./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.12.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G --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 962623ba1d780e7ad35b9b6d7f5839750bc2f361556d46080824a3701cf71595 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:47:40,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:47:40,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:47:40,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:47:40,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:47:40,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:47:40,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:47:40,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:47:40,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:47:40,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:47:40,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:47:40,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:47:40,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:47:40,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:47:40,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:47:40,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:47:40,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:47:40,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:47:40,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:47:40,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:47:40,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:47:40,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:47:40,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:47:40,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:47:40,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:47:40,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:47:40,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:47:40,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:47:40,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:47:40,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:47:40,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:47:40,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:47:40,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:47:40,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:47:40,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:47:40,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:47:40,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:47:40,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:47:40,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:47:40,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:47:40,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:47:40,692 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:47:40,725 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:47:40,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:47:40,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:47:40,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:47:40,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:47:40,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:47:40,730 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:47:40,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:47:40,731 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:47:40,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:47:40,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:47:40,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:47:40,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:47:40,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:47:40,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:47:40,735 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:47:40,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:47:40,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:47:40,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:47:40,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:47:40,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:47:40,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:47:40,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:47:40,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:47:40,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:47:40,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:47:40,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:47:40,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:47:40,741 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:47:40,741 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:47:40,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:47:40,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:47:40,742 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_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 962623ba1d780e7ad35b9b6d7f5839750bc2f361556d46080824a3701cf71595 [2021-11-23 13:47:41,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:47:41,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:47:41,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:47:41,124 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:47:41,125 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:47:41,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/systemc/token_ring.12.cil-1.c [2021-11-23 13:47:41,209 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/data/3075b26ec/88d8c811c732494190281f3bc1bf0ba0/FLAGcefd73f17 [2021-11-23 13:47:41,980 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:47:41,981 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/sv-benchmarks/c/systemc/token_ring.12.cil-1.c [2021-11-23 13:47:42,002 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/data/3075b26ec/88d8c811c732494190281f3bc1bf0ba0/FLAGcefd73f17 [2021-11-23 13:47:42,222 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/data/3075b26ec/88d8c811c732494190281f3bc1bf0ba0 [2021-11-23 13:47:42,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:47:42,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:47:42,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:47:42,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:47:42,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:47:42,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:42" (1/1) ... [2021-11-23 13:47:42,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b2f7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:42, skipping insertion in model container [2021-11-23 13:47:42,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:42" (1/1) ... [2021-11-23 13:47:42,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:47:42,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:47:42,573 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/sv-benchmarks/c/systemc/token_ring.12.cil-1.c[671,684] [2021-11-23 13:47:42,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:47:42,873 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:47:42,888 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/sv-benchmarks/c/systemc/token_ring.12.cil-1.c[671,684] [2021-11-23 13:47:42,985 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:47:43,036 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:47:43,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:43 WrapperNode [2021-11-23 13:47:43,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:47:43,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:47:43,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:47:43,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:47:43,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:43" (1/1) ... [2021-11-23 13:47:43,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:43" (1/1) ... [2021-11-23 13:47:43,279 INFO L137 Inliner]: procedures = 52, calls = 68, calls flagged for inlining = 63, calls inlined = 270, statements flattened = 4373 [2021-11-23 13:47:43,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:47:43,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:47:43,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:47:43,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:47:43,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:43" (1/1) ... [2021-11-23 13:47:43,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:43" (1/1) ... [2021-11-23 13:47:43,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:43" (1/1) ... [2021-11-23 13:47:43,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:43" (1/1) ... [2021-11-23 13:47:43,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:43" (1/1) ... [2021-11-23 13:47:43,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:43" (1/1) ... [2021-11-23 13:47:43,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:43" (1/1) ... [2021-11-23 13:47:43,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:47:43,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:47:43,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:47:43,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:47:43,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:43" (1/1) ... [2021-11-23 13:47:43,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:47:43,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:47:43,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:47:43,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88d6be08-d238-4175-80d7-43c59cdc2d24/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:47:43,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:47:43,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:47:43,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:47:43,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:47:43,914 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:47:43,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:47:46,905 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:47:46,943 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:47:46,943 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-23 13:47:46,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:47:46 BoogieIcfgContainer [2021-11-23 13:47:46,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:47:46,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:47:46,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:47:46,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:47:46,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:47:42" (1/3) ... [2021-11-23 13:47:46,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251a83c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:47:46, skipping insertion in model container [2021-11-23 13:47:46,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:43" (2/3) ... [2021-11-23 13:47:46,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251a83c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:47:46, skipping insertion in model container [2021-11-23 13:47:46,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:47:46" (3/3) ... [2021-11-23 13:47:46,967 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.12.cil-1.c [2021-11-23 13:47:46,975 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:47:46,975 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 13:47:47,072 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:47:47,085 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 [2021-11-23 13:47:47,085 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 13:47:47,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 1800 states, 1797 states have (on average 1.5008347245409015) internal successors, (2697), 1799 states have internal predecessors, (2697), 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) [2021-11-23 13:47:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:47,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:47,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:47,182 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:47,189 INFO L85 PathProgramCache]: Analyzing trace with hash 92274157, now seen corresponding path program 1 times [2021-11-23 13:47:47,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:47,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346116936] [2021-11-23 13:47:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:47,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:47,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:47,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346116936] [2021-11-23 13:47:47,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346116936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:47,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:47,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:47,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651778642] [2021-11-23 13:47:47,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:47,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:47:47,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:47,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:47:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:47:47,592 INFO L87 Difference]: Start difference. First operand has 1800 states, 1797 states have (on average 1.5008347245409015) internal successors, (2697), 1799 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:47,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:47,861 INFO L93 Difference]: Finished difference Result 3592 states and 5384 transitions. [2021-11-23 13:47:47,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:47:47,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:47,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:47,905 INFO L225 Difference]: With dead ends: 3592 [2021-11-23 13:47:47,906 INFO L226 Difference]: Without dead ends: 1794 [2021-11-23 13:47:47,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:47:47,922 INFO L933 BasicCegarLoop]: 2661 mSDtfsCounter, 2657 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2657 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:47,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2657 Valid, 2661 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:47:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-11-23 13:47:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1794. [2021-11-23 13:47:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1792 states have (on average 1.4832589285714286) internal successors, (2658), 1793 states have internal predecessors, (2658), 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) [2021-11-23 13:47:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2658 transitions. [2021-11-23 13:47:48,110 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2658 transitions. Word has length 164 [2021-11-23 13:47:48,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:48,111 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 2658 transitions. [2021-11-23 13:47:48,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2658 transitions. [2021-11-23 13:47:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:48,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:48,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:48,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:47:48,118 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:48,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash -575107733, now seen corresponding path program 1 times [2021-11-23 13:47:48,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:48,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272551962] [2021-11-23 13:47:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:48,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:48,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:48,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272551962] [2021-11-23 13:47:48,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272551962] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:48,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:48,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:48,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251777795] [2021-11-23 13:47:48,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:48,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:47:48,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:48,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:47:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:47:48,234 INFO L87 Difference]: Start difference. First operand 1794 states and 2658 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:48,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:48,441 INFO L93 Difference]: Finished difference Result 3574 states and 5293 transitions. [2021-11-23 13:47:48,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:47:48,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:48,457 INFO L225 Difference]: With dead ends: 3574 [2021-11-23 13:47:48,457 INFO L226 Difference]: Without dead ends: 1794 [2021-11-23 13:47:48,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:47:48,463 INFO L933 BasicCegarLoop]: 2656 mSDtfsCounter, 2644 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2644 SdHoareTripleChecker+Valid, 2656 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:48,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2644 Valid, 2656 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:47:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-11-23 13:47:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1794. [2021-11-23 13:47:48,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1792 states have (on average 1.4827008928571428) internal successors, (2657), 1793 states have internal predecessors, (2657), 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) [2021-11-23 13:47:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2657 transitions. [2021-11-23 13:47:48,570 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2657 transitions. Word has length 164 [2021-11-23 13:47:48,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:48,571 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 2657 transitions. [2021-11-23 13:47:48,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2657 transitions. [2021-11-23 13:47:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:48,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:48,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:48,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:47:48,577 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:48,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:48,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2021688599, now seen corresponding path program 1 times [2021-11-23 13:47:48,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:48,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967354129] [2021-11-23 13:47:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:48,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:48,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:48,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967354129] [2021-11-23 13:47:48,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967354129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:48,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:48,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:47:48,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074168346] [2021-11-23 13:47:48,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:48,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:47:48,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:48,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:47:48,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:47:48,722 INFO L87 Difference]: Start difference. First operand 1794 states and 2657 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2021-11-23 13:47:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:48,995 INFO L93 Difference]: Finished difference Result 5107 states and 7542 transitions. [2021-11-23 13:47:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:47:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:48,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:49,022 INFO L225 Difference]: With dead ends: 5107 [2021-11-23 13:47:49,022 INFO L226 Difference]: Without dead ends: 3332 [2021-11-23 13:47:49,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:47:49,036 INFO L933 BasicCegarLoop]: 2651 mSDtfsCounter, 2501 mSDsluCounter, 2385 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2501 SdHoareTripleChecker+Valid, 5036 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:49,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2501 Valid, 5036 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:47:49,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-11-23 13:47:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 3328. [2021-11-23 13:47:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.476247745039086) internal successors, (4910), 3327 states have internal predecessors, (4910), 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) [2021-11-23 13:47:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4910 transitions. [2021-11-23 13:47:49,263 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4910 transitions. Word has length 164 [2021-11-23 13:47:49,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:49,263 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4910 transitions. [2021-11-23 13:47:49,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2021-11-23 13:47:49,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4910 transitions. [2021-11-23 13:47:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:49,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:49,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:49,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:47:49,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:49,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1373746473, now seen corresponding path program 1 times [2021-11-23 13:47:49,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:49,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284204634] [2021-11-23 13:47:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:49,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:49,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:49,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284204634] [2021-11-23 13:47:49,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284204634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:49,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:49,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:49,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498409246] [2021-11-23 13:47:49,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:49,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:47:49,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:49,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:47:49,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:47:49,455 INFO L87 Difference]: Start difference. First operand 3328 states and 4910 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:49,920 INFO L93 Difference]: Finished difference Result 8171 states and 12039 transitions. [2021-11-23 13:47:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:47:49,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:49,956 INFO L225 Difference]: With dead ends: 8171 [2021-11-23 13:47:49,956 INFO L226 Difference]: Without dead ends: 4864 [2021-11-23 13:47:49,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:47:49,976 INFO L933 BasicCegarLoop]: 2752 mSDtfsCounter, 7233 mSDsluCounter, 2426 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7233 SdHoareTripleChecker+Valid, 5178 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:49,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7233 Valid, 5178 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:47:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4864 states. [2021-11-23 13:47:50,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4864 to 3328. [2021-11-23 13:47:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4753457606734817) internal successors, (4907), 3327 states have internal predecessors, (4907), 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) [2021-11-23 13:47:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4907 transitions. [2021-11-23 13:47:50,205 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4907 transitions. Word has length 164 [2021-11-23 13:47:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:50,206 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4907 transitions. [2021-11-23 13:47:50,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4907 transitions. [2021-11-23 13:47:50,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:50,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:50,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:50,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:47:50,211 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:50,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:50,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1712034023, now seen corresponding path program 1 times [2021-11-23 13:47:50,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:50,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568344621] [2021-11-23 13:47:50,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:50,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:50,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:50,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568344621] [2021-11-23 13:47:50,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568344621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:50,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:50,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:50,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762953439] [2021-11-23 13:47:50,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:50,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:47:50,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:50,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:47:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:47:50,329 INFO L87 Difference]: Start difference. First operand 3328 states and 4907 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:50,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:50,776 INFO L93 Difference]: Finished difference Result 8169 states and 12029 transitions. [2021-11-23 13:47:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:47:50,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:50,813 INFO L225 Difference]: With dead ends: 8169 [2021-11-23 13:47:50,813 INFO L226 Difference]: Without dead ends: 4863 [2021-11-23 13:47:50,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:47:50,822 INFO L933 BasicCegarLoop]: 4885 mSDtfsCounter, 5088 mSDsluCounter, 2423 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5088 SdHoareTripleChecker+Valid, 7308 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:50,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5088 Valid, 7308 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:47:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-11-23 13:47:51,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 3328. [2021-11-23 13:47:51,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4744437763078773) internal successors, (4904), 3327 states have internal predecessors, (4904), 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) [2021-11-23 13:47:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4904 transitions. [2021-11-23 13:47:51,113 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4904 transitions. Word has length 164 [2021-11-23 13:47:51,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:51,114 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4904 transitions. [2021-11-23 13:47:51,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4904 transitions. [2021-11-23 13:47:51,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:51,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:51,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:51,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:47:51,125 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:51,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:51,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2138588521, now seen corresponding path program 1 times [2021-11-23 13:47:51,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:51,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708882072] [2021-11-23 13:47:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:51,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:51,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:51,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708882072] [2021-11-23 13:47:51,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708882072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:51,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:51,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:51,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9702094] [2021-11-23 13:47:51,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:51,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:47:51,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:51,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:47:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:47:51,231 INFO L87 Difference]: Start difference. First operand 3328 states and 4904 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:51,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:51,751 INFO L93 Difference]: Finished difference Result 8167 states and 12019 transitions. [2021-11-23 13:47:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:47:51,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:51,787 INFO L225 Difference]: With dead ends: 8167 [2021-11-23 13:47:51,788 INFO L226 Difference]: Without dead ends: 4862 [2021-11-23 13:47:51,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:47:51,798 INFO L933 BasicCegarLoop]: 4880 mSDtfsCounter, 5083 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5083 SdHoareTripleChecker+Valid, 7300 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:51,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5083 Valid, 7300 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:47:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-11-23 13:47:52,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 3328. [2021-11-23 13:47:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.473541791942273) internal successors, (4901), 3327 states have internal predecessors, (4901), 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) [2021-11-23 13:47:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4901 transitions. [2021-11-23 13:47:52,127 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4901 transitions. Word has length 164 [2021-11-23 13:47:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:52,128 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4901 transitions. [2021-11-23 13:47:52,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:52,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4901 transitions. [2021-11-23 13:47:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:52,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:52,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:52,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:47:52,132 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:52,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:52,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1598159015, now seen corresponding path program 1 times [2021-11-23 13:47:52,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:52,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83586730] [2021-11-23 13:47:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:52,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:52,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:52,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83586730] [2021-11-23 13:47:52,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83586730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:52,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:52,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:52,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432861349] [2021-11-23 13:47:52,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:52,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:47:52,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:52,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:47:52,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:47:52,211 INFO L87 Difference]: Start difference. First operand 3328 states and 4901 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:52,773 INFO L93 Difference]: Finished difference Result 8165 states and 12009 transitions. [2021-11-23 13:47:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:47:52,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:52,810 INFO L225 Difference]: With dead ends: 8165 [2021-11-23 13:47:52,810 INFO L226 Difference]: Without dead ends: 4861 [2021-11-23 13:47:52,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:47:52,818 INFO L933 BasicCegarLoop]: 4875 mSDtfsCounter, 5078 mSDsluCounter, 2417 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5078 SdHoareTripleChecker+Valid, 7292 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:52,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5078 Valid, 7292 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:47:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-11-23 13:47:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 3328. [2021-11-23 13:47:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4726398075766687) internal successors, (4898), 3327 states have internal predecessors, (4898), 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) [2021-11-23 13:47:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4898 transitions. [2021-11-23 13:47:53,094 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4898 transitions. Word has length 164 [2021-11-23 13:47:53,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:53,095 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4898 transitions. [2021-11-23 13:47:53,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4898 transitions. [2021-11-23 13:47:53,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:53,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:53,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:53,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:47:53,099 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:53,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:53,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1442178473, now seen corresponding path program 1 times [2021-11-23 13:47:53,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:53,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392223311] [2021-11-23 13:47:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:53,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:53,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:53,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392223311] [2021-11-23 13:47:53,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392223311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:53,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:53,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:53,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690163989] [2021-11-23 13:47:53,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:53,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:47:53,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:53,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:47:53,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:47:53,158 INFO L87 Difference]: Start difference. First operand 3328 states and 4898 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:53,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:53,684 INFO L93 Difference]: Finished difference Result 8163 states and 11999 transitions. [2021-11-23 13:47:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:47:53,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:53,730 INFO L225 Difference]: With dead ends: 8163 [2021-11-23 13:47:53,737 INFO L226 Difference]: Without dead ends: 4860 [2021-11-23 13:47:53,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:47:53,747 INFO L933 BasicCegarLoop]: 4870 mSDtfsCounter, 5073 mSDsluCounter, 2414 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5073 SdHoareTripleChecker+Valid, 7284 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:53,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5073 Valid, 7284 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:47:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4860 states. [2021-11-23 13:47:54,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4860 to 3328. [2021-11-23 13:47:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4717378232110643) internal successors, (4895), 3327 states have internal predecessors, (4895), 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) [2021-11-23 13:47:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4895 transitions. [2021-11-23 13:47:54,120 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4895 transitions. Word has length 164 [2021-11-23 13:47:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:54,126 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4895 transitions. [2021-11-23 13:47:54,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4895 transitions. [2021-11-23 13:47:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:54,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:54,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:54,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:47:54,131 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:54,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1852788839, now seen corresponding path program 1 times [2021-11-23 13:47:54,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:54,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961672336] [2021-11-23 13:47:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:54,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:54,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:54,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961672336] [2021-11-23 13:47:54,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961672336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:54,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:54,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:54,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536086250] [2021-11-23 13:47:54,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:54,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:47:54,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:47:54,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:47:54,219 INFO L87 Difference]: Start difference. First operand 3328 states and 4895 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:54,803 INFO L93 Difference]: Finished difference Result 8161 states and 11989 transitions. [2021-11-23 13:47:54,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:47:54,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:54,830 INFO L225 Difference]: With dead ends: 8161 [2021-11-23 13:47:54,830 INFO L226 Difference]: Without dead ends: 4859 [2021-11-23 13:47:54,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:47:54,842 INFO L933 BasicCegarLoop]: 4865 mSDtfsCounter, 5068 mSDsluCounter, 2411 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5068 SdHoareTripleChecker+Valid, 7276 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:54,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5068 Valid, 7276 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:47:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4859 states. [2021-11-23 13:47:55,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4859 to 3328. [2021-11-23 13:47:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.47083583884546) internal successors, (4892), 3327 states have internal predecessors, (4892), 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) [2021-11-23 13:47:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4892 transitions. [2021-11-23 13:47:55,172 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4892 transitions. Word has length 164 [2021-11-23 13:47:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:55,172 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4892 transitions. [2021-11-23 13:47:55,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4892 transitions. [2021-11-23 13:47:55,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:55,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:55,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:55,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 13:47:55,177 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:55,178 INFO L85 PathProgramCache]: Analyzing trace with hash 64919017, now seen corresponding path program 1 times [2021-11-23 13:47:55,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:55,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350773952] [2021-11-23 13:47:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:55,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:55,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:55,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350773952] [2021-11-23 13:47:55,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350773952] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:55,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:55,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:55,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753139645] [2021-11-23 13:47:55,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:55,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:47:55,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:47:55,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:47:55,244 INFO L87 Difference]: Start difference. First operand 3328 states and 4892 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:55,714 INFO L93 Difference]: Finished difference Result 8159 states and 11979 transitions. [2021-11-23 13:47:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:47:55,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:55,730 INFO L225 Difference]: With dead ends: 8159 [2021-11-23 13:47:55,730 INFO L226 Difference]: Without dead ends: 4858 [2021-11-23 13:47:55,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:47:55,739 INFO L933 BasicCegarLoop]: 4860 mSDtfsCounter, 5063 mSDsluCounter, 2408 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5063 SdHoareTripleChecker+Valid, 7268 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:55,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5063 Valid, 7268 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:47:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-11-23 13:47:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 3328. [2021-11-23 13:47:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4699338544798557) internal successors, (4889), 3327 states have internal predecessors, (4889), 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) [2021-11-23 13:47:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4889 transitions. [2021-11-23 13:47:56,065 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4889 transitions. Word has length 164 [2021-11-23 13:47:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:56,066 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4889 transitions. [2021-11-23 13:47:56,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4889 transitions. [2021-11-23 13:47:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:56,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:56,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:56,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 13:47:56,071 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2070964185, now seen corresponding path program 1 times [2021-11-23 13:47:56,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:56,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714574238] [2021-11-23 13:47:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:56,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:56,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:56,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714574238] [2021-11-23 13:47:56,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714574238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:56,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:56,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:56,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356088608] [2021-11-23 13:47:56,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:56,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:47:56,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:47:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:47:56,130 INFO L87 Difference]: Start difference. First operand 3328 states and 4889 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:56,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:56,619 INFO L93 Difference]: Finished difference Result 8155 states and 11965 transitions. [2021-11-23 13:47:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:47:56,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:56,635 INFO L225 Difference]: With dead ends: 8155 [2021-11-23 13:47:56,635 INFO L226 Difference]: Without dead ends: 4856 [2021-11-23 13:47:56,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:47:56,644 INFO L933 BasicCegarLoop]: 2722 mSDtfsCounter, 7190 mSDsluCounter, 2403 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7190 SdHoareTripleChecker+Valid, 5125 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:56,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7190 Valid, 5125 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:47:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2021-11-23 13:47:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 3328. [2021-11-23 13:47:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4690318701142513) internal successors, (4886), 3327 states have internal predecessors, (4886), 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) [2021-11-23 13:47:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4886 transitions. [2021-11-23 13:47:56,987 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4886 transitions. Word has length 164 [2021-11-23 13:47:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:56,987 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4886 transitions. [2021-11-23 13:47:56,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4886 transitions. [2021-11-23 13:47:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:56,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:56,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:56,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 13:47:56,991 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:56,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1653075483, now seen corresponding path program 1 times [2021-11-23 13:47:56,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:56,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696454225] [2021-11-23 13:47:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:56,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:57,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:57,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696454225] [2021-11-23 13:47:57,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696454225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:57,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:57,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:57,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328233039] [2021-11-23 13:47:57,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:57,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:47:57,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:47:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:47:57,046 INFO L87 Difference]: Start difference. First operand 3328 states and 4886 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:57,578 INFO L93 Difference]: Finished difference Result 8153 states and 11955 transitions. [2021-11-23 13:47:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:47:57,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:57,594 INFO L225 Difference]: With dead ends: 8153 [2021-11-23 13:47:57,595 INFO L226 Difference]: Without dead ends: 4855 [2021-11-23 13:47:57,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:47:57,605 INFO L933 BasicCegarLoop]: 4848 mSDtfsCounter, 5052 mSDsluCounter, 2400 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5052 SdHoareTripleChecker+Valid, 7248 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:57,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5052 Valid, 7248 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:47:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2021-11-23 13:47:57,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 3328. [2021-11-23 13:47:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4681298857486471) internal successors, (4883), 3327 states have internal predecessors, (4883), 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) [2021-11-23 13:47:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4883 transitions. [2021-11-23 13:47:58,018 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4883 transitions. Word has length 164 [2021-11-23 13:47:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:58,020 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4883 transitions. [2021-11-23 13:47:58,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4883 transitions. [2021-11-23 13:47:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:58,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:58,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:58,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 13:47:58,026 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash -254121881, now seen corresponding path program 1 times [2021-11-23 13:47:58,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:58,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584579942] [2021-11-23 13:47:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:58,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:58,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:58,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584579942] [2021-11-23 13:47:58,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584579942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:58,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:58,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:58,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032956836] [2021-11-23 13:47:58,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:58,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:47:58,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:58,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:47:58,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:47:58,097 INFO L87 Difference]: Start difference. First operand 3328 states and 4883 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:58,763 INFO L93 Difference]: Finished difference Result 8151 states and 11945 transitions. [2021-11-23 13:47:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:47:58,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:47:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:58,779 INFO L225 Difference]: With dead ends: 8151 [2021-11-23 13:47:58,779 INFO L226 Difference]: Without dead ends: 4854 [2021-11-23 13:47:58,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:47:58,789 INFO L933 BasicCegarLoop]: 4843 mSDtfsCounter, 5047 mSDsluCounter, 2397 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5047 SdHoareTripleChecker+Valid, 7240 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:58,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5047 Valid, 7240 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:47:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4854 states. [2021-11-23 13:47:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4854 to 3328. [2021-11-23 13:47:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4672279013830427) internal successors, (4880), 3327 states have internal predecessors, (4880), 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) [2021-11-23 13:47:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4880 transitions. [2021-11-23 13:47:59,202 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4880 transitions. Word has length 164 [2021-11-23 13:47:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:59,202 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4880 transitions. [2021-11-23 13:47:59,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:47:59,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4880 transitions. [2021-11-23 13:47:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:47:59,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:59,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:59,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 13:47:59,207 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:59,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:59,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1871562331, now seen corresponding path program 1 times [2021-11-23 13:47:59,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:59,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795713018] [2021-11-23 13:47:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:59,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:47:59,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:59,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795713018] [2021-11-23 13:47:59,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795713018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:47:59,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:47:59,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:47:59,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894999326] [2021-11-23 13:47:59,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:47:59,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:47:59,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:59,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:47:59,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:47:59,311 INFO L87 Difference]: Start difference. First operand 3328 states and 4880 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:00,014 INFO L93 Difference]: Finished difference Result 8057 states and 11804 transitions. [2021-11-23 13:48:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:00,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:48:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:00,028 INFO L225 Difference]: With dead ends: 8057 [2021-11-23 13:48:00,028 INFO L226 Difference]: Without dead ends: 4761 [2021-11-23 13:48:00,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:00,038 INFO L933 BasicCegarLoop]: 4649 mSDtfsCounter, 4908 mSDsluCounter, 2362 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4908 SdHoareTripleChecker+Valid, 7011 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:00,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4908 Valid, 7011 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:00,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-11-23 13:48:00,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 3328. [2021-11-23 13:48:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4663259170174383) internal successors, (4877), 3327 states have internal predecessors, (4877), 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) [2021-11-23 13:48:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4877 transitions. [2021-11-23 13:48:00,369 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4877 transitions. Word has length 164 [2021-11-23 13:48:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:00,369 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4877 transitions. [2021-11-23 13:48:00,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4877 transitions. [2021-11-23 13:48:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:48:00,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:00,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:00,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 13:48:00,374 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:00,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:00,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1508095833, now seen corresponding path program 1 times [2021-11-23 13:48:00,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:00,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154028319] [2021-11-23 13:48:00,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:00,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:00,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:00,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154028319] [2021-11-23 13:48:00,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154028319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:00,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:00,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:00,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587083809] [2021-11-23 13:48:00,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:00,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:00,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:00,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:00,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:00,435 INFO L87 Difference]: Start difference. First operand 3328 states and 4877 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:01,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:01,108 INFO L93 Difference]: Finished difference Result 8054 states and 11793 transitions. [2021-11-23 13:48:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:01,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:48:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:01,123 INFO L225 Difference]: With dead ends: 8054 [2021-11-23 13:48:01,124 INFO L226 Difference]: Without dead ends: 4759 [2021-11-23 13:48:01,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:01,135 INFO L933 BasicCegarLoop]: 4643 mSDtfsCounter, 4902 mSDsluCounter, 2359 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4902 SdHoareTripleChecker+Valid, 7002 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:01,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4902 Valid, 7002 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2021-11-23 13:48:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 3328. [2021-11-23 13:48:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4654239326518341) internal successors, (4874), 3327 states have internal predecessors, (4874), 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) [2021-11-23 13:48:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4874 transitions. [2021-11-23 13:48:01,560 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4874 transitions. Word has length 164 [2021-11-23 13:48:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:01,561 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4874 transitions. [2021-11-23 13:48:01,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4874 transitions. [2021-11-23 13:48:01,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:48:01,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:01,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:01,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 13:48:01,565 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:01,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1219276443, now seen corresponding path program 1 times [2021-11-23 13:48:01,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:01,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238915468] [2021-11-23 13:48:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:01,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:01,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:01,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238915468] [2021-11-23 13:48:01,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238915468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:01,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:01,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:48:01,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076487261] [2021-11-23 13:48:01,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:01,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:48:01,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:01,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:48:01,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:01,625 INFO L87 Difference]: Start difference. First operand 3328 states and 4874 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2021-11-23 13:48:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:02,086 INFO L93 Difference]: Finished difference Result 6622 states and 9700 transitions. [2021-11-23 13:48:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:48:02,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 164 [2021-11-23 13:48:02,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:02,097 INFO L225 Difference]: With dead ends: 6622 [2021-11-23 13:48:02,097 INFO L226 Difference]: Without dead ends: 3328 [2021-11-23 13:48:02,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:02,104 INFO L933 BasicCegarLoop]: 2591 mSDtfsCounter, 2446 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2446 SdHoareTripleChecker+Valid, 2719 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:02,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2446 Valid, 2719 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:48:02,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-11-23 13:48:02,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 3328. [2021-11-23 13:48:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4546001202645822) internal successors, (4838), 3327 states have internal predecessors, (4838), 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) [2021-11-23 13:48:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4838 transitions. [2021-11-23 13:48:02,491 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4838 transitions. Word has length 164 [2021-11-23 13:48:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:02,491 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4838 transitions. [2021-11-23 13:48:02,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2021-11-23 13:48:02,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4838 transitions. [2021-11-23 13:48:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:48:02,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:02,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:02,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 13:48:02,494 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:02,495 INFO L85 PathProgramCache]: Analyzing trace with hash -331047642, now seen corresponding path program 1 times [2021-11-23 13:48:02,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:02,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697376968] [2021-11-23 13:48:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:02,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:02,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697376968] [2021-11-23 13:48:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697376968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:02,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:02,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:02,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098778627] [2021-11-23 13:48:02,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:02,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:02,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:02,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:02,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:02,561 INFO L87 Difference]: Start difference. First operand 3328 states and 4838 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:03,341 INFO L93 Difference]: Finished difference Result 8051 states and 11695 transitions. [2021-11-23 13:48:03,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:03,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:48:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:03,355 INFO L225 Difference]: With dead ends: 8051 [2021-11-23 13:48:03,355 INFO L226 Difference]: Without dead ends: 4758 [2021-11-23 13:48:03,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:03,362 INFO L933 BasicCegarLoop]: 4603 mSDtfsCounter, 4860 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4860 SdHoareTripleChecker+Valid, 6940 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:03,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4860 Valid, 6940 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4758 states. [2021-11-23 13:48:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4758 to 3328. [2021-11-23 13:48:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4536981358989778) internal successors, (4835), 3327 states have internal predecessors, (4835), 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) [2021-11-23 13:48:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4835 transitions. [2021-11-23 13:48:03,680 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4835 transitions. Word has length 164 [2021-11-23 13:48:03,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:03,680 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4835 transitions. [2021-11-23 13:48:03,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4835 transitions. [2021-11-23 13:48:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:48:03,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:03,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:03,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 13:48:03,684 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:03,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:03,685 INFO L85 PathProgramCache]: Analyzing trace with hash 344112484, now seen corresponding path program 1 times [2021-11-23 13:48:03,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:03,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070876220] [2021-11-23 13:48:03,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:03,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:03,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:03,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070876220] [2021-11-23 13:48:03,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070876220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:03,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:03,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:03,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21213301] [2021-11-23 13:48:03,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:03,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:03,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:03,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:03,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:03,739 INFO L87 Difference]: Start difference. First operand 3328 states and 4835 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:04,420 INFO L93 Difference]: Finished difference Result 8047 states and 11681 transitions. [2021-11-23 13:48:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:04,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:48:04,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:04,433 INFO L225 Difference]: With dead ends: 8047 [2021-11-23 13:48:04,434 INFO L226 Difference]: Without dead ends: 4756 [2021-11-23 13:48:04,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:04,441 INFO L933 BasicCegarLoop]: 2642 mSDtfsCounter, 6835 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6835 SdHoareTripleChecker+Valid, 4974 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:04,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6835 Valid, 4974 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4756 states. [2021-11-23 13:48:04,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4756 to 3328. [2021-11-23 13:48:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4527961515333734) internal successors, (4832), 3327 states have internal predecessors, (4832), 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) [2021-11-23 13:48:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4832 transitions. [2021-11-23 13:48:04,846 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4832 transitions. Word has length 164 [2021-11-23 13:48:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:04,847 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4832 transitions. [2021-11-23 13:48:04,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:04,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4832 transitions. [2021-11-23 13:48:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:48:04,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:04,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:04,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 13:48:04,851 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:04,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:04,852 INFO L85 PathProgramCache]: Analyzing trace with hash -240659166, now seen corresponding path program 1 times [2021-11-23 13:48:04,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:04,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840141243] [2021-11-23 13:48:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:04,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:04,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:04,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840141243] [2021-11-23 13:48:04,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840141243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:04,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:04,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:04,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473175923] [2021-11-23 13:48:04,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:04,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:04,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:04,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:04,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:04,921 INFO L87 Difference]: Start difference. First operand 3328 states and 4832 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:05,861 INFO L93 Difference]: Finished difference Result 8045 states and 11671 transitions. [2021-11-23 13:48:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:05,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:48:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:05,880 INFO L225 Difference]: With dead ends: 8045 [2021-11-23 13:48:05,885 INFO L226 Difference]: Without dead ends: 4755 [2021-11-23 13:48:05,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:05,893 INFO L933 BasicCegarLoop]: 4591 mSDtfsCounter, 4849 mSDsluCounter, 2329 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4849 SdHoareTripleChecker+Valid, 6920 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:05,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4849 Valid, 6920 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:48:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2021-11-23 13:48:06,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 3328. [2021-11-23 13:48:06,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4518941671677692) internal successors, (4829), 3327 states have internal predecessors, (4829), 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) [2021-11-23 13:48:06,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4829 transitions. [2021-11-23 13:48:06,357 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4829 transitions. Word has length 164 [2021-11-23 13:48:06,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:06,358 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4829 transitions. [2021-11-23 13:48:06,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:06,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4829 transitions. [2021-11-23 13:48:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:48:06,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:06,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:06,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 13:48:06,361 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:06,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash -675164764, now seen corresponding path program 1 times [2021-11-23 13:48:06,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:06,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804272583] [2021-11-23 13:48:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:06,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:06,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:06,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804272583] [2021-11-23 13:48:06,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804272583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:06,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:06,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:06,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865049712] [2021-11-23 13:48:06,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:06,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:06,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:06,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:06,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:06,432 INFO L87 Difference]: Start difference. First operand 3328 states and 4829 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:07,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:07,133 INFO L93 Difference]: Finished difference Result 8043 states and 11661 transitions. [2021-11-23 13:48:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:07,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:48:07,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:07,148 INFO L225 Difference]: With dead ends: 8043 [2021-11-23 13:48:07,148 INFO L226 Difference]: Without dead ends: 4754 [2021-11-23 13:48:07,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:07,156 INFO L933 BasicCegarLoop]: 4586 mSDtfsCounter, 4844 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4844 SdHoareTripleChecker+Valid, 6912 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:07,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4844 Valid, 6912 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:07,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4754 states. [2021-11-23 13:48:07,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4754 to 3328. [2021-11-23 13:48:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4509921828021648) internal successors, (4826), 3327 states have internal predecessors, (4826), 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) [2021-11-23 13:48:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4826 transitions. [2021-11-23 13:48:07,567 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4826 transitions. Word has length 164 [2021-11-23 13:48:07,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:07,567 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4826 transitions. [2021-11-23 13:48:07,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:07,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4826 transitions. [2021-11-23 13:48:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:48:07,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:07,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:07,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 13:48:07,571 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:07,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:07,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1104823070, now seen corresponding path program 1 times [2021-11-23 13:48:07,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:07,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119805471] [2021-11-23 13:48:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:07,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:07,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:07,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119805471] [2021-11-23 13:48:07,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119805471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:07,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:07,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:07,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279573556] [2021-11-23 13:48:07,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:07,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:07,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:07,634 INFO L87 Difference]: Start difference. First operand 3328 states and 4826 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:08,357 INFO L93 Difference]: Finished difference Result 8041 states and 11651 transitions. [2021-11-23 13:48:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:08,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:48:08,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:08,372 INFO L225 Difference]: With dead ends: 8041 [2021-11-23 13:48:08,372 INFO L226 Difference]: Without dead ends: 4753 [2021-11-23 13:48:08,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:08,379 INFO L933 BasicCegarLoop]: 4581 mSDtfsCounter, 4839 mSDsluCounter, 2323 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4839 SdHoareTripleChecker+Valid, 6904 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:08,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4839 Valid, 6904 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:08,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4753 states. [2021-11-23 13:48:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4753 to 3328. [2021-11-23 13:48:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4500901984365604) internal successors, (4823), 3327 states have internal predecessors, (4823), 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) [2021-11-23 13:48:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4823 transitions. [2021-11-23 13:48:08,754 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4823 transitions. Word has length 164 [2021-11-23 13:48:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:08,755 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4823 transitions. [2021-11-23 13:48:08,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4823 transitions. [2021-11-23 13:48:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:48:08,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:08,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:08,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 13:48:08,758 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:08,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1811419676, now seen corresponding path program 1 times [2021-11-23 13:48:08,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:08,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639157926] [2021-11-23 13:48:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:08,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:08,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:08,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639157926] [2021-11-23 13:48:08,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639157926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:08,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:08,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:08,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596038727] [2021-11-23 13:48:08,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:08,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:08,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:08,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:08,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:08,825 INFO L87 Difference]: Start difference. First operand 3328 states and 4823 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:09,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:09,547 INFO L93 Difference]: Finished difference Result 8039 states and 11641 transitions. [2021-11-23 13:48:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:48:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:09,557 INFO L225 Difference]: With dead ends: 8039 [2021-11-23 13:48:09,558 INFO L226 Difference]: Without dead ends: 4752 [2021-11-23 13:48:09,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:09,563 INFO L933 BasicCegarLoop]: 4576 mSDtfsCounter, 4834 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4834 SdHoareTripleChecker+Valid, 6896 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:09,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4834 Valid, 6896 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:09,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4752 states. [2021-11-23 13:48:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4752 to 3328. [2021-11-23 13:48:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.449188214070956) internal successors, (4820), 3327 states have internal predecessors, (4820), 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) [2021-11-23 13:48:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4820 transitions. [2021-11-23 13:48:09,978 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4820 transitions. Word has length 164 [2021-11-23 13:48:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:09,979 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4820 transitions. [2021-11-23 13:48:09,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4820 transitions. [2021-11-23 13:48:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:48:09,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:09,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:09,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 13:48:09,982 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:09,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:09,983 INFO L85 PathProgramCache]: Analyzing trace with hash -864381790, now seen corresponding path program 1 times [2021-11-23 13:48:09,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:09,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27286631] [2021-11-23 13:48:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:09,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:10,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:10,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27286631] [2021-11-23 13:48:10,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27286631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:10,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:10,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:10,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544708310] [2021-11-23 13:48:10,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:10,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:10,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:10,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:10,035 INFO L87 Difference]: Start difference. First operand 3328 states and 4820 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:10,668 INFO L93 Difference]: Finished difference Result 8037 states and 11631 transitions. [2021-11-23 13:48:10,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:10,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:48:10,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:10,676 INFO L225 Difference]: With dead ends: 8037 [2021-11-23 13:48:10,676 INFO L226 Difference]: Without dead ends: 4751 [2021-11-23 13:48:10,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:10,681 INFO L933 BasicCegarLoop]: 4571 mSDtfsCounter, 4829 mSDsluCounter, 2317 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4829 SdHoareTripleChecker+Valid, 6888 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:10,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4829 Valid, 6888 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-11-23 13:48:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3328. [2021-11-23 13:48:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4482862297053518) internal successors, (4817), 3327 states have internal predecessors, (4817), 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) [2021-11-23 13:48:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4817 transitions. [2021-11-23 13:48:10,967 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4817 transitions. Word has length 164 [2021-11-23 13:48:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:10,968 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4817 transitions. [2021-11-23 13:48:10,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4817 transitions. [2021-11-23 13:48:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:48:10,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:10,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:10,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 13:48:10,970 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2548188, now seen corresponding path program 1 times [2021-11-23 13:48:10,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:10,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968929869] [2021-11-23 13:48:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:10,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:11,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:11,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968929869] [2021-11-23 13:48:11,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968929869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:11,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:11,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:11,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179541983] [2021-11-23 13:48:11,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:11,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:11,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:11,022 INFO L87 Difference]: Start difference. First operand 3328 states and 4817 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:11,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:11,706 INFO L93 Difference]: Finished difference Result 8035 states and 11621 transitions. [2021-11-23 13:48:11,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:11,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 164 [2021-11-23 13:48:11,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:11,713 INFO L225 Difference]: With dead ends: 8035 [2021-11-23 13:48:11,714 INFO L226 Difference]: Without dead ends: 4750 [2021-11-23 13:48:11,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:11,719 INFO L933 BasicCegarLoop]: 4566 mSDtfsCounter, 4824 mSDsluCounter, 2314 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4824 SdHoareTripleChecker+Valid, 6880 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:11,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4824 Valid, 6880 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4750 states. [2021-11-23 13:48:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4750 to 3328. [2021-11-23 13:48:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3326 states have (on average 1.4473842453397474) internal successors, (4814), 3327 states have internal predecessors, (4814), 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) [2021-11-23 13:48:11,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4814 transitions. [2021-11-23 13:48:11,996 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4814 transitions. Word has length 164 [2021-11-23 13:48:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:11,996 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4814 transitions. [2021-11-23 13:48:11,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2021-11-23 13:48:11,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4814 transitions. [2021-11-23 13:48:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 13:48:11,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:11,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:11,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 13:48:11,998 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:11,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:11,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2052957086, now seen corresponding path program 1 times [2021-11-23 13:48:11,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:11,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795329157] [2021-11-23 13:48:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:12,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:48:12,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:12,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795329157] [2021-11-23 13:48:12,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795329157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:12,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:12,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:48:12,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054176150] [2021-11-23 13:48:12,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:12,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:48:12,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:12,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:48:12,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:12,047 INFO L87 Difference]: Start difference. First operand 3328 states and 4814 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2021-11-23 13:48:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:12,655 INFO L93 Difference]: Finished difference Result 9725 states and 14048 transitions. [2021-11-23 13:48:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:48:12,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 164 [2021-11-23 13:48:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:12,665 INFO L225 Difference]: With dead ends: 9725 [2021-11-23 13:48:12,666 INFO L226 Difference]: Without dead ends: 6443 [2021-11-23 13:48:12,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:12,671 INFO L933 BasicCegarLoop]: 2575 mSDtfsCounter, 2483 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2483 SdHoareTripleChecker+Valid, 4895 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:12,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2483 Valid, 4895 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6443 states. [2021-11-23 13:48:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6443 to 6263. [2021-11-23 13:48:13,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6263 states, 6261 states have (on average 1.4393866794441783) internal successors, (9012), 6262 states have internal predecessors, (9012), 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) [2021-11-23 13:48:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6263 states to 6263 states and 9012 transitions. [2021-11-23 13:48:13,359 INFO L78 Accepts]: Start accepts. Automaton has 6263 states and 9012 transitions. Word has length 164 [2021-11-23 13:48:13,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:13,359 INFO L470 AbstractCegarLoop]: Abstraction has 6263 states and 9012 transitions. [2021-11-23 13:48:13,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2021-11-23 13:48:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 6263 states and 9012 transitions. [2021-11-23 13:48:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 13:48:13,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:13,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:13,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 13:48:13,368 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:13,369 INFO L85 PathProgramCache]: Analyzing trace with hash 65988222, now seen corresponding path program 1 times [2021-11-23 13:48:13,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:13,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907098798] [2021-11-23 13:48:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:13,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:13,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907098798] [2021-11-23 13:48:13,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907098798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:13,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:13,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:48:13,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374237233] [2021-11-23 13:48:13,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:13,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:48:13,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:13,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:48:13,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:13,464 INFO L87 Difference]: Start difference. First operand 6263 states and 9012 transitions. Second operand has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2021-11-23 13:48:15,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:15,301 INFO L93 Difference]: Finished difference Result 18553 states and 26708 transitions. [2021-11-23 13:48:15,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:48:15,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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 267 [2021-11-23 13:48:15,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:15,319 INFO L225 Difference]: With dead ends: 18553 [2021-11-23 13:48:15,320 INFO L226 Difference]: Without dead ends: 12340 [2021-11-23 13:48:15,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:48:15,331 INFO L933 BasicCegarLoop]: 2543 mSDtfsCounter, 9429 mSDsluCounter, 11229 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9429 SdHoareTripleChecker+Valid, 13772 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:15,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9429 Valid, 13772 Invalid, 277 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [75 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:48:15,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12340 states. [2021-11-23 13:48:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12340 to 6350. [2021-11-23 13:48:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6350 states, 6348 states have (on average 1.4289540012602395) internal successors, (9071), 6349 states have internal predecessors, (9071), 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) [2021-11-23 13:48:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6350 states to 6350 states and 9071 transitions. [2021-11-23 13:48:16,019 INFO L78 Accepts]: Start accepts. Automaton has 6350 states and 9071 transitions. Word has length 267 [2021-11-23 13:48:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:16,019 INFO L470 AbstractCegarLoop]: Abstraction has 6350 states and 9071 transitions. [2021-11-23 13:48:16,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2021-11-23 13:48:16,020 INFO L276 IsEmpty]: Start isEmpty. Operand 6350 states and 9071 transitions. [2021-11-23 13:48:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 13:48:16,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:16,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:16,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 13:48:16,028 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:16,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:16,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1144504966, now seen corresponding path program 1 times [2021-11-23 13:48:16,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:16,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854819423] [2021-11-23 13:48:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:16,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:16,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:16,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854819423] [2021-11-23 13:48:16,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854819423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:16,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:16,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:48:16,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979762555] [2021-11-23 13:48:16,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:16,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:48:16,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:16,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:48:16,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:16,107 INFO L87 Difference]: Start difference. First operand 6350 states and 9071 transitions. Second operand has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2021-11-23 13:48:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:17,276 INFO L93 Difference]: Finished difference Result 15260 states and 21748 transitions. [2021-11-23 13:48:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:48:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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 267 [2021-11-23 13:48:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:17,289 INFO L225 Difference]: With dead ends: 15260 [2021-11-23 13:48:17,289 INFO L226 Difference]: Without dead ends: 8974 [2021-11-23 13:48:17,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:48:17,297 INFO L933 BasicCegarLoop]: 2528 mSDtfsCounter, 7231 mSDsluCounter, 2234 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7231 SdHoareTripleChecker+Valid, 4762 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:17,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7231 Valid, 4762 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:48:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2021-11-23 13:48:17,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 6362. [2021-11-23 13:48:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6362 states, 6360 states have (on average 1.419811320754717) internal successors, (9030), 6361 states have internal predecessors, (9030), 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) [2021-11-23 13:48:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6362 states to 6362 states and 9030 transitions. [2021-11-23 13:48:18,003 INFO L78 Accepts]: Start accepts. Automaton has 6362 states and 9030 transitions. Word has length 267 [2021-11-23 13:48:18,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:18,004 INFO L470 AbstractCegarLoop]: Abstraction has 6362 states and 9030 transitions. [2021-11-23 13:48:18,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2021-11-23 13:48:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6362 states and 9030 transitions. [2021-11-23 13:48:18,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 13:48:18,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:18,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:18,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 13:48:18,013 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:18,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1301229174, now seen corresponding path program 1 times [2021-11-23 13:48:18,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:18,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730380335] [2021-11-23 13:48:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:18,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:18,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:18,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730380335] [2021-11-23 13:48:18,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730380335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:18,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:18,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:48:18,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408651955] [2021-11-23 13:48:18,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:18,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:48:18,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:18,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:48:18,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:18,108 INFO L87 Difference]: Start difference. First operand 6362 states and 9030 transitions. Second operand has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2021-11-23 13:48:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:20,042 INFO L93 Difference]: Finished difference Result 23484 states and 33492 transitions. [2021-11-23 13:48:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:48:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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 267 [2021-11-23 13:48:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:20,064 INFO L225 Difference]: With dead ends: 23484 [2021-11-23 13:48:20,064 INFO L226 Difference]: Without dead ends: 17193 [2021-11-23 13:48:20,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:48:20,071 INFO L933 BasicCegarLoop]: 4750 mSDtfsCounter, 7521 mSDsluCounter, 11298 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7521 SdHoareTripleChecker+Valid, 16048 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:20,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7521 Valid, 16048 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:48:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17193 states. [2021-11-23 13:48:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17193 to 6533. [2021-11-23 13:48:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6533 states, 6531 states have (on average 1.4088194763435922) internal successors, (9201), 6532 states have internal predecessors, (9201), 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) [2021-11-23 13:48:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6533 states to 6533 states and 9201 transitions. [2021-11-23 13:48:20,887 INFO L78 Accepts]: Start accepts. Automaton has 6533 states and 9201 transitions. Word has length 267 [2021-11-23 13:48:20,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:20,888 INFO L470 AbstractCegarLoop]: Abstraction has 6533 states and 9201 transitions. [2021-11-23 13:48:20,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2021-11-23 13:48:20,888 INFO L276 IsEmpty]: Start isEmpty. Operand 6533 states and 9201 transitions. [2021-11-23 13:48:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 13:48:20,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:20,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:20,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-23 13:48:20,897 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1514846260, now seen corresponding path program 1 times [2021-11-23 13:48:20,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:20,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907250075] [2021-11-23 13:48:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:20,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:20,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:20,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907250075] [2021-11-23 13:48:20,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907250075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:20,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:20,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:48:20,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584094533] [2021-11-23 13:48:20,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:20,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:48:20,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:20,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:48:20,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:20,970 INFO L87 Difference]: Start difference. First operand 6533 states and 9201 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 2 states have internal predecessors, (259), 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) [2021-11-23 13:48:22,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:22,726 INFO L93 Difference]: Finished difference Result 18913 states and 26626 transitions. [2021-11-23 13:48:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:48:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 2 states have internal predecessors, (259), 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 267 [2021-11-23 13:48:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:22,746 INFO L225 Difference]: With dead ends: 18913 [2021-11-23 13:48:22,746 INFO L226 Difference]: Without dead ends: 12456 [2021-11-23 13:48:22,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:48:22,756 INFO L933 BasicCegarLoop]: 2555 mSDtfsCounter, 2329 mSDsluCounter, 2306 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 4861 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:22,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2329 Valid, 4861 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:48:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12456 states. [2021-11-23 13:48:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12456 to 12444. [2021-11-23 13:48:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12444 states, 12442 states have (on average 1.403070245941167) internal successors, (17457), 12443 states have internal predecessors, (17457), 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) [2021-11-23 13:48:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12444 states to 12444 states and 17457 transitions. [2021-11-23 13:48:24,273 INFO L78 Accepts]: Start accepts. Automaton has 12444 states and 17457 transitions. Word has length 267 [2021-11-23 13:48:24,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:24,274 INFO L470 AbstractCegarLoop]: Abstraction has 12444 states and 17457 transitions. [2021-11-23 13:48:24,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 2 states have internal predecessors, (259), 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) [2021-11-23 13:48:24,274 INFO L276 IsEmpty]: Start isEmpty. Operand 12444 states and 17457 transitions. [2021-11-23 13:48:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 13:48:24,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:24,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:24,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-23 13:48:24,285 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:24,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:24,286 INFO L85 PathProgramCache]: Analyzing trace with hash 320981395, now seen corresponding path program 1 times [2021-11-23 13:48:24,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:24,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021585916] [2021-11-23 13:48:24,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:24,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:24,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:24,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021585916] [2021-11-23 13:48:24,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021585916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:24,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:24,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:48:24,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134157819] [2021-11-23 13:48:24,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:24,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:48:24,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:24,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:48:24,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:24,366 INFO L87 Difference]: Start difference. First operand 12444 states and 17457 transitions. Second operand has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2021-11-23 13:48:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:27,255 INFO L93 Difference]: Finished difference Result 35230 states and 49656 transitions. [2021-11-23 13:48:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:48:27,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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 267 [2021-11-23 13:48:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:27,283 INFO L225 Difference]: With dead ends: 35230 [2021-11-23 13:48:27,284 INFO L226 Difference]: Without dead ends: 22866 [2021-11-23 13:48:27,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:48:27,296 INFO L933 BasicCegarLoop]: 2524 mSDtfsCounter, 8112 mSDsluCounter, 10055 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8112 SdHoareTripleChecker+Valid, 12579 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:27,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8112 Valid, 12579 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:48:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22866 states. [2021-11-23 13:48:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22866 to 12612. [2021-11-23 13:48:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12612 states, 12610 states have (on average 1.3934972244250594) internal successors, (17572), 12611 states have internal predecessors, (17572), 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) [2021-11-23 13:48:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12612 states to 12612 states and 17572 transitions. [2021-11-23 13:48:28,790 INFO L78 Accepts]: Start accepts. Automaton has 12612 states and 17572 transitions. Word has length 267 [2021-11-23 13:48:28,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:28,791 INFO L470 AbstractCegarLoop]: Abstraction has 12612 states and 17572 transitions. [2021-11-23 13:48:28,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2021-11-23 13:48:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 12612 states and 17572 transitions. [2021-11-23 13:48:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 13:48:28,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:28,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:28,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-23 13:48:28,803 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:28,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:28,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1829940081, now seen corresponding path program 1 times [2021-11-23 13:48:28,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:28,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866863342] [2021-11-23 13:48:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:28,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:28,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:28,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866863342] [2021-11-23 13:48:28,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866863342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:28,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:28,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:48:28,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994824802] [2021-11-23 13:48:28,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:28,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:48:28,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:28,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:48:28,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:28,887 INFO L87 Difference]: Start difference. First operand 12612 states and 17572 transitions. Second operand has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2021-11-23 13:48:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:33,438 INFO L93 Difference]: Finished difference Result 44854 states and 62972 transitions. [2021-11-23 13:48:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:48:33,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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 267 [2021-11-23 13:48:33,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:33,483 INFO L225 Difference]: With dead ends: 44854 [2021-11-23 13:48:33,483 INFO L226 Difference]: Without dead ends: 32329 [2021-11-23 13:48:33,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:48:33,499 INFO L933 BasicCegarLoop]: 4617 mSDtfsCounter, 6916 mSDsluCounter, 10707 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6916 SdHoareTripleChecker+Valid, 15324 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:33,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6916 Valid, 15324 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:48:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32329 states. [2021-11-23 13:48:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32329 to 12939. [2021-11-23 13:48:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12939 states, 12937 states have (on average 1.383551055113241) internal successors, (17899), 12938 states have internal predecessors, (17899), 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) [2021-11-23 13:48:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12939 states to 12939 states and 17899 transitions. [2021-11-23 13:48:35,448 INFO L78 Accepts]: Start accepts. Automaton has 12939 states and 17899 transitions. Word has length 267 [2021-11-23 13:48:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:35,448 INFO L470 AbstractCegarLoop]: Abstraction has 12939 states and 17899 transitions. [2021-11-23 13:48:35,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2021-11-23 13:48:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 12939 states and 17899 transitions. [2021-11-23 13:48:35,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 13:48:35,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:35,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:35,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-23 13:48:35,460 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:35,461 INFO L85 PathProgramCache]: Analyzing trace with hash 390794061, now seen corresponding path program 1 times [2021-11-23 13:48:35,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:35,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482373061] [2021-11-23 13:48:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:35,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:35,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:35,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482373061] [2021-11-23 13:48:35,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482373061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:35,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:35,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:35,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175057380] [2021-11-23 13:48:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:35,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:35,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:35,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:35,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:35,539 INFO L87 Difference]: Start difference. First operand 12939 states and 17899 transitions. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-11-23 13:48:39,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:39,739 INFO L93 Difference]: Finished difference Result 44023 states and 60815 transitions. [2021-11-23 13:48:39,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:48:39,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 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 267 [2021-11-23 13:48:39,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:39,785 INFO L225 Difference]: With dead ends: 44023 [2021-11-23 13:48:39,785 INFO L226 Difference]: Without dead ends: 31176 [2021-11-23 13:48:39,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:39,802 INFO L933 BasicCegarLoop]: 2535 mSDtfsCounter, 6775 mSDsluCounter, 5936 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6775 SdHoareTripleChecker+Valid, 8471 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:39,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6775 Valid, 8471 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:48:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31176 states. [2021-11-23 13:48:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31176 to 24774. [2021-11-23 13:48:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24774 states, 24772 states have (on average 1.3783303730017762) internal successors, (34144), 24773 states have internal predecessors, (34144), 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) [2021-11-23 13:48:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24774 states to 24774 states and 34144 transitions. [2021-11-23 13:48:43,151 INFO L78 Accepts]: Start accepts. Automaton has 24774 states and 34144 transitions. Word has length 267 [2021-11-23 13:48:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:43,152 INFO L470 AbstractCegarLoop]: Abstraction has 24774 states and 34144 transitions. [2021-11-23 13:48:43,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-11-23 13:48:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 24774 states and 34144 transitions. [2021-11-23 13:48:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 13:48:43,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:43,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:43,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-23 13:48:43,167 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:43,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:43,167 INFO L85 PathProgramCache]: Analyzing trace with hash -810762165, now seen corresponding path program 1 times [2021-11-23 13:48:43,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:43,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765433039] [2021-11-23 13:48:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:43,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:43,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:43,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765433039] [2021-11-23 13:48:43,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765433039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:43,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:43,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:48:43,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585059801] [2021-11-23 13:48:43,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:43,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:48:43,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:48:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:48:43,459 INFO L87 Difference]: Start difference. First operand 24774 states and 34144 transitions. Second operand has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2021-11-23 13:48:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:50,329 INFO L93 Difference]: Finished difference Result 68580 states and 95102 transitions. [2021-11-23 13:48:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:48:50,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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 267 [2021-11-23 13:48:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:50,387 INFO L225 Difference]: With dead ends: 68580 [2021-11-23 13:48:50,387 INFO L226 Difference]: Without dead ends: 43902 [2021-11-23 13:48:50,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:48:50,405 INFO L933 BasicCegarLoop]: 2524 mSDtfsCounter, 7452 mSDsluCounter, 9255 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7452 SdHoareTripleChecker+Valid, 11779 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:50,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7452 Valid, 11779 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:48:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43902 states. [2021-11-23 13:48:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43902 to 25098. [2021-11-23 13:48:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25098 states, 25096 states have (on average 1.3694214217405165) internal successors, (34367), 25097 states have internal predecessors, (34367), 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) [2021-11-23 13:48:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25098 states to 25098 states and 34367 transitions. [2021-11-23 13:48:54,800 INFO L78 Accepts]: Start accepts. Automaton has 25098 states and 34367 transitions. Word has length 267 [2021-11-23 13:48:54,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:54,801 INFO L470 AbstractCegarLoop]: Abstraction has 25098 states and 34367 transitions. [2021-11-23 13:48:54,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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) [2021-11-23 13:48:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 25098 states and 34367 transitions. [2021-11-23 13:48:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 13:48:54,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:54,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:54,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-23 13:48:54,813 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:54,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2081678663, now seen corresponding path program 1 times [2021-11-23 13:48:54,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:54,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106980739] [2021-11-23 13:48:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:54,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:48:54,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:54,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106980739] [2021-11-23 13:48:54,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106980739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:48:54,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:48:54,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:48:54,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158819385] [2021-11-23 13:48:54,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:48:54,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:48:54,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:54,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:48:54,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:48:54,884 INFO L87 Difference]: Start difference. First operand 25098 states and 34367 transitions. Second operand has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-11-23 13:49:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:04,242 INFO L93 Difference]: Finished difference Result 85545 states and 116986 transitions. [2021-11-23 13:49:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:49:04,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 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 267 [2021-11-23 13:49:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:04,328 INFO L225 Difference]: With dead ends: 85545 [2021-11-23 13:49:04,329 INFO L226 Difference]: Without dead ends: 60545 [2021-11-23 13:49:04,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:04,352 INFO L933 BasicCegarLoop]: 2587 mSDtfsCounter, 6750 mSDsluCounter, 6398 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6750 SdHoareTripleChecker+Valid, 8985 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:04,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6750 Valid, 8985 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:49:04,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60545 states. [2021-11-23 13:49:11,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60545 to 48153. [2021-11-23 13:49:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48153 states, 48151 states have (on average 1.3645407156653029) internal successors, (65704), 48152 states have internal predecessors, (65704), 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) [2021-11-23 13:49:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48153 states to 48153 states and 65704 transitions. [2021-11-23 13:49:12,075 INFO L78 Accepts]: Start accepts. Automaton has 48153 states and 65704 transitions. Word has length 267 [2021-11-23 13:49:12,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:12,075 INFO L470 AbstractCegarLoop]: Abstraction has 48153 states and 65704 transitions. [2021-11-23 13:49:12,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.75) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-11-23 13:49:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 48153 states and 65704 transitions. [2021-11-23 13:49:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-23 13:49:12,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:12,098 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:12,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-23 13:49:12,098 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:12,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:12,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1286725734, now seen corresponding path program 1 times [2021-11-23 13:49:12,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:12,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426165727] [2021-11-23 13:49:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:12,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 13:49:12,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:12,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426165727] [2021-11-23 13:49:12,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426165727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:49:12,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:49:12,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:49:12,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548455129] [2021-11-23 13:49:12,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:49:12,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:49:12,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:12,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:49:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:49:12,174 INFO L87 Difference]: Start difference. First operand 48153 states and 65704 transitions. Second operand has 5 states, 5 states have (on average 51.8) internal successors, (259), 5 states have internal predecessors, (259), 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)