./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label43+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=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dc558ff06d1f59013c6fd3228f6de1555b4f43a79036afca93164a3b9d9173fd --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:41:37,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:41:37,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:41:37,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:41:37,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:41:37,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:41:37,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:41:37,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:41:37,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:41:37,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:41:37,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:41:37,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:41:37,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:41:37,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:41:37,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:41:37,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:41:37,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:41:37,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:41:37,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:41:37,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:41:37,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:41:37,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:41:37,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:41:37,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:41:37,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:41:37,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:41:37,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:41:37,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:41:37,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:41:37,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:41:37,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:41:37,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:41:37,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:41:37,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:41:37,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:41:37,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:41:37,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:41:37,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:41:37,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:41:37,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:41:37,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:41:37,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:41:37,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:41:37,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:41:37,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:41:37,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:41:37,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:41:37,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:41:37,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:41:37,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:41:37,678 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:41:37,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:41:37,679 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:41:37,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:41:37,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:41:37,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:41:37,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:41:37,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:41:37,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:41:37,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:41:37,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:41:37,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:41:37,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:41:37,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:41:37,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:41:37,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:41:37,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:41:37,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:41:37,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:41:37,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:41:37,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:41:37,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:41:37,683 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:41:37,683 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:41:37,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:41:37,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:41:37,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc558ff06d1f59013c6fd3228f6de1555b4f43a79036afca93164a3b9d9173fd [2021-12-14 15:41:38,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:41:38,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:41:38,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:41:38,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:41:38,085 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:41:38,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c [2021-12-14 15:41:38,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/727bdb4c2/8ee4b9e730e44393bde4c6cd3e641203/FLAGd91be1016 [2021-12-14 15:41:38,793 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:41:38,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c [2021-12-14 15:41:38,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/727bdb4c2/8ee4b9e730e44393bde4c6cd3e641203/FLAGd91be1016 [2021-12-14 15:41:39,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/727bdb4c2/8ee4b9e730e44393bde4c6cd3e641203 [2021-12-14 15:41:39,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:41:39,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:41:39,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:41:39,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:41:39,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:41:39,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:41:39" (1/1) ... [2021-12-14 15:41:39,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c2386de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:39, skipping insertion in model container [2021-12-14 15:41:39,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:41:39" (1/1) ... [2021-12-14 15:41:39,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:41:39,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:41:40,499 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c[381679,381692] [2021-12-14 15:41:40,517 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c[383339,383352] [2021-12-14 15:41:40,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:41:40,730 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:41:41,299 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c[381679,381692] [2021-12-14 15:41:41,302 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label43+token_ring.10.cil-1.c[383339,383352] [2021-12-14 15:41:41,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:41:41,387 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:41:41,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:41 WrapperNode [2021-12-14 15:41:41,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:41:41,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:41:41,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:41:41,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:41:41,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:41" (1/1) ... [2021-12-14 15:41:41,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:41" (1/1) ... [2021-12-14 15:41:41,870 INFO L137 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 13088 [2021-12-14 15:41:41,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:41:41,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:41:41,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:41:41,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:41:41,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:41" (1/1) ... [2021-12-14 15:41:41,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:41" (1/1) ... [2021-12-14 15:41:41,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:41" (1/1) ... [2021-12-14 15:41:41,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:41" (1/1) ... [2021-12-14 15:41:42,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:41" (1/1) ... [2021-12-14 15:41:42,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:41" (1/1) ... [2021-12-14 15:41:42,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:41" (1/1) ... [2021-12-14 15:41:42,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:41:42,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:41:42,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:41:42,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:41:42,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:41" (1/1) ... [2021-12-14 15:41:42,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:41:42,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:41:42,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 15:41:42,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 15:41:42,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:41:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-14 15:41:42,408 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-14 15:41:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 15:41:42,409 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 15:41:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-14 15:41:42,410 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-14 15:41:42,410 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-14 15:41:42,410 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-14 15:41:42,410 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-14 15:41:42,410 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-14 15:41:42,410 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-14 15:41:42,410 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-14 15:41:42,410 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-14 15:41:42,411 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-14 15:41:42,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:41:42,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:41:42,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:41:42,546 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:41:42,547 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:41:47,312 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:41:47,333 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:41:47,334 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-12-14 15:41:47,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:41:47 BoogieIcfgContainer [2021-12-14 15:41:47,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:41:47,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:41:47,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:41:47,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:41:47,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:41:39" (1/3) ... [2021-12-14 15:41:47,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17498425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:41:47, skipping insertion in model container [2021-12-14 15:41:47,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:41:41" (2/3) ... [2021-12-14 15:41:47,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17498425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:41:47, skipping insertion in model container [2021-12-14 15:41:47,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:41:47" (3/3) ... [2021-12-14 15:41:47,345 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.10.cil-1.c [2021-12-14 15:41:47,349 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:41:47,349 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 15:41:47,392 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:41:47,396 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 [2021-12-14 15:41:47,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 15:41:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 2523 states, 2487 states have (on average 1.845999195818255) internal successors, (4591), 2492 states have internal predecessors, (4591), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-14 15:41:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:41:47,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:41:47,449 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] [2021-12-14 15:41:47,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:41:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:41:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash -289990772, now seen corresponding path program 1 times [2021-12-14 15:41:47,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:41:47,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929049094] [2021-12-14 15:41:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:41:47,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:41:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:47,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:41:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:47,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:41:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:47,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:41:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:47,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:41:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:47,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:41:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:41:47,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:41:47,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929049094] [2021-12-14 15:41:47,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929049094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:41:47,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:41:47,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:41:47,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934144778] [2021-12-14 15:41:47,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:41:47,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:41:47,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:41:47,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:41:47,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:41:47,749 INFO L87 Difference]: Start difference. First operand has 2523 states, 2487 states have (on average 1.845999195818255) internal successors, (4591), 2492 states have internal predecessors, (4591), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) 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) [2021-12-14 15:41:48,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:41:48,748 INFO L93 Difference]: Finished difference Result 5155 states and 9474 transitions. [2021-12-14 15:41:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:41:48,750 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 [2021-12-14 15:41:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:41:48,768 INFO L225 Difference]: With dead ends: 5155 [2021-12-14 15:41:48,768 INFO L226 Difference]: Without dead ends: 2575 [2021-12-14 15:41:48,775 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 [2021-12-14 15:41:48,778 INFO L933 BasicCegarLoop]: 4601 mSDtfsCounter, 896 mSDsluCounter, 12449 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 17050 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:41:48,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 17050 Invalid, 660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [62 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:41:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-12-14 15:41:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 2455. [2021-12-14 15:41:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 2421 states have (on average 1.8306484923585296) internal successors, (4432), 2424 states have internal predecessors, (4432), 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) [2021-12-14 15:41:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 4482 transitions. [2021-12-14 15:41:48,869 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 4482 transitions. Word has length 157 [2021-12-14 15:41:48,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:41:48,870 INFO L470 AbstractCegarLoop]: Abstraction has 2455 states and 4482 transitions. [2021-12-14 15:41:48,870 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) [2021-12-14 15:41:48,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 4482 transitions. [2021-12-14 15:41:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:41:48,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:41:48,873 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] [2021-12-14 15:41:48,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:41:48,873 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:41:48,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:41:48,874 INFO L85 PathProgramCache]: Analyzing trace with hash -628278322, now seen corresponding path program 1 times [2021-12-14 15:41:48,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:41:48,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082030718] [2021-12-14 15:41:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:41:48,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:41:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:48,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:41:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:49,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:41:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:49,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:41:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:49,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:41:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:49,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:41:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:41:49,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:41:49,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082030718] [2021-12-14 15:41:49,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082030718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:41:49,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:41:49,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:41:49,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100852231] [2021-12-14 15:41:49,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:41:49,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:41:49,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:41:49,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:41:49,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:41:49,103 INFO L87 Difference]: Start difference. First operand 2455 states and 4482 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) [2021-12-14 15:41:50,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:41:50,356 INFO L93 Difference]: Finished difference Result 2913 states and 5228 transitions. [2021-12-14 15:41:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:41:50,357 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 [2021-12-14 15:41:50,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:41:50,367 INFO L225 Difference]: With dead ends: 2913 [2021-12-14 15:41:50,368 INFO L226 Difference]: Without dead ends: 2597 [2021-12-14 15:41:50,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:41:50,373 INFO L933 BasicCegarLoop]: 4529 mSDtfsCounter, 4922 mSDsluCounter, 16673 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4940 SdHoareTripleChecker+Valid, 21202 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:41:50,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4940 Valid, 21202 Invalid, 1389 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [74 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 15:41:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-12-14 15:41:50,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2455. [2021-12-14 15:41:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 2421 states have (on average 1.8302354399008673) internal successors, (4431), 2424 states have internal predecessors, (4431), 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) [2021-12-14 15:41:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 4481 transitions. [2021-12-14 15:41:50,495 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 4481 transitions. Word has length 157 [2021-12-14 15:41:50,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:41:50,496 INFO L470 AbstractCegarLoop]: Abstraction has 2455 states and 4481 transitions. [2021-12-14 15:41:50,497 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) [2021-12-14 15:41:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 4481 transitions. [2021-12-14 15:41:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:41:50,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:41:50,501 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] [2021-12-14 15:41:50,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:41:50,502 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:41:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:41:50,502 INFO L85 PathProgramCache]: Analyzing trace with hash 770675280, now seen corresponding path program 1 times [2021-12-14 15:41:50,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:41:50,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148669524] [2021-12-14 15:41:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:41:50,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:41:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:50,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:41:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:50,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:41:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:50,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:41:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:50,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:41:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:50,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:41:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:41:50,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:41:50,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148669524] [2021-12-14 15:41:50,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148669524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:41:50,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:41:50,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:41:50,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136336618] [2021-12-14 15:41:50,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:41:50,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:41:50,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:41:50,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:41:50,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:41:50,635 INFO L87 Difference]: Start difference. First operand 2455 states and 4481 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) [2021-12-14 15:41:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:41:53,284 INFO L93 Difference]: Finished difference Result 3360 states and 5950 transitions. [2021-12-14 15:41:53,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:41:53,284 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 [2021-12-14 15:41:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:41:53,295 INFO L225 Difference]: With dead ends: 3360 [2021-12-14 15:41:53,295 INFO L226 Difference]: Without dead ends: 3044 [2021-12-14 15:41:53,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:41:53,304 INFO L933 BasicCegarLoop]: 4805 mSDtfsCounter, 5267 mSDsluCounter, 17593 mSDsCounter, 0 mSdLazyCounter, 2609 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5284 SdHoareTripleChecker+Valid, 22398 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:41:53,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5284 Valid, 22398 Invalid, 2690 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [81 Valid, 2609 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-14 15:41:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2021-12-14 15:41:53,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2787. [2021-12-14 15:41:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2724 states have (on average 1.803964757709251) internal successors, (4914), 2729 states have internal predecessors, (4914), 47 states have call successors, (47), 13 states have call predecessors, (47), 14 states have return successors, (52), 46 states have call predecessors, (52), 45 states have call successors, (52) [2021-12-14 15:41:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 5013 transitions. [2021-12-14 15:41:53,379 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 5013 transitions. Word has length 157 [2021-12-14 15:41:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:41:53,380 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 5013 transitions. [2021-12-14 15:41:53,380 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) [2021-12-14 15:41:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 5013 transitions. [2021-12-14 15:41:53,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:41:53,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:41:53,382 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] [2021-12-14 15:41:53,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:41:53,383 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:41:53,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:41:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash -846765170, now seen corresponding path program 1 times [2021-12-14 15:41:53,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:41:53,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572452315] [2021-12-14 15:41:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:41:53,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:41:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:53,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:41:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:53,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:41:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:53,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:41:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:53,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:41:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:53,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:41:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:41:53,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:41:53,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572452315] [2021-12-14 15:41:53,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572452315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:41:53,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:41:53,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:41:53,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371361186] [2021-12-14 15:41:53,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:41:53,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:41:53,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:41:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:41:53,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:41:53,543 INFO L87 Difference]: Start difference. First operand 2787 states and 5013 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) [2021-12-14 15:41:56,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:41:56,106 INFO L93 Difference]: Finished difference Result 4509 states and 7786 transitions. [2021-12-14 15:41:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:41:56,107 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 [2021-12-14 15:41:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:41:56,120 INFO L225 Difference]: With dead ends: 4509 [2021-12-14 15:41:56,121 INFO L226 Difference]: Without dead ends: 3863 [2021-12-14 15:41:56,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:41:56,125 INFO L933 BasicCegarLoop]: 4840 mSDtfsCounter, 5229 mSDsluCounter, 17601 mSDsCounter, 0 mSdLazyCounter, 2726 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5246 SdHoareTripleChecker+Valid, 22441 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:41:56,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5246 Valid, 22441 Invalid, 2810 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [84 Valid, 2726 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-14 15:41:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3863 states. [2021-12-14 15:41:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3863 to 3400. [2021-12-14 15:41:56,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3400 states, 3285 states have (on average 1.7634703196347032) internal successors, (5793), 3292 states have internal predecessors, (5793), 85 states have call successors, (85), 25 states have call predecessors, (85), 28 states have return successors, (100), 86 states have call predecessors, (100), 83 states have call successors, (100) [2021-12-14 15:41:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 5978 transitions. [2021-12-14 15:41:56,220 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 5978 transitions. Word has length 157 [2021-12-14 15:41:56,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:41:56,221 INFO L470 AbstractCegarLoop]: Abstraction has 3400 states and 5978 transitions. [2021-12-14 15:41:56,221 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) [2021-12-14 15:41:56,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 5978 transitions. [2021-12-14 15:41:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:41:56,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:41:56,224 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] [2021-12-14 15:41:56,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:41:56,224 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:41:56,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:41:56,225 INFO L85 PathProgramCache]: Analyzing trace with hash -483298672, now seen corresponding path program 1 times [2021-12-14 15:41:56,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:41:56,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791445022] [2021-12-14 15:41:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:41:56,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:41:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:56,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:41:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:56,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:41:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:56,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:41:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:56,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:41:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:56,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:41:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:41:56,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:41:56,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791445022] [2021-12-14 15:41:56,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791445022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:41:56,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:41:56,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:41:56,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832204229] [2021-12-14 15:41:56,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:41:56,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:41:56,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:41:56,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:41:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:41:56,328 INFO L87 Difference]: Start difference. First operand 3400 states and 5978 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) [2021-12-14 15:41:58,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:41:58,826 INFO L93 Difference]: Finished difference Result 6758 states and 11371 transitions. [2021-12-14 15:41:58,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:41:58,826 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 [2021-12-14 15:41:58,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:41:58,847 INFO L225 Difference]: With dead ends: 6758 [2021-12-14 15:41:58,848 INFO L226 Difference]: Without dead ends: 5499 [2021-12-14 15:41:58,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:41:58,855 INFO L933 BasicCegarLoop]: 4836 mSDtfsCounter, 5229 mSDsluCounter, 17601 mSDsCounter, 0 mSdLazyCounter, 2718 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5246 SdHoareTripleChecker+Valid, 22437 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 15:41:58,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5246 Valid, 22437 Invalid, 2803 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [85 Valid, 2718 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 15:41:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5499 states. [2021-12-14 15:41:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5499 to 4629. [2021-12-14 15:41:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4410 states have (on average 1.7131519274376417) internal successors, (7555), 4421 states have internal predecessors, (7555), 161 states have call successors, (161), 49 states have call predecessors, (161), 56 states have return successors, (202), 166 states have call predecessors, (202), 159 states have call successors, (202) [2021-12-14 15:41:59,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7918 transitions. [2021-12-14 15:41:59,058 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7918 transitions. Word has length 157 [2021-12-14 15:41:59,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:41:59,059 INFO L470 AbstractCegarLoop]: Abstraction has 4629 states and 7918 transitions. [2021-12-14 15:41:59,060 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) [2021-12-14 15:41:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7918 transitions. [2021-12-14 15:41:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:41:59,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:41:59,063 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] [2021-12-14 15:41:59,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:41:59,064 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:41:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:41:59,064 INFO L85 PathProgramCache]: Analyzing trace with hash -194479282, now seen corresponding path program 1 times [2021-12-14 15:41:59,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:41:59,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283022654] [2021-12-14 15:41:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:41:59,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:41:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:59,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:41:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:59,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:41:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:59,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:41:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:59,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:41:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:59,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:41:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:41:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:41:59,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:41:59,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283022654] [2021-12-14 15:41:59,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283022654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:41:59,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:41:59,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:41:59,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834538355] [2021-12-14 15:41:59,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:41:59,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:41:59,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:41:59,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:41:59,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:41:59,194 INFO L87 Difference]: Start difference. First operand 4629 states and 7918 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) [2021-12-14 15:42:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:42:00,411 INFO L93 Difference]: Finished difference Result 8031 states and 13424 transitions. [2021-12-14 15:42:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:42:00,412 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 [2021-12-14 15:42:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:42:00,431 INFO L225 Difference]: With dead ends: 8031 [2021-12-14 15:42:00,431 INFO L226 Difference]: Without dead ends: 5541 [2021-12-14 15:42:00,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:42:00,440 INFO L933 BasicCegarLoop]: 4515 mSDtfsCounter, 5065 mSDsluCounter, 12537 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5083 SdHoareTripleChecker+Valid, 17052 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 15:42:00,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5083 Valid, 17052 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 15:42:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2021-12-14 15:42:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 4629. [2021-12-14 15:42:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4410 states have (on average 1.711111111111111) internal successors, (7546), 4421 states have internal predecessors, (7546), 161 states have call successors, (161), 49 states have call predecessors, (161), 56 states have return successors, (202), 166 states have call predecessors, (202), 159 states have call successors, (202) [2021-12-14 15:42:00,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7909 transitions. [2021-12-14 15:42:00,613 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7909 transitions. Word has length 157 [2021-12-14 15:42:00,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:42:00,614 INFO L470 AbstractCegarLoop]: Abstraction has 4629 states and 7909 transitions. [2021-12-14 15:42:00,614 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) [2021-12-14 15:42:00,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7909 transitions. [2021-12-14 15:42:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:42:00,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:42:00,617 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] [2021-12-14 15:42:00,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:42:00,617 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:42:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:42:00,618 INFO L85 PathProgramCache]: Analyzing trace with hash -739351856, now seen corresponding path program 1 times [2021-12-14 15:42:00,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:42:00,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824387866] [2021-12-14 15:42:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:42:00,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:42:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:00,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:42:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:00,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:42:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:00,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:42:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:00,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:42:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:00,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:42:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:42:00,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:42:00,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824387866] [2021-12-14 15:42:00,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824387866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:42:00,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:42:00,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:42:00,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118560963] [2021-12-14 15:42:00,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:42:00,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:42:00,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:42:00,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:42:00,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:42:00,748 INFO L87 Difference]: Start difference. First operand 4629 states and 7909 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) [2021-12-14 15:42:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:42:01,906 INFO L93 Difference]: Finished difference Result 8022 states and 13381 transitions. [2021-12-14 15:42:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:42:01,906 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 [2021-12-14 15:42:01,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:42:01,921 INFO L225 Difference]: With dead ends: 8022 [2021-12-14 15:42:01,921 INFO L226 Difference]: Without dead ends: 5532 [2021-12-14 15:42:01,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:42:01,929 INFO L933 BasicCegarLoop]: 4511 mSDtfsCounter, 5063 mSDsluCounter, 12537 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5081 SdHoareTripleChecker+Valid, 17048 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 15:42:01,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5081 Valid, 17048 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 15:42:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2021-12-14 15:42:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 4629. [2021-12-14 15:42:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4410 states have (on average 1.7090702947845804) internal successors, (7537), 4421 states have internal predecessors, (7537), 161 states have call successors, (161), 49 states have call predecessors, (161), 56 states have return successors, (202), 166 states have call predecessors, (202), 159 states have call successors, (202) [2021-12-14 15:42:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7900 transitions. [2021-12-14 15:42:02,064 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7900 transitions. Word has length 157 [2021-12-14 15:42:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:42:02,065 INFO L470 AbstractCegarLoop]: Abstraction has 4629 states and 7900 transitions. [2021-12-14 15:42:02,065 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) [2021-12-14 15:42:02,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7900 transitions. [2021-12-14 15:42:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:42:02,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:42:02,068 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] [2021-12-14 15:42:02,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:42:02,068 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:42:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:42:02,069 INFO L85 PathProgramCache]: Analyzing trace with hash -64191730, now seen corresponding path program 1 times [2021-12-14 15:42:02,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:42:02,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395523964] [2021-12-14 15:42:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:42:02,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:42:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:02,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:42:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:02,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:42:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:02,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:42:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:02,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:42:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:02,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:42:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:42:02,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:42:02,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395523964] [2021-12-14 15:42:02,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395523964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:42:02,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:42:02,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:42:02,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467919845] [2021-12-14 15:42:02,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:42:02,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:42:02,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:42:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:42:02,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:42:02,185 INFO L87 Difference]: Start difference. First operand 4629 states and 7900 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) [2021-12-14 15:42:03,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:42:03,442 INFO L93 Difference]: Finished difference Result 8013 states and 13338 transitions. [2021-12-14 15:42:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:42:03,442 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 [2021-12-14 15:42:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:42:03,461 INFO L225 Difference]: With dead ends: 8013 [2021-12-14 15:42:03,461 INFO L226 Difference]: Without dead ends: 5523 [2021-12-14 15:42:03,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:42:03,469 INFO L933 BasicCegarLoop]: 4505 mSDtfsCounter, 4921 mSDsluCounter, 16672 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4939 SdHoareTripleChecker+Valid, 21177 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 15:42:03,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4939 Valid, 21177 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 15:42:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2021-12-14 15:42:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 4629. [2021-12-14 15:42:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4410 states have (on average 1.70702947845805) internal successors, (7528), 4421 states have internal predecessors, (7528), 161 states have call successors, (161), 49 states have call predecessors, (161), 56 states have return successors, (202), 166 states have call predecessors, (202), 159 states have call successors, (202) [2021-12-14 15:42:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 7891 transitions. [2021-12-14 15:42:03,604 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 7891 transitions. Word has length 157 [2021-12-14 15:42:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:42:03,604 INFO L470 AbstractCegarLoop]: Abstraction has 4629 states and 7891 transitions. [2021-12-14 15:42:03,605 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) [2021-12-14 15:42:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 7891 transitions. [2021-12-14 15:42:03,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:42:03,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:42:03,608 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] [2021-12-14 15:42:03,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:42:03,608 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:42:03,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:42:03,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1012243696, now seen corresponding path program 1 times [2021-12-14 15:42:03,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:42:03,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275974539] [2021-12-14 15:42:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:42:03,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:42:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:03,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:42:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:03,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:42:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:03,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:42:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:03,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:42:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:03,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:42:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:42:03,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:42:03,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275974539] [2021-12-14 15:42:03,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275974539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:42:03,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:42:03,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:42:03,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412342378] [2021-12-14 15:42:03,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:42:03,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:42:03,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:42:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:42:03,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:42:03,720 INFO L87 Difference]: Start difference. First operand 4629 states and 7891 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) [2021-12-14 15:42:06,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:42:06,241 INFO L93 Difference]: Finished difference Result 11219 states and 18367 transitions. [2021-12-14 15:42:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:42:06,241 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 [2021-12-14 15:42:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:42:06,262 INFO L225 Difference]: With dead ends: 11219 [2021-12-14 15:42:06,262 INFO L226 Difference]: Without dead ends: 8731 [2021-12-14 15:42:06,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:42:06,270 INFO L933 BasicCegarLoop]: 4808 mSDtfsCounter, 5251 mSDsluCounter, 17601 mSDsCounter, 0 mSdLazyCounter, 2570 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5268 SdHoareTripleChecker+Valid, 22409 SdHoareTripleChecker+Invalid, 2659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-14 15:42:06,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5268 Valid, 22409 Invalid, 2659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2570 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-14 15:42:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8731 states. [2021-12-14 15:42:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8731 to 7123. [2021-12-14 15:42:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7123 states, 6696 states have (on average 1.6539725209080047) internal successors, (11075), 6715 states have internal predecessors, (11075), 313 states have call successors, (313), 97 states have call predecessors, (313), 112 states have return successors, (424), 326 states have call predecessors, (424), 311 states have call successors, (424) [2021-12-14 15:42:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7123 states to 7123 states and 11812 transitions. [2021-12-14 15:42:06,513 INFO L78 Accepts]: Start accepts. Automaton has 7123 states and 11812 transitions. Word has length 157 [2021-12-14 15:42:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:42:06,513 INFO L470 AbstractCegarLoop]: Abstraction has 7123 states and 11812 transitions. [2021-12-14 15:42:06,513 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) [2021-12-14 15:42:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 7123 states and 11812 transitions. [2021-12-14 15:42:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:42:06,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:42:06,516 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] [2021-12-14 15:42:06,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 15:42:06,517 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:42:06,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:42:06,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1446749294, now seen corresponding path program 1 times [2021-12-14 15:42:06,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:42:06,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208362338] [2021-12-14 15:42:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:42:06,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:42:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:06,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:42:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:06,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:42:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:06,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:42:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:06,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:42:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:06,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:42:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:42:06,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:42:06,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208362338] [2021-12-14 15:42:06,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208362338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:42:06,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:42:06,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:42:06,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053413046] [2021-12-14 15:42:06,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:42:06,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:42:06,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:42:06,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:42:06,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:42:06,634 INFO L87 Difference]: Start difference. First operand 7123 states and 11812 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) [2021-12-14 15:42:09,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:42:09,244 INFO L93 Difference]: Finished difference Result 20205 states and 32648 transitions. [2021-12-14 15:42:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:42:09,245 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 [2021-12-14 15:42:09,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:42:09,284 INFO L225 Difference]: With dead ends: 20205 [2021-12-14 15:42:09,284 INFO L226 Difference]: Without dead ends: 15223 [2021-12-14 15:42:09,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:42:09,301 INFO L933 BasicCegarLoop]: 4764 mSDtfsCounter, 5277 mSDsluCounter, 17557 mSDsCounter, 0 mSdLazyCounter, 2474 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5294 SdHoareTripleChecker+Valid, 22321 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-14 15:42:09,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5294 Valid, 22321 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2474 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-14 15:42:09,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15223 states. [2021-12-14 15:42:09,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15223 to 12127. [2021-12-14 15:42:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12127 states, 11284 states have (on average 1.6122828784119108) internal successors, (18193), 11319 states have internal predecessors, (18193), 617 states have call successors, (617), 193 states have call predecessors, (617), 224 states have return successors, (922), 646 states have call predecessors, (922), 615 states have call successors, (922) [2021-12-14 15:42:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12127 states to 12127 states and 19732 transitions. [2021-12-14 15:42:09,769 INFO L78 Accepts]: Start accepts. Automaton has 12127 states and 19732 transitions. Word has length 157 [2021-12-14 15:42:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:42:09,770 INFO L470 AbstractCegarLoop]: Abstraction has 12127 states and 19732 transitions. [2021-12-14 15:42:09,770 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) [2021-12-14 15:42:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 12127 states and 19732 transitions. [2021-12-14 15:42:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:42:09,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:42:09,778 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] [2021-12-14 15:42:09,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:42:09,779 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:42:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:42:09,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1876407600, now seen corresponding path program 1 times [2021-12-14 15:42:09,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:42:09,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283360581] [2021-12-14 15:42:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:42:09,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:42:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:09,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:42:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:09,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:42:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:09,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:42:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:09,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:42:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:09,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:42:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:42:09,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:42:09,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283360581] [2021-12-14 15:42:09,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283360581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:42:09,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:42:09,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:42:09,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030358701] [2021-12-14 15:42:09,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:42:09,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:42:09,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:42:09,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:42:09,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:42:09,880 INFO L87 Difference]: Start difference. First operand 12127 states and 19732 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) [2021-12-14 15:42:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:42:13,727 INFO L93 Difference]: Finished difference Result 42945 states and 68700 transitions. [2021-12-14 15:42:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:42:13,727 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 [2021-12-14 15:42:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:42:13,820 INFO L225 Difference]: With dead ends: 42945 [2021-12-14 15:42:13,820 INFO L226 Difference]: Without dead ends: 32959 [2021-12-14 15:42:13,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:42:13,856 INFO L933 BasicCegarLoop]: 4796 mSDtfsCounter, 5661 mSDsluCounter, 17593 mSDsCounter, 0 mSdLazyCounter, 2547 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5689 SdHoareTripleChecker+Valid, 22389 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 15:42:13,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5689 Valid, 22389 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2547 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 15:42:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32959 states. [2021-12-14 15:42:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32959 to 22071. [2021-12-14 15:42:14,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22071 states, 20428 states have (on average 1.5866947327197964) internal successors, (32413), 20495 states have internal predecessors, (32413), 1193 states have call successors, (1193), 385 states have call predecessors, (1193), 448 states have return successors, (2048), 1254 states have call predecessors, (2048), 1191 states have call successors, (2048) [2021-12-14 15:42:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22071 states to 22071 states and 35654 transitions. [2021-12-14 15:42:14,911 INFO L78 Accepts]: Start accepts. Automaton has 22071 states and 35654 transitions. Word has length 157 [2021-12-14 15:42:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:42:14,912 INFO L470 AbstractCegarLoop]: Abstraction has 22071 states and 35654 transitions. [2021-12-14 15:42:14,912 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) [2021-12-14 15:42:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 22071 states and 35654 transitions. [2021-12-14 15:42:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:42:14,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:42:14,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:42:14,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 15:42:14,927 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:42:14,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:42:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1711963090, now seen corresponding path program 1 times [2021-12-14 15:42:14,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:42:14,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912366243] [2021-12-14 15:42:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:42:14,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:42:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:14,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:42:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:14,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:42:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:15,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:42:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:15,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:42:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:15,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:42:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:42:15,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:42:15,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912366243] [2021-12-14 15:42:15,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912366243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:42:15,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:42:15,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:42:15,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674522201] [2021-12-14 15:42:15,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:42:15,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:42:15,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:42:15,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:42:15,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:42:15,031 INFO L87 Difference]: Start difference. First operand 22071 states and 35654 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) [2021-12-14 15:42:21,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:42:21,175 INFO L93 Difference]: Finished difference Result 82601 states and 132504 transitions. [2021-12-14 15:42:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:42:21,176 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 [2021-12-14 15:42:21,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:42:21,377 INFO L225 Difference]: With dead ends: 82601 [2021-12-14 15:42:21,378 INFO L226 Difference]: Without dead ends: 62671 [2021-12-14 15:42:21,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:42:21,433 INFO L933 BasicCegarLoop]: 4946 mSDtfsCounter, 5346 mSDsluCounter, 17590 mSDsCounter, 0 mSdLazyCounter, 2997 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5362 SdHoareTripleChecker+Valid, 22536 SdHoareTripleChecker+Invalid, 3088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:42:21,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5362 Valid, 22536 Invalid, 3088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2997 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-14 15:42:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62671 states. [2021-12-14 15:42:23,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62671 to 41287. [2021-12-14 15:42:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41287 states, 38076 states have (on average 1.5687834856602585) internal successors, (59733), 38207 states have internal predecessors, (59733), 2313 states have call successors, (2313), 769 states have call predecessors, (2313), 896 states have return successors, (4754), 2438 states have call predecessors, (4754), 2311 states have call successors, (4754) [2021-12-14 15:42:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41287 states to 41287 states and 66800 transitions. [2021-12-14 15:42:23,589 INFO L78 Accepts]: Start accepts. Automaton has 41287 states and 66800 transitions. Word has length 157 [2021-12-14 15:42:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:42:23,590 INFO L470 AbstractCegarLoop]: Abstraction has 41287 states and 66800 transitions. [2021-12-14 15:42:23,590 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) [2021-12-14 15:42:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 41287 states and 66800 transitions. [2021-12-14 15:42:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:42:23,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:42:23,607 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] [2021-12-14 15:42:23,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 15:42:23,608 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:42:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:42:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1635966320, now seen corresponding path program 1 times [2021-12-14 15:42:23,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:42:23,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830503898] [2021-12-14 15:42:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:42:23,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:42:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:23,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:42:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:23,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 15:42:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:23,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 15:42:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:23,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-14 15:42:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:23,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-14 15:42:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:42:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:42:23,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:42:23,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830503898] [2021-12-14 15:42:23,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830503898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:42:23,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:42:23,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:42:23,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029219218] [2021-12-14 15:42:23,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:42:23,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:42:23,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:42:23,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:42:23,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:42:23,712 INFO L87 Difference]: Start difference. First operand 41287 states and 66800 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) [2021-12-14 15:42:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:42:34,065 INFO L93 Difference]: Finished difference Result 158809 states and 256648 transitions. [2021-12-14 15:42:34,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:42:34,065 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 [2021-12-14 15:42:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:42:34,468 INFO L225 Difference]: With dead ends: 158809 [2021-12-14 15:42:34,468 INFO L226 Difference]: Without dead ends: 119663 [2021-12-14 15:42:34,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:42:34,699 INFO L933 BasicCegarLoop]: 4786 mSDtfsCounter, 5585 mSDsluCounter, 17593 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5613 SdHoareTripleChecker+Valid, 22379 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 15:42:34,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5613 Valid, 22379 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 15:42:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119663 states. [2021-12-14 15:42:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119663 to 80295. [2021-12-14 15:42:39,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80295 states, 74012 states have (on average 1.5617602550937686) internal successors, (115589), 74271 states have internal predecessors, (115589), 4489 states have call successors, (4489), 1537 states have call predecessors, (4489), 1792 states have return successors, (11560), 4742 states have call predecessors, (11560), 4487 states have call successors, (11560) [2021-12-14 15:42:39,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80295 states to 80295 states and 131638 transitions. [2021-12-14 15:42:39,638 INFO L78 Accepts]: Start accepts. Automaton has 80295 states and 131638 transitions. Word has length 157 [2021-12-14 15:42:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:42:39,638 INFO L470 AbstractCegarLoop]: Abstraction has 80295 states and 131638 transitions. [2021-12-14 15:42:39,638 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) [2021-12-14 15:42:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 80295 states and 131638 transitions. [2021-12-14 15:42:39,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-14 15:42:39,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:42:39,839 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] [2021-12-14 15:42:39,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 15:42:39,840 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:42:39,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:42:39,840 INFO L85 PathProgramCache]: Analyzing trace with hash -774132718, now seen corresponding path program 1 times [2021-12-14 15:42:39,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:42:39,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271629958] [2021-12-14 15:42:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:42:39,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:42:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat