoareTripleChecker+Invalid, 2971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:53:32,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1422 Valid, 2688 Invalid, 2971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2884 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 21:53:32,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462389 states. [2021-12-06 21:53:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462389 to 313573. [2021-12-06 21:53:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313573 states, 288964 states have (on average 1.556854833128002) internal successors, (449875), 289990 states have internal predecessors, (449875), 17434 states have call successors, (17434), 6151 states have call predecessors, (17434), 7174 states have return successors, (77505), 18455 states have call predecessors, (77505), 17432 states have call successors, (77505) [2021-12-06 21:53:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313573 states to 313573 states and 544814 transitions. [2021-12-06 21:53:59,948 INFO L78 Accepts]: Start accepts. Automaton has 313573 states and 544814 transitions. Word has length 157 [2021-12-06 21:53:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:53:59,949 INFO L470 AbstractCegarLoop]: Abstraction has 313573 states and 544814 transitions. [2021-12-06 21:53:59,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:53:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 313573 states and 544814 transitions. [2021-12-06 21:54:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:54:00,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:54:00,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:54:00,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 21:54:00,049 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:54:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:54:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash 424960283, now seen corresponding path program 1 times [2021-12-06 21:54:00,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:54:00,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144299935] [2021-12-06 21:54:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:54:00,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:54:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:54:00,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:54:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:54:00,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:54:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:54:00,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:54:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:54:00,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:54:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:54:00,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:54:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:54:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:54:00,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:54:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144299935] [2021-12-06 21:54:00,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144299935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:54:00,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:54:00,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:54:00,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616836502] [2021-12-06 21:54:00,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:54:00,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:54:00,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:54:00,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:54:00,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:54:00,136 INFO L87 Difference]: Start difference. First operand 313573 states and 544814 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:54:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:54:41,355 INFO L93 Difference]: Finished difference Result 721634 states and 1298631 transitions. [2021-12-06 21:54:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:54:41,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:54:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:54:43,351 INFO L225 Difference]: With dead ends: 721634 [2021-12-06 21:54:43,351 INFO L226 Difference]: Without dead ends: 408080 [2021-12-06 21:54:44,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:54:44,366 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 972 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:54:44,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [990 Valid, 1360 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 21:54:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408080 states. [2021-12-06 21:55:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408080 to 313573. [2021-12-06 21:55:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313573 states, 288964 states have (on average 1.5533076784651376) internal successors, (448850), 289990 states have internal predecessors, (448850), 17434 states have call successors, (17434), 6151 states have call predecessors, (17434), 7174 states have return successors, (77505), 18455 states have call predecessors, (77505), 17432 states have call successors, (77505) [2021-12-06 21:55:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313573 states to 313573 states and 543789 transitions. [2021-12-06 21:55:14,204 INFO L78 Accepts]: Start accepts. Automaton has 313573 states and 543789 transitions. Word has length 157 [2021-12-06 21:55:14,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:55:14,204 INFO L470 AbstractCegarLoop]: Abstraction has 313573 states and 543789 transitions. [2021-12-06 21:55:14,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:55:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 313573 states and 543789 transitions. [2021-12-06 21:55:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:55:14,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:55:14,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:55:14,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 21:55:14,299 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:55:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:55:14,299 INFO L85 PathProgramCache]: Analyzing trace with hash 913007389, now seen corresponding path program 1 times [2021-12-06 21:55:14,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:55:14,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144915160] [2021-12-06 21:55:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:55:14,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:55:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:55:14,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:55:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:55:14,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:55:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:55:14,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:55:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:55:14,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:55:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:55:14,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:55:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:55:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:55:14,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:55:14,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144915160] [2021-12-06 21:55:14,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144915160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:55:14,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:55:14,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:55:14,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553323461] [2021-12-06 21:55:14,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:55:14,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:55:14,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:55:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:55:14,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:55:14,383 INFO L87 Difference]: Start difference. First operand 313573 states and 543789 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:56:54,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:56:54,826 INFO L93 Difference]: Finished difference Result 1203971 states and 2102180 transitions. [2021-12-06 21:56:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:56:54,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 21:56:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:56:58,875 INFO L225 Difference]: With dead ends: 1203971 [2021-12-06 21:56:58,875 INFO L226 Difference]: Without dead ends: 890417 [2021-12-06 21:57:00,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:57:00,539 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 1538 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1566 SdHoareTripleChecker+Valid, 2553 SdHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:57:00,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1566 Valid, 2553 Invalid, 2558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 21:57:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890417 states. [2021-12-06 21:57:58,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890417 to 626919. [2021-12-06 21:57:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626919 states, 578758 states have (on average 1.5540415856022725) internal successors, (899414), 580808 states have internal predecessors, (899414), 33818 states have call successors, (33818), 12295 states have call predecessors, (33818), 14342 states have return successors, (213011), 35863 states have call predecessors, (213011), 33816 states have call successors, (213011) [2021-12-06 21:58:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626919 states to 626919 states and 1146243 transitions. [2021-12-06 21:58:02,705 INFO L78 Accepts]: Start accepts. Automaton has 626919 states and 1146243 transitions. Word has length 157 [2021-12-06 21:58:02,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:58:02,705 INFO L470 AbstractCegarLoop]: Abstraction has 626919 states and 1146243 transitions. [2021-12-06 21:58:02,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 21:58:02,706 INFO L276 IsEmpty]: Start isEmpty. Operand 626919 states and 1146243 transitions. [2021-12-06 21:58:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-06 21:58:02,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:58:02,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:58:02,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 21:58:02,914 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:58:02,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:58:02,915 INFO L85 PathProgramCache]: Analyzing trace with hash -179627813, now seen corresponding path program 1 times [2021-12-06 21:58:02,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:58:02,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705153229] [2021-12-06 21:58:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:58:02,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:58:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:58:02,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:58:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:58:02,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 21:58:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:58:02,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 21:58:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:58:03,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-06 21:58:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:58:03,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 21:58:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:58:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:58:03,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:58:03,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705153229] [2021-12-06 21:58:03,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705153229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:58:03,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:58:03,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 21:58:03,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546580973] [2021-12-06 21:58:03,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:58:03,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:58:03,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:58:03,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:58:03,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:58:03,009 INFO L87 Difference]: Start difference. First operand 626919 states and 1146243 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:01:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:01:23,996 INFO L93 Difference]: Finished difference Result 2370307 states and 4379884 transitions. [2021-12-06 22:01:23,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:01:23,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2021-12-06 22:01:23,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:01:33,641 INFO L225 Difference]: With dead ends: 2370307 [2021-12-06 22:01:33,641 INFO L226 Difference]: Without dead ends: 1743407 [2021-12-06 22:01:37,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:01:37,380 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 1370 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 2741 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:01:37,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1386 Valid, 2622 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2741 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 22:01:38,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743407 states.