./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU --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 558f970b63375a18824a4471ce91e71e4e14632a20bfa5002df552fa8b202ea3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:54:48,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:54:48,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:54:48,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:54:48,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:54:48,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:54:48,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:54:48,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:54:48,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:54:48,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:54:48,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:54:48,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:54:48,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:54:48,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:54:48,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:54:48,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:54:48,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:54:48,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:54:48,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:54:48,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:54:48,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:54:48,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:54:48,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:54:48,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:54:48,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:54:48,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:54:48,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:54:48,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:54:48,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:54:48,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:54:48,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:54:48,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:54:48,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:54:48,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:54:48,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:54:48,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:54:48,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:54:48,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:54:48,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:54:48,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:54:48,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:54:48,670 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:54:48,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:54:48,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:54:48,739 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:54:48,739 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:54:48,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:54:48,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:54:48,742 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:54:48,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:54:48,743 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:54:48,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:54:48,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:54:48,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:54:48,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:54:48,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:54:48,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:54:48,746 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:54:48,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:54:48,747 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:54:48,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:54:48,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:54:48,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:54:48,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:54:48,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:54:48,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:54:48,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:54:48,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:54:48,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:54:48,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:54:48,751 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:54:48,751 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:54:48,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:54:48,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:54:48,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 558f970b63375a18824a4471ce91e71e4e14632a20bfa5002df552fa8b202ea3 [2021-11-02 22:54:49,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:54:49,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:54:49,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:54:49,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:54:49,118 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:54:49,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c [2021-11-02 22:54:49,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/data/6ceaaa2a0/e7b28c51b0414f08b8e7c1ebc71a8fc4/FLAG79c35e4f5 [2021-11-02 22:54:49,837 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:54:49,837 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c [2021-11-02 22:54:49,865 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/data/6ceaaa2a0/e7b28c51b0414f08b8e7c1ebc71a8fc4/FLAG79c35e4f5 [2021-11-02 22:54:50,111 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/data/6ceaaa2a0/e7b28c51b0414f08b8e7c1ebc71a8fc4 [2021-11-02 22:54:50,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:54:50,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:54:50,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:54:50,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:54:50,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:54:50,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:54:50" (1/1) ... [2021-11-02 22:54:50,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1185e7e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50, skipping insertion in model container [2021-11-02 22:54:50,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:54:50" (1/1) ... [2021-11-02 22:54:50,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:54:50,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:54:50,531 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c[14509,14522] [2021-11-02 22:54:50,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:54:50,547 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:54:50,643 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c[14509,14522] [2021-11-02 22:54:50,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:54:50,663 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:54:50,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50 WrapperNode [2021-11-02 22:54:50,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:54:50,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:54:50,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:54:50,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:54:50,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50" (1/1) ... [2021-11-02 22:54:50,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50" (1/1) ... [2021-11-02 22:54:50,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:54:50,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:54:50,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:54:50,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:54:50,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50" (1/1) ... [2021-11-02 22:54:50,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50" (1/1) ... [2021-11-02 22:54:50,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50" (1/1) ... [2021-11-02 22:54:50,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50" (1/1) ... [2021-11-02 22:54:50,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50" (1/1) ... [2021-11-02 22:54:50,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50" (1/1) ... [2021-11-02 22:54:50,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50" (1/1) ... [2021-11-02 22:54:50,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:54:50,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:54:50,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:54:50,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:54:50,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50" (1/1) ... [2021-11-02 22:54:50,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:54:50,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:50,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:54:50,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd42c748-3c13-4cc9-bf8e-de6ef299e745/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:54:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:54:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:54:50,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:54:50,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:54:51,942 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:54:51,954 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-11-02 22:54:51,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:54:51 BoogieIcfgContainer [2021-11-02 22:54:51,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:54:51,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:54:51,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:54:51,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:54:51,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:54:50" (1/3) ... [2021-11-02 22:54:51,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b9f6d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:54:51, skipping insertion in model container [2021-11-02 22:54:51,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:50" (2/3) ... [2021-11-02 22:54:51,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b9f6d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:54:51, skipping insertion in model container [2021-11-02 22:54:51,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:54:51" (3/3) ... [2021-11-02 22:54:51,972 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c [2021-11-02 22:54:51,979 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:54:51,979 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:54:52,068 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:54:52,079 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 [2021-11-02 22:54:52,079 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:54:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.7534246575342465) internal successors, (256), 147 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:52,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:54:52,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:52,111 INFO L513 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] [2021-11-02 22:54:52,111 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:52,118 INFO L85 PathProgramCache]: Analyzing trace with hash -812713456, now seen corresponding path program 1 times [2021-11-02 22:54:52,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:52,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630977789] [2021-11-02 22:54:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:52,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:52,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:52,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630977789] [2021-11-02 22:54:52,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630977789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:52,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:52,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:54:52,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340583162] [2021-11-02 22:54:52,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:54:52,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:52,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:54:52,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:54:52,521 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.7534246575342465) internal successors, (256), 147 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:52,578 INFO L93 Difference]: Finished difference Result 233 states and 401 transitions. [2021-11-02 22:54:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:54:52,580 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-02 22:54:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:52,598 INFO L225 Difference]: With dead ends: 233 [2021-11-02 22:54:52,599 INFO L226 Difference]: Without dead ends: 144 [2021-11-02 22:54:52,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:54:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-02 22:54:52,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-11-02 22:54:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.7412587412587412) internal successors, (249), 143 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 249 transitions. [2021-11-02 22:54:52,683 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 249 transitions. Word has length 37 [2021-11-02 22:54:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:52,684 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 249 transitions. [2021-11-02 22:54:52,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 249 transitions. [2021-11-02 22:54:52,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:54:52,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:52,694 INFO L513 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] [2021-11-02 22:54:52,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:54:52,695 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:52,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:52,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1630361906, now seen corresponding path program 1 times [2021-11-02 22:54:52,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:52,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489115876] [2021-11-02 22:54:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:52,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:52,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:52,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489115876] [2021-11-02 22:54:52,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489115876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:52,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:52,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:54:52,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738792605] [2021-11-02 22:54:52,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:54:52,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:52,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:54:52,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:54:52,962 INFO L87 Difference]: Start difference. First operand 144 states and 249 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:53,102 INFO L93 Difference]: Finished difference Result 232 states and 394 transitions. [2021-11-02 22:54:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:54:53,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-02 22:54:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:53,109 INFO L225 Difference]: With dead ends: 232 [2021-11-02 22:54:53,109 INFO L226 Difference]: Without dead ends: 144 [2021-11-02 22:54:53,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:54:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-02 22:54:53,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-11-02 22:54:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.5314685314685315) internal successors, (219), 143 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 219 transitions. [2021-11-02 22:54:53,132 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 219 transitions. Word has length 37 [2021-11-02 22:54:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:53,132 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 219 transitions. [2021-11-02 22:54:53,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 219 transitions. [2021-11-02 22:54:53,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:54:53,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:53,140 INFO L513 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] [2021-11-02 22:54:53,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:54:53,141 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:53,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:53,143 INFO L85 PathProgramCache]: Analyzing trace with hash 190573204, now seen corresponding path program 1 times [2021-11-02 22:54:53,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:53,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841071591] [2021-11-02 22:54:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:53,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:53,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:53,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841071591] [2021-11-02 22:54:53,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841071591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:53,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:53,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:54:53,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167900117] [2021-11-02 22:54:53,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:54:53,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:53,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:54:53,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:53,353 INFO L87 Difference]: Start difference. First operand 144 states and 219 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:53,421 INFO L93 Difference]: Finished difference Result 302 states and 483 transitions. [2021-11-02 22:54:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:54:53,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 22:54:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:53,425 INFO L225 Difference]: With dead ends: 302 [2021-11-02 22:54:53,426 INFO L226 Difference]: Without dead ends: 218 [2021-11-02 22:54:53,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:53,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-02 22:54:53,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2021-11-02 22:54:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.560747663551402) internal successors, (334), 214 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 334 transitions. [2021-11-02 22:54:53,461 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 334 transitions. Word has length 66 [2021-11-02 22:54:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:53,462 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 334 transitions. [2021-11-02 22:54:53,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 334 transitions. [2021-11-02 22:54:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 22:54:53,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:53,464 INFO L513 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] [2021-11-02 22:54:53,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:54:53,464 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:53,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:53,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1527919177, now seen corresponding path program 1 times [2021-11-02 22:54:53,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:53,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620220426] [2021-11-02 22:54:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:53,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:53,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:53,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620220426] [2021-11-02 22:54:53,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620220426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:53,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:53,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:54:53,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096306919] [2021-11-02 22:54:53,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:54:53,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:53,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:54:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:53,560 INFO L87 Difference]: Start difference. First operand 215 states and 334 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:53,596 INFO L93 Difference]: Finished difference Result 509 states and 818 transitions. [2021-11-02 22:54:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:54:53,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 22:54:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:53,600 INFO L225 Difference]: With dead ends: 509 [2021-11-02 22:54:53,600 INFO L226 Difference]: Without dead ends: 354 [2021-11-02 22:54:53,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-02 22:54:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 350. [2021-11-02 22:54:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.5902578796561604) internal successors, (555), 349 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 555 transitions. [2021-11-02 22:54:53,620 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 555 transitions. Word has length 68 [2021-11-02 22:54:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:53,621 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 555 transitions. [2021-11-02 22:54:53,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 555 transitions. [2021-11-02 22:54:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:54:53,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:53,623 INFO L513 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] [2021-11-02 22:54:53,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:54:53,624 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:53,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1063335298, now seen corresponding path program 1 times [2021-11-02 22:54:53,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:53,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969814716] [2021-11-02 22:54:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:53,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:53,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:53,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969814716] [2021-11-02 22:54:53,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969814716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:53,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:53,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:54:53,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204893260] [2021-11-02 22:54:53,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:54:53,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:54:53,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:53,762 INFO L87 Difference]: Start difference. First operand 350 states and 555 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:53,846 INFO L93 Difference]: Finished difference Result 898 states and 1453 transitions. [2021-11-02 22:54:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:54:53,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-02 22:54:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:53,852 INFO L225 Difference]: With dead ends: 898 [2021-11-02 22:54:53,852 INFO L226 Difference]: Without dead ends: 608 [2021-11-02 22:54:53,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-02 22:54:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 602. [2021-11-02 22:54:53,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 1.6023294509151413) internal successors, (963), 601 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:53,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 963 transitions. [2021-11-02 22:54:53,907 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 963 transitions. Word has length 70 [2021-11-02 22:54:53,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:53,910 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 963 transitions. [2021-11-02 22:54:53,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 963 transitions. [2021-11-02 22:54:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 22:54:53,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:53,913 INFO L513 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] [2021-11-02 22:54:53,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:54:53,913 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:53,914 INFO L85 PathProgramCache]: Analyzing trace with hash 845837107, now seen corresponding path program 1 times [2021-11-02 22:54:53,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:53,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801868661] [2021-11-02 22:54:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:53,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:54,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:54,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801868661] [2021-11-02 22:54:54,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801868661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:54,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:54,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:54:54,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039966546] [2021-11-02 22:54:54,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:54:54,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:54,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:54:54,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:54:54,075 INFO L87 Difference]: Start difference. First operand 602 states and 963 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:54,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:54,307 INFO L93 Difference]: Finished difference Result 2586 states and 4245 transitions. [2021-11-02 22:54:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:54:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-02 22:54:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:54,334 INFO L225 Difference]: With dead ends: 2586 [2021-11-02 22:54:54,334 INFO L226 Difference]: Without dead ends: 2044 [2021-11-02 22:54:54,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:54:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-11-02 22:54:54,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1077. [2021-11-02 22:54:54,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.6161710037174721) internal successors, (1739), 1076 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:54,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1739 transitions. [2021-11-02 22:54:54,426 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1739 transitions. Word has length 72 [2021-11-02 22:54:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:54,427 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 1739 transitions. [2021-11-02 22:54:54,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1739 transitions. [2021-11-02 22:54:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 22:54:54,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:54,429 INFO L513 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] [2021-11-02 22:54:54,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:54:54,430 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:54,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:54,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1471686026, now seen corresponding path program 1 times [2021-11-02 22:54:54,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:54,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612361880] [2021-11-02 22:54:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:54,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:54,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:54,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612361880] [2021-11-02 22:54:54,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612361880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:54,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:54,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:54:54,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879478600] [2021-11-02 22:54:54,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:54:54,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:54,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:54:54,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:54,553 INFO L87 Difference]: Start difference. First operand 1077 states and 1739 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:54,680 INFO L93 Difference]: Finished difference Result 3138 states and 5142 transitions. [2021-11-02 22:54:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:54:54,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-02 22:54:54,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:54,697 INFO L225 Difference]: With dead ends: 3138 [2021-11-02 22:54:54,697 INFO L226 Difference]: Without dead ends: 2121 [2021-11-02 22:54:54,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:54:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-11-02 22:54:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1590. [2021-11-02 22:54:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 1.6242920075519194) internal successors, (2581), 1589 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2581 transitions. [2021-11-02 22:54:54,784 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2581 transitions. Word has length 73 [2021-11-02 22:54:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:54,785 INFO L470 AbstractCegarLoop]: Abstraction has 1590 states and 2581 transitions. [2021-11-02 22:54:54,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:54,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2581 transitions. [2021-11-02 22:54:54,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 22:54:54,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:54,788 INFO L513 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] [2021-11-02 22:54:54,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:54:54,788 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:54,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:54,789 INFO L85 PathProgramCache]: Analyzing trace with hash -131454774, now seen corresponding path program 1 times [2021-11-02 22:54:54,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:54,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620324516] [2021-11-02 22:54:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:54,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:54,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:54,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620324516] [2021-11-02 22:54:54,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620324516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:54,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:54,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:54:54,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514912315] [2021-11-02 22:54:54,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:54:54,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:54,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:54:54,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:54,883 INFO L87 Difference]: Start difference. First operand 1590 states and 2581 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:55,056 INFO L93 Difference]: Finished difference Result 4612 states and 7546 transitions. [2021-11-02 22:54:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:54:55,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-02 22:54:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:55,079 INFO L225 Difference]: With dead ends: 4612 [2021-11-02 22:54:55,079 INFO L226 Difference]: Without dead ends: 3082 [2021-11-02 22:54:55,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:54:55,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2021-11-02 22:54:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 2324. [2021-11-02 22:54:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 1.623331898407232) internal successors, (3771), 2323 states have internal predecessors, (3771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 3771 transitions. [2021-11-02 22:54:55,227 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 3771 transitions. Word has length 74 [2021-11-02 22:54:55,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:55,228 INFO L470 AbstractCegarLoop]: Abstraction has 2324 states and 3771 transitions. [2021-11-02 22:54:55,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 3771 transitions. [2021-11-02 22:54:55,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 22:54:55,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:55,235 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:55,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:54:55,236 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:55,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:55,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1364954579, now seen corresponding path program 1 times [2021-11-02 22:54:55,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:55,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626080279] [2021-11-02 22:54:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:55,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:55,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:55,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626080279] [2021-11-02 22:54:55,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626080279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:55,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:55,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:54:55,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120739393] [2021-11-02 22:54:55,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:54:55,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:55,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:54:55,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:55,400 INFO L87 Difference]: Start difference. First operand 2324 states and 3771 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:55,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:55,620 INFO L93 Difference]: Finished difference Result 6980 states and 11396 transitions. [2021-11-02 22:54:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:54:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-02 22:54:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:55,655 INFO L225 Difference]: With dead ends: 6980 [2021-11-02 22:54:55,655 INFO L226 Difference]: Without dead ends: 4716 [2021-11-02 22:54:55,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4716 states. [2021-11-02 22:54:55,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4716 to 3366. [2021-11-02 22:54:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 1.6210995542347697) internal successors, (5455), 3365 states have internal predecessors, (5455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 5455 transitions. [2021-11-02 22:54:55,909 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 5455 transitions. Word has length 75 [2021-11-02 22:54:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:55,910 INFO L470 AbstractCegarLoop]: Abstraction has 3366 states and 5455 transitions. [2021-11-02 22:54:55,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:55,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 5455 transitions. [2021-11-02 22:54:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:54:55,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:55,913 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:55,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:54:55,913 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:55,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:55,914 INFO L85 PathProgramCache]: Analyzing trace with hash 915332421, now seen corresponding path program 1 times [2021-11-02 22:54:55,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:55,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487278232] [2021-11-02 22:54:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:55,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:55,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:55,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487278232] [2021-11-02 22:54:55,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487278232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:55,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:55,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:54:55,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661547122] [2021-11-02 22:54:55,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:54:55,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:55,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:54:55,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:55,983 INFO L87 Difference]: Start difference. First operand 3366 states and 5455 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:56,216 INFO L93 Difference]: Finished difference Result 7652 states and 12412 transitions. [2021-11-02 22:54:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:54:56,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 22:54:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:56,256 INFO L225 Difference]: With dead ends: 7652 [2021-11-02 22:54:56,256 INFO L226 Difference]: Without dead ends: 5262 [2021-11-02 22:54:56,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:56,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5262 states. [2021-11-02 22:54:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5262 to 5260. [2021-11-02 22:54:56,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5260 states, 5259 states have (on average 1.609051150408823) internal successors, (8462), 5259 states have internal predecessors, (8462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5260 states to 5260 states and 8462 transitions. [2021-11-02 22:54:56,589 INFO L78 Accepts]: Start accepts. Automaton has 5260 states and 8462 transitions. Word has length 76 [2021-11-02 22:54:56,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:56,589 INFO L470 AbstractCegarLoop]: Abstraction has 5260 states and 8462 transitions. [2021-11-02 22:54:56,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:56,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5260 states and 8462 transitions. [2021-11-02 22:54:56,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:54:56,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:56,592 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:56,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:54:56,592 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:56,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:56,593 INFO L85 PathProgramCache]: Analyzing trace with hash -318395451, now seen corresponding path program 1 times [2021-11-02 22:54:56,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:56,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215033216] [2021-11-02 22:54:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:56,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:56,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:56,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215033216] [2021-11-02 22:54:56,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215033216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:56,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:56,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:54:56,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034388564] [2021-11-02 22:54:56,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:54:56,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:54:56,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:56,663 INFO L87 Difference]: Start difference. First operand 5260 states and 8462 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:57,004 INFO L93 Difference]: Finished difference Result 11472 states and 18516 transitions. [2021-11-02 22:54:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:54:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 22:54:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:57,073 INFO L225 Difference]: With dead ends: 11472 [2021-11-02 22:54:57,073 INFO L226 Difference]: Without dead ends: 7772 [2021-11-02 22:54:57,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7772 states. [2021-11-02 22:54:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7772 to 7770. [2021-11-02 22:54:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7770 states, 7769 states have (on average 1.6020079804350624) internal successors, (12446), 7769 states have internal predecessors, (12446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7770 states to 7770 states and 12446 transitions. [2021-11-02 22:54:57,624 INFO L78 Accepts]: Start accepts. Automaton has 7770 states and 12446 transitions. Word has length 76 [2021-11-02 22:54:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:57,625 INFO L470 AbstractCegarLoop]: Abstraction has 7770 states and 12446 transitions. [2021-11-02 22:54:57,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 7770 states and 12446 transitions. [2021-11-02 22:54:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:54:57,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:57,628 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:57,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:54:57,629 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:57,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:57,630 INFO L85 PathProgramCache]: Analyzing trace with hash 700947013, now seen corresponding path program 1 times [2021-11-02 22:54:57,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:57,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693945737] [2021-11-02 22:54:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:57,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:57,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:57,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693945737] [2021-11-02 22:54:57,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693945737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:57,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:57,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:54:57,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846011398] [2021-11-02 22:54:57,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:54:57,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:57,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:54:57,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:57,714 INFO L87 Difference]: Start difference. First operand 7770 states and 12446 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:58,254 INFO L93 Difference]: Finished difference Result 17197 states and 27794 transitions. [2021-11-02 22:54:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:54:58,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 22:54:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:58,286 INFO L225 Difference]: With dead ends: 17197 [2021-11-02 22:54:58,287 INFO L226 Difference]: Without dead ends: 11540 [2021-11-02 22:54:58,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:58,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11540 states. [2021-11-02 22:54:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11540 to 11538. [2021-11-02 22:54:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11538 states, 11537 states have (on average 1.5985958221374708) internal successors, (18443), 11537 states have internal predecessors, (18443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11538 states to 11538 states and 18443 transitions. [2021-11-02 22:54:58,914 INFO L78 Accepts]: Start accepts. Automaton has 11538 states and 18443 transitions. Word has length 76 [2021-11-02 22:54:58,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:58,915 INFO L470 AbstractCegarLoop]: Abstraction has 11538 states and 18443 transitions. [2021-11-02 22:54:58,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 11538 states and 18443 transitions. [2021-11-02 22:54:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:54:58,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:58,917 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:58,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:54:58,917 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:58,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:58,918 INFO L85 PathProgramCache]: Analyzing trace with hash 411123109, now seen corresponding path program 1 times [2021-11-02 22:54:58,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:58,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883257427] [2021-11-02 22:54:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:58,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:59,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:59,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883257427] [2021-11-02 22:54:59,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883257427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:59,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:59,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:54:59,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493889360] [2021-11-02 22:54:59,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:54:59,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:59,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:54:59,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:59,064 INFO L87 Difference]: Start difference. First operand 11538 states and 18443 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:00,190 INFO L93 Difference]: Finished difference Result 34109 states and 54457 transitions. [2021-11-02 22:55:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:55:00,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 22:55:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:00,254 INFO L225 Difference]: With dead ends: 34109 [2021-11-02 22:55:00,254 INFO L226 Difference]: Without dead ends: 22580 [2021-11-02 22:55:00,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:00,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22580 states. [2021-11-02 22:55:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22580 to 22578. [2021-11-02 22:55:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22578 states, 22577 states have (on average 1.5857731319484432) internal successors, (35802), 22577 states have internal predecessors, (35802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:01,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22578 states to 22578 states and 35802 transitions. [2021-11-02 22:55:01,783 INFO L78 Accepts]: Start accepts. Automaton has 22578 states and 35802 transitions. Word has length 77 [2021-11-02 22:55:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:01,784 INFO L470 AbstractCegarLoop]: Abstraction has 22578 states and 35802 transitions. [2021-11-02 22:55:01,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:01,784 INFO L276 IsEmpty]: Start isEmpty. Operand 22578 states and 35802 transitions. [2021-11-02 22:55:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 22:55:01,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:01,787 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:01,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:55:01,788 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:55:01,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:01,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1502774817, now seen corresponding path program 1 times [2021-11-02 22:55:01,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:01,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109009850] [2021-11-02 22:55:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:01,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:01,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:01,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109009850] [2021-11-02 22:55:01,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109009850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:01,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:01,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:55:01,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345894719] [2021-11-02 22:55:01,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:55:01,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:55:01,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:55:01,841 INFO L87 Difference]: Start difference. First operand 22578 states and 35802 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:03,352 INFO L93 Difference]: Finished difference Result 54911 states and 87576 transitions. [2021-11-02 22:55:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:55:03,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-02 22:55:03,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:03,462 INFO L225 Difference]: With dead ends: 54911 [2021-11-02 22:55:03,463 INFO L226 Difference]: Without dead ends: 32462 [2021-11-02 22:55:03,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:55:03,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32462 states. [2021-11-02 22:55:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32462 to 31186. [2021-11-02 22:55:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31186 states, 31185 states have (on average 1.5826519159852492) internal successors, (49355), 31185 states have internal predecessors, (49355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31186 states to 31186 states and 49355 transitions. [2021-11-02 22:55:05,329 INFO L78 Accepts]: Start accepts. Automaton has 31186 states and 49355 transitions. Word has length 78 [2021-11-02 22:55:05,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:05,330 INFO L470 AbstractCegarLoop]: Abstraction has 31186 states and 49355 transitions. [2021-11-02 22:55:05,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:05,330 INFO L276 IsEmpty]: Start isEmpty. Operand 31186 states and 49355 transitions. [2021-11-02 22:55:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 22:55:05,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:05,332 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:05,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:55:05,332 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:55:05,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:05,333 INFO L85 PathProgramCache]: Analyzing trace with hash -225322511, now seen corresponding path program 1 times [2021-11-02 22:55:05,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:05,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797523141] [2021-11-02 22:55:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:05,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:05,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:05,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797523141] [2021-11-02 22:55:05,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797523141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:05,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:05,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:55:05,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889343420] [2021-11-02 22:55:05,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:55:05,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:05,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:55:05,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:55:05,379 INFO L87 Difference]: Start difference. First operand 31186 states and 49355 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:07,278 INFO L93 Difference]: Finished difference Result 93520 states and 148003 transitions. [2021-11-02 22:55:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:55:07,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-02 22:55:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:07,411 INFO L225 Difference]: With dead ends: 93520 [2021-11-02 22:55:07,411 INFO L226 Difference]: Without dead ends: 62362 [2021-11-02 22:55:07,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:55:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62362 states. [2021-11-02 22:55:09,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62362 to 31188. [2021-11-02 22:55:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31188 states, 31187 states have (on average 1.5826145509346843) internal successors, (49357), 31187 states have internal predecessors, (49357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31188 states to 31188 states and 49357 transitions. [2021-11-02 22:55:09,358 INFO L78 Accepts]: Start accepts. Automaton has 31188 states and 49357 transitions. Word has length 78 [2021-11-02 22:55:09,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:09,358 INFO L470 AbstractCegarLoop]: Abstraction has 31188 states and 49357 transitions. [2021-11-02 22:55:09,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 31188 states and 49357 transitions. [2021-11-02 22:55:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:55:09,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:09,361 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:09,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:55:09,361 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:55:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:09,362 INFO L85 PathProgramCache]: Analyzing trace with hash -577611119, now seen corresponding path program 1 times [2021-11-02 22:55:09,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:09,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637052920] [2021-11-02 22:55:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:09,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:09,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:09,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637052920] [2021-11-02 22:55:09,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637052920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:09,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:09,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:55:09,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333560326] [2021-11-02 22:55:09,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:55:09,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:09,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:55:09,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:09,505 INFO L87 Difference]: Start difference. First operand 31188 states and 49357 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:11,565 INFO L93 Difference]: Finished difference Result 92206 states and 145749 transitions. [2021-11-02 22:55:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:55:11,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 22:55:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:11,688 INFO L225 Difference]: With dead ends: 92206 [2021-11-02 22:55:11,688 INFO L226 Difference]: Without dead ends: 61048 [2021-11-02 22:55:11,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:11,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61048 states. [2021-11-02 22:55:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61048 to 61046. [2021-11-02 22:55:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61046 states, 61045 states have (on average 1.5706446064378736) internal successors, (95880), 61045 states have internal predecessors, (95880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61046 states to 61046 states and 95880 transitions. [2021-11-02 22:55:14,557 INFO L78 Accepts]: Start accepts. Automaton has 61046 states and 95880 transitions. Word has length 79 [2021-11-02 22:55:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:14,558 INFO L470 AbstractCegarLoop]: Abstraction has 61046 states and 95880 transitions. [2021-11-02 22:55:14,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:14,558 INFO L276 IsEmpty]: Start isEmpty. Operand 61046 states and 95880 transitions. [2021-11-02 22:55:14,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 22:55:14,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:14,560 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:14,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:55:14,561 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:55:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:14,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1003564987, now seen corresponding path program 1 times [2021-11-02 22:55:14,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:14,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756643552] [2021-11-02 22:55:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:14,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:14,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:14,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756643552] [2021-11-02 22:55:14,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756643552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:14,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:14,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:55:14,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002380845] [2021-11-02 22:55:14,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:55:14,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:55:14,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:55:14,630 INFO L87 Difference]: Start difference. First operand 61046 states and 95880 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:17,500 INFO L93 Difference]: Finished difference Result 148150 states and 233536 transitions. [2021-11-02 22:55:17,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:55:17,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-02 22:55:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:17,674 INFO L225 Difference]: With dead ends: 148150 [2021-11-02 22:55:17,674 INFO L226 Difference]: Without dead ends: 87384 [2021-11-02 22:55:17,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:55:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87384 states. [2021-11-02 22:55:21,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87384 to 84054. [2021-11-02 22:55:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84054 states, 84053 states have (on average 1.5645128668816104) internal successors, (131502), 84053 states have internal predecessors, (131502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84054 states to 84054 states and 131502 transitions. [2021-11-02 22:55:21,266 INFO L78 Accepts]: Start accepts. Automaton has 84054 states and 131502 transitions. Word has length 80 [2021-11-02 22:55:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:21,267 INFO L470 AbstractCegarLoop]: Abstraction has 84054 states and 131502 transitions. [2021-11-02 22:55:21,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 84054 states and 131502 transitions. [2021-11-02 22:55:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 22:55:21,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:21,269 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:21,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:55:21,269 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:55:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:21,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1064997795, now seen corresponding path program 1 times [2021-11-02 22:55:21,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:21,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459222739] [2021-11-02 22:55:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:21,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:21,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:21,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459222739] [2021-11-02 22:55:21,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459222739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:21,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:21,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:55:21,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509216017] [2021-11-02 22:55:21,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:55:21,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:55:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:55:21,308 INFO L87 Difference]: Start difference. First operand 84054 states and 131502 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:27,231 INFO L93 Difference]: Finished difference Result 252086 states and 394386 transitions. [2021-11-02 22:55:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:55:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-02 22:55:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:27,576 INFO L225 Difference]: With dead ends: 252086 [2021-11-02 22:55:27,576 INFO L226 Difference]: Without dead ends: 168076 [2021-11-02 22:55:27,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:55:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168076 states. [2021-11-02 22:55:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168076 to 84058. [2021-11-02 22:55:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84058 states, 84057 states have (on average 1.5644860035452133) internal successors, (131506), 84057 states have internal predecessors, (131506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84058 states to 84058 states and 131506 transitions. [2021-11-02 22:55:32,054 INFO L78 Accepts]: Start accepts. Automaton has 84058 states and 131506 transitions. Word has length 80 [2021-11-02 22:55:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:32,054 INFO L470 AbstractCegarLoop]: Abstraction has 84058 states and 131506 transitions. [2021-11-02 22:55:32,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 84058 states and 131506 transitions. [2021-11-02 22:55:32,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 22:55:32,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:32,056 INFO L513 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] [2021-11-02 22:55:32,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:55:32,056 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:55:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1530707325, now seen corresponding path program 1 times [2021-11-02 22:55:32,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:32,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383015035] [2021-11-02 22:55:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:32,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:32,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:32,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383015035] [2021-11-02 22:55:32,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383015035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:32,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:32,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:55:32,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67064795] [2021-11-02 22:55:32,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:55:32,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:32,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:55:32,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:32,141 INFO L87 Difference]: Start difference. First operand 84058 states and 131506 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:55:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:38,757 INFO L93 Difference]: Finished difference Result 248426 states and 388114 transitions. [2021-11-02 22:55:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:55:38,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-02 22:55:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:39,076 INFO L225 Difference]: With dead ends: 248426 [2021-11-02 22:55:39,076 INFO L226 Difference]: Without dead ends: 164416 [2021-11-02 22:55:39,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164416 states.