./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/seq-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/seq-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN --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 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:14:06,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:14:06,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:14:06,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:14:06,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:14:06,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:14:06,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:14:06,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:14:06,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:14:06,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:14:06,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:14:06,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:14:06,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:14:06,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:14:06,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:14:06,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:14:06,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:14:06,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:14:06,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:14:06,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:14:06,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:14:06,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:14:06,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:14:06,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:14:06,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:14:06,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:14:06,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:14:06,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:14:06,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:14:06,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:14:06,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:14:06,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:14:06,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:14:06,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:14:06,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:14:06,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:14:06,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:14:06,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:14:06,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:14:06,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:14:06,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:14:06,161 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:14:06,199 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:14:06,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:14:06,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:14:06,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:14:06,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:14:06,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:14:06,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:14:06,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:14:06,203 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:14:06,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:14:06,203 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:14:06,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:14:06,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:14:06,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:14:06,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:14:06,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:14:06,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:14:06,205 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:14:06,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:14:06,205 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:14:06,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:14:06,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:14:06,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:14:06,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:14:06,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:14:06,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:14:06,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:14:06,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:14:06,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:14:06,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:14:06,208 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:14:06,208 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:14:06,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:14:06,208 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_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 [2022-11-20 11:14:06,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:14:06,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:14:06,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:14:06,493 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:14:06,493 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:14:06,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/loop-invgen/seq-3.i [2022-11-20 11:14:09,770 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:14:10,107 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:14:10,107 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/sv-benchmarks/c/loop-invgen/seq-3.i [2022-11-20 11:14:10,115 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/data/d2f42ed74/6434d0164c824cf6aa4b496e672ee319/FLAG97cac9ad0 [2022-11-20 11:14:10,136 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/data/d2f42ed74/6434d0164c824cf6aa4b496e672ee319 [2022-11-20 11:14:10,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:14:10,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:14:10,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:14:10,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:14:10,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:14:10,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@659995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10, skipping insertion in model container [2022-11-20 11:14:10,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:14:10,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:14:10,399 WARN L237 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_1b7a812f-ad0e-4b94-86df-6be3db87ce72/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2022-11-20 11:14:10,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:14:10,438 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:14:10,456 WARN L237 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_1b7a812f-ad0e-4b94-86df-6be3db87ce72/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2022-11-20 11:14:10,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:14:10,494 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:14:10,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10 WrapperNode [2022-11-20 11:14:10,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:14:10,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:14:10,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:14:10,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:14:10,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,529 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-20 11:14:10,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:14:10,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:14:10,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:14:10,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:14:10,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,570 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:14:10,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:14:10,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:14:10,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:14:10,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10" (1/1) ... [2022-11-20 11:14:10,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:14:10,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:10,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:14:10,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:14:10,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:14:10,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:14:10,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:14:10,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:14:10,731 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:14:10,733 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:14:10,885 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:14:10,891 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:14:10,892 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:14:10,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:14:10 BoogieIcfgContainer [2022-11-20 11:14:10,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:14:10,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:14:10,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:14:10,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:14:10,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:14:10" (1/3) ... [2022-11-20 11:14:10,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5f3b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:14:10, skipping insertion in model container [2022-11-20 11:14:10,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:10" (2/3) ... [2022-11-20 11:14:10,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5f3b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:14:10, skipping insertion in model container [2022-11-20 11:14:10,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:14:10" (3/3) ... [2022-11-20 11:14:10,905 INFO L112 eAbstractionObserver]: Analyzing ICFG seq-3.i [2022-11-20 11:14:10,928 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:14:10,928 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:14:10,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:14:10,990 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7bf659eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:14:10,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:14:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:14:11,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:11,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:11,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash -163175075, now seen corresponding path program 1 times [2022-11-20 11:14:11,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:11,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981620761] [2022-11-20 11:14:11,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:11,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:11,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:11,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981620761] [2022-11-20 11:14:11,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981620761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:11,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:11,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:14:11,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163741594] [2022-11-20 11:14:11,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:11,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:14:11,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:11,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:14:11,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:14:11,531 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 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 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:11,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:11,733 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-11-20 11:14:11,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:14:11,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-20 11:14:11,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:11,753 INFO L225 Difference]: With dead ends: 48 [2022-11-20 11:14:11,753 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 11:14:11,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:14:11,766 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:11,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 60 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 11:14:11,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2022-11-20 11:14:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-20 11:14:11,815 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2022-11-20 11:14:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:11,817 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-20 11:14:11,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:11,818 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-20 11:14:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:14:11,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:11,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:11,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:14:11,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:11,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:11,822 INFO L85 PathProgramCache]: Analyzing trace with hash -712013865, now seen corresponding path program 1 times [2022-11-20 11:14:11,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:11,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298468870] [2022-11-20 11:14:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:11,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:11,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:11,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298468870] [2022-11-20 11:14:11,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298468870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:11,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872788167] [2022-11-20 11:14:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:11,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:11,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:11,989 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:12,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:14:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:12,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:14:12,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:12,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:12,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872788167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:12,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:14:12,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 11:14:12,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32330812] [2022-11-20 11:14:12,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:12,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:14:12,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:12,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:14:12,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:14:12,242 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:12,326 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-11-20 11:14:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:14:12,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-20 11:14:12,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:12,327 INFO L225 Difference]: With dead ends: 26 [2022-11-20 11:14:12,327 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 11:14:12,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:14:12,329 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:12,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:14:12,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 11:14:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-11-20 11:14:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-20 11:14:12,335 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2022-11-20 11:14:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:12,335 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-20 11:14:12,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-20 11:14:12,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:14:12,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:12,336 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:12,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:14:12,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:12,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1243265849, now seen corresponding path program 1 times [2022-11-20 11:14:12,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:12,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258499480] [2022-11-20 11:14:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:12,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:12,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:12,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258499480] [2022-11-20 11:14:12,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258499480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:12,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064471918] [2022-11-20 11:14:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:12,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:12,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:12,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:12,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:14:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:12,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:14:12,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:13,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:13,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064471918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:13,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:13,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-20 11:14:13,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106487397] [2022-11-20 11:14:13,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:13,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:14:13,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:13,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:14:13,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:14:13,313 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:13,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:13,539 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-11-20 11:14:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:14:13,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 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 15 [2022-11-20 11:14:13,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:13,542 INFO L225 Difference]: With dead ends: 38 [2022-11-20 11:14:13,542 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 11:14:13,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:14:13,544 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:13,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 100 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 11:14:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2022-11-20 11:14:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-20 11:14:13,551 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2022-11-20 11:14:13,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:13,551 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-20 11:14:13,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-20 11:14:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:14:13,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:13,553 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:13,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:13,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:13,759 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2084334856, now seen corresponding path program 1 times [2022-11-20 11:14:13,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:13,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940924502] [2022-11-20 11:14:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:13,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:13,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:13,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940924502] [2022-11-20 11:14:13,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940924502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:13,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372072472] [2022-11-20 11:14:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:13,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:13,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:13,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:13,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:14:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:13,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:14:13,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:14,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:14,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372072472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:14,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:14,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-20 11:14:14,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567428614] [2022-11-20 11:14:14,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:14,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:14:14,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:14,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:14:14,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:14:14,281 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:14,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:14,480 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-11-20 11:14:14,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:14:14,482 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 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 15 [2022-11-20 11:14:14,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:14,485 INFO L225 Difference]: With dead ends: 50 [2022-11-20 11:14:14,486 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 11:14:14,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:14:14,492 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:14,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 60 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 11:14:14,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2022-11-20 11:14:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-20 11:14:14,511 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2022-11-20 11:14:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:14,512 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-20 11:14:14,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:14,512 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-20 11:14:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:14:14,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:14,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:14,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:14,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:14,723 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash -929410893, now seen corresponding path program 2 times [2022-11-20 11:14:14,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:14,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467848416] [2022-11-20 11:14:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:14,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:14,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:14,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467848416] [2022-11-20 11:14:14,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467848416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:14,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486263595] [2022-11-20 11:14:14,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:14:14,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:14,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:14,861 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:14,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:14:14,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:14:14,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:14,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:14:14,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:14,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:15,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486263595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:15,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:15,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-11-20 11:14:15,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010957039] [2022-11-20 11:14:15,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:15,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:14:15,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:15,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:14:15,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:14:15,047 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:15,145 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-20 11:14:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:14:15,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 16 [2022-11-20 11:14:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:15,149 INFO L225 Difference]: With dead ends: 32 [2022-11-20 11:14:15,149 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 11:14:15,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:14:15,151 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:15,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 61 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:14:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 11:14:15,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-11-20 11:14:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-20 11:14:15,166 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2022-11-20 11:14:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:15,166 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-20 11:14:15,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-20 11:14:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:14:15,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:15,168 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:15,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:15,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:15,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:15,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1579087069, now seen corresponding path program 3 times [2022-11-20 11:14:15,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:15,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278572139] [2022-11-20 11:14:15,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:15,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:15,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:15,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278572139] [2022-11-20 11:14:15,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278572139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:15,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131184863] [2022-11-20 11:14:15,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:14:15,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:15,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:15,512 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:15,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:14:15,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:14:15,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:15,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:14:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:15,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:15,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131184863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:15,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:15,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-20 11:14:15,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435829183] [2022-11-20 11:14:15,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:15,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 11:14:15,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 11:14:15,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:14:15,913 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:16,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:16,145 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-11-20 11:14:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:14:16,145 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 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 19 [2022-11-20 11:14:16,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:16,145 INFO L225 Difference]: With dead ends: 51 [2022-11-20 11:14:16,146 INFO L226 Difference]: Without dead ends: 38 [2022-11-20 11:14:16,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:14:16,147 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:16,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 90 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-20 11:14:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2022-11-20 11:14:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-20 11:14:16,153 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2022-11-20 11:14:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:16,154 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-20 11:14:16,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-20 11:14:16,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:14:16,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:16,155 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:16,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:16,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 11:14:16,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:16,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1678234908, now seen corresponding path program 1 times [2022-11-20 11:14:16,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:16,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716593687] [2022-11-20 11:14:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:16,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:16,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:16,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716593687] [2022-11-20 11:14:16,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716593687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:16,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64600376] [2022-11-20 11:14:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:16,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:16,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:16,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:16,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:14:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:16,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:14:16,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:16,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:16,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64600376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:16,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:16,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-11-20 11:14:16,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721539915] [2022-11-20 11:14:16,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:16,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:14:16,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:16,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:14:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:14:16,871 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:17,116 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-11-20 11:14:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:14:17,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 19 [2022-11-20 11:14:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:17,117 INFO L225 Difference]: With dead ends: 64 [2022-11-20 11:14:17,117 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 11:14:17,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:14:17,118 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 89 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:17,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 102 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 11:14:17,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 25. [2022-11-20 11:14:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-20 11:14:17,126 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2022-11-20 11:14:17,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:17,126 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-20 11:14:17,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-20 11:14:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:14:17,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:17,127 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:17,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:17,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 11:14:17,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:17,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1265791229, now seen corresponding path program 2 times [2022-11-20 11:14:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:17,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254368452] [2022-11-20 11:14:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:17,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:17,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254368452] [2022-11-20 11:14:17,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254368452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405069778] [2022-11-20 11:14:17,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:14:17,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:17,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:17,476 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:17,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:14:17,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:14:17,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:14:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:17,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:17,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405069778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:17,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:17,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-11-20 11:14:17,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008710828] [2022-11-20 11:14:17,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:17,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:14:17,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:17,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:14:17,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:14:17,840 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:18,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:18,094 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-11-20 11:14:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:14:18,094 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 19 [2022-11-20 11:14:18,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:18,095 INFO L225 Difference]: With dead ends: 79 [2022-11-20 11:14:18,095 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 11:14:18,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:14:18,096 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 99 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:18,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 106 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 11:14:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 27. [2022-11-20 11:14:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-20 11:14:18,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2022-11-20 11:14:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:18,105 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-20 11:14:18,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-20 11:14:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:14:18,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:18,106 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:18,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:18,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:18,313 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:18,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:18,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1081918121, now seen corresponding path program 4 times [2022-11-20 11:14:18,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:18,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381742994] [2022-11-20 11:14:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:18,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:18,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:18,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381742994] [2022-11-20 11:14:18,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381742994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:18,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992057142] [2022-11-20 11:14:18,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:14:18,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:18,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:18,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:18,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:14:18,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:14:18,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:18,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:14:18,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:18,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:18,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992057142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:18,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:18,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-11-20 11:14:18,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706641174] [2022-11-20 11:14:18,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:18,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:14:18,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:18,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:14:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:14:18,589 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:18,695 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-11-20 11:14:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:14:18,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 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 20 [2022-11-20 11:14:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:18,696 INFO L225 Difference]: With dead ends: 38 [2022-11-20 11:14:18,696 INFO L226 Difference]: Without dead ends: 36 [2022-11-20 11:14:18,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:14:18,697 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:18,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:18,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-20 11:14:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-11-20 11:14:18,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-20 11:14:18,706 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2022-11-20 11:14:18,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:18,706 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-20 11:14:18,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:18,706 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-20 11:14:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:14:18,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:18,707 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:18,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:18,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 11:14:18,913 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:18,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:18,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1983310407, now seen corresponding path program 5 times [2022-11-20 11:14:18,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:18,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143250176] [2022-11-20 11:14:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:18,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:19,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:19,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143250176] [2022-11-20 11:14:19,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143250176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:19,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836970194] [2022-11-20 11:14:19,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:14:19,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:19,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:19,103 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:19,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:14:19,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 11:14:19,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:19,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:14:19,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:19,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:19,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836970194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:19,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:19,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-20 11:14:19,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822043520] [2022-11-20 11:14:19,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:19,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 11:14:19,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:19,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 11:14:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:14:19,577 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:19,846 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-11-20 11:14:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:14:19,846 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 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 23 [2022-11-20 11:14:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:19,847 INFO L225 Difference]: With dead ends: 64 [2022-11-20 11:14:19,847 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 11:14:19,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:14:19,849 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:19,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 121 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:19,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 11:14:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2022-11-20 11:14:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-20 11:14:19,857 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-11-20 11:14:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:19,857 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-20 11:14:19,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-20 11:14:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:14:19,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:19,858 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:19,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:20,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:14:20,059 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:20,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:20,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1279672712, now seen corresponding path program 2 times [2022-11-20 11:14:20,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:20,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457643157] [2022-11-20 11:14:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:20,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:20,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:20,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457643157] [2022-11-20 11:14:20,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457643157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:20,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775349548] [2022-11-20 11:14:20,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:14:20,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:20,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:20,253 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:20,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:14:20,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:14:20,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:20,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:14:20,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:20,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:20,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775349548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:20,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:20,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2022-11-20 11:14:20,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487179165] [2022-11-20 11:14:20,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:20,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:14:20,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:20,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:14:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:14:20,726 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:21,039 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-11-20 11:14:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:14:21,039 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 23 [2022-11-20 11:14:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:21,040 INFO L225 Difference]: With dead ends: 81 [2022-11-20 11:14:21,040 INFO L226 Difference]: Without dead ends: 65 [2022-11-20 11:14:21,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 11:14:21,042 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:21,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 133 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-20 11:14:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 31. [2022-11-20 11:14:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-20 11:14:21,052 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-11-20 11:14:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:21,053 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-20 11:14:21,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-20 11:14:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:14:21,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:21,054 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:21,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:21,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:21,260 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:21,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:21,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1791066585, now seen corresponding path program 3 times [2022-11-20 11:14:21,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:21,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538511388] [2022-11-20 11:14:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:21,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:21,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:21,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538511388] [2022-11-20 11:14:21,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538511388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:21,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525533749] [2022-11-20 11:14:21,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:14:21,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:21,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:21,487 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:21,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:14:21,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:14:21,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:21,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:14:21,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:21,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:21,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525533749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:21,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:21,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-11-20 11:14:21,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718398042] [2022-11-20 11:14:21,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:21,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:14:21,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:21,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:14:21,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:14:21,937 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:22,320 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-11-20 11:14:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:14:22,320 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 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 23 [2022-11-20 11:14:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:22,321 INFO L225 Difference]: With dead ends: 97 [2022-11-20 11:14:22,321 INFO L226 Difference]: Without dead ends: 81 [2022-11-20 11:14:22,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 11:14:22,324 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 120 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:22,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 152 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-20 11:14:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 31. [2022-11-20 11:14:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-20 11:14:22,338 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2022-11-20 11:14:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:22,338 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-20 11:14:22,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-20 11:14:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:14:22,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:22,342 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:22,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:22,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:22,548 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:22,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:22,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1712107944, now seen corresponding path program 3 times [2022-11-20 11:14:22,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:22,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405782990] [2022-11-20 11:14:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:22,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:22,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:22,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405782990] [2022-11-20 11:14:22,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405782990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:22,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208755850] [2022-11-20 11:14:22,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:14:22,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:22,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:22,722 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:22,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:14:22,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:14:22,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:22,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:14:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:22,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:23,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208755850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:23,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:23,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-11-20 11:14:23,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402810575] [2022-11-20 11:14:23,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:23,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 11:14:23,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:23,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 11:14:23,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:14:23,133 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:23,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:23,445 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-11-20 11:14:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:14:23,445 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 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 23 [2022-11-20 11:14:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:23,448 INFO L225 Difference]: With dead ends: 115 [2022-11-20 11:14:23,448 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 11:14:23,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:14:23,450 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 149 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:23,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 119 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:23,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 11:14:23,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 33. [2022-11-20 11:14:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-20 11:14:23,466 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2022-11-20 11:14:23,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:23,466 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-20 11:14:23,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:23,467 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-20 11:14:23,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:14:23,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:23,469 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:23,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:23,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:23,675 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:23,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1769959117, now seen corresponding path program 6 times [2022-11-20 11:14:23,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:23,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951215920] [2022-11-20 11:14:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:23,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:23,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:23,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951215920] [2022-11-20 11:14:23,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951215920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133933315] [2022-11-20 11:14:23,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:14:23,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:23,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:23,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:14:23,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 11:14:23,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:23,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:14:23,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:23,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:24,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133933315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:24,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:24,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2022-11-20 11:14:24,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796561458] [2022-11-20 11:14:24,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:24,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:14:24,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:14:24,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:14:24,038 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:24,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:24,171 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-11-20 11:14:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:14:24,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 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 24 [2022-11-20 11:14:24,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:24,172 INFO L225 Difference]: With dead ends: 44 [2022-11-20 11:14:24,172 INFO L226 Difference]: Without dead ends: 42 [2022-11-20 11:14:24,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:14:24,174 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:24,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 84 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-20 11:14:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-11-20 11:14:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-20 11:14:24,193 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2022-11-20 11:14:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:24,193 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-20 11:14:24,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-20 11:14:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 11:14:24,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:24,194 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:24,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:24,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:14:24,400 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash 466281565, now seen corresponding path program 7 times [2022-11-20 11:14:24,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:24,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959199699] [2022-11-20 11:14:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:24,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:24,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:24,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959199699] [2022-11-20 11:14:24,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959199699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:24,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092790406] [2022-11-20 11:14:24,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:14:24,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:24,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:24,660 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:24,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:14:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:24,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:14:24,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:25,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:25,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092790406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:25,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:25,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2022-11-20 11:14:25,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081437609] [2022-11-20 11:14:25,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:25,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:14:25,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:25,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:14:25,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:14:25,282 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:25,595 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-11-20 11:14:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:14:25,596 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 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 27 [2022-11-20 11:14:25,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:25,596 INFO L225 Difference]: With dead ends: 77 [2022-11-20 11:14:25,596 INFO L226 Difference]: Without dead ends: 58 [2022-11-20 11:14:25,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:14:25,598 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:25,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 147 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-20 11:14:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2022-11-20 11:14:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-20 11:14:25,611 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-11-20 11:14:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:25,611 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-20 11:14:25,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-20 11:14:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 11:14:25,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:25,613 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:25,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:25,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:14:25,819 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash 397088156, now seen corresponding path program 4 times [2022-11-20 11:14:25,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:25,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697203498] [2022-11-20 11:14:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:25,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:26,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:26,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697203498] [2022-11-20 11:14:26,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697203498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:26,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094247658] [2022-11-20 11:14:26,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:14:26,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:26,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:26,022 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:26,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:14:26,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:14:26,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:26,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:14:26,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:26,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:26,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094247658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:26,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:26,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2022-11-20 11:14:26,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074222] [2022-11-20 11:14:26,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:26,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 11:14:26,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:26,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 11:14:26,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:14:26,601 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:26,945 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2022-11-20 11:14:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:14:26,945 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 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 27 [2022-11-20 11:14:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:26,946 INFO L225 Difference]: With dead ends: 98 [2022-11-20 11:14:26,946 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 11:14:26,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 11:14:26,948 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:26,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 104 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 11:14:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 37. [2022-11-20 11:14:26,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-20 11:14:26,960 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-11-20 11:14:26,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:26,961 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-20 11:14:26,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-20 11:14:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 11:14:26,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:26,962 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:26,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:27,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:14:27,168 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1267711875, now seen corresponding path program 5 times [2022-11-20 11:14:27,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:27,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513015019] [2022-11-20 11:14:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:27,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:27,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:27,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513015019] [2022-11-20 11:14:27,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513015019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:27,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212190549] [2022-11-20 11:14:27,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:14:27,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:27,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:27,357 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:27,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:14:27,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-20 11:14:27,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:27,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:14:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:27,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:27,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212190549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:27,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:27,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-11-20 11:14:27,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245722803] [2022-11-20 11:14:27,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:27,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 11:14:27,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:27,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 11:14:27,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:14:27,916 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:28,370 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2022-11-20 11:14:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:14:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 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 27 [2022-11-20 11:14:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:28,372 INFO L225 Difference]: With dead ends: 118 [2022-11-20 11:14:28,372 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 11:14:28,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 11:14:28,374 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 104 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:28,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 171 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 11:14:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 37. [2022-11-20 11:14:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-20 11:14:28,395 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-11-20 11:14:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:28,396 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-20 11:14:28,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-20 11:14:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 11:14:28,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:28,399 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:28,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:28,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:14:28,606 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:28,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:28,606 INFO L85 PathProgramCache]: Analyzing trace with hash 618247548, now seen corresponding path program 6 times [2022-11-20 11:14:28,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:28,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014286654] [2022-11-20 11:14:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:28,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:28,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:28,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014286654] [2022-11-20 11:14:28,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014286654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:28,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528298655] [2022-11-20 11:14:28,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:14:28,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:28,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:28,838 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:28,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 11:14:28,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 11:14:28,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:28,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:14:28,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:29,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:29,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528298655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:29,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:29,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2022-11-20 11:14:29,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287325597] [2022-11-20 11:14:29,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:29,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 11:14:29,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 11:14:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:14:29,451 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:29,901 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2022-11-20 11:14:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:14:29,901 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 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 27 [2022-11-20 11:14:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:29,902 INFO L225 Difference]: With dead ends: 137 [2022-11-20 11:14:29,903 INFO L226 Difference]: Without dead ends: 118 [2022-11-20 11:14:29,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 11:14:29,904 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 173 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:29,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 133 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-20 11:14:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 37. [2022-11-20 11:14:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-20 11:14:29,921 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2022-11-20 11:14:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:29,921 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-20 11:14:29,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-20 11:14:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 11:14:29,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:29,923 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:29,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:30,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:14:30,130 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:30,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:30,130 INFO L85 PathProgramCache]: Analyzing trace with hash 956179613, now seen corresponding path program 4 times [2022-11-20 11:14:30,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:30,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350538741] [2022-11-20 11:14:30,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:30,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:30,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350538741] [2022-11-20 11:14:30,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350538741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667748925] [2022-11-20 11:14:30,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:14:30,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:30,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:30,362 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:30,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 11:14:30,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:14:30,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:30,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:14:30,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:30,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:30,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667748925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:30,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:30,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-11-20 11:14:30,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711443842] [2022-11-20 11:14:30,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:30,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 11:14:30,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:30,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 11:14:30,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:14:30,925 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:31,386 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2022-11-20 11:14:31,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:14:31,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 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 27 [2022-11-20 11:14:31,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:31,387 INFO L225 Difference]: With dead ends: 158 [2022-11-20 11:14:31,387 INFO L226 Difference]: Without dead ends: 139 [2022-11-20 11:14:31,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:14:31,389 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 151 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:31,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 150 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-20 11:14:31,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 39. [2022-11-20 11:14:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-11-20 11:14:31,407 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2022-11-20 11:14:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:31,407 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-11-20 11:14:31,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-11-20 11:14:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 11:14:31,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:31,409 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:31,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:31,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:31,615 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1056697641, now seen corresponding path program 8 times [2022-11-20 11:14:31,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:31,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078159847] [2022-11-20 11:14:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:31,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:31,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:31,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078159847] [2022-11-20 11:14:31,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078159847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:31,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853863012] [2022-11-20 11:14:31,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:14:31,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:31,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:31,766 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:31,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 11:14:31,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:14:31,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:31,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:14:31,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:31,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:32,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853863012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:32,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:32,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-11-20 11:14:32,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754976655] [2022-11-20 11:14:32,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:32,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:14:32,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:32,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:14:32,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:14:32,011 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:32,194 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-11-20 11:14:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:14:32,194 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 28 [2022-11-20 11:14:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:32,195 INFO L225 Difference]: With dead ends: 50 [2022-11-20 11:14:32,195 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 11:14:32,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:14:32,198 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:32,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 80 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:32,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 11:14:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-11-20 11:14:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-11-20 11:14:32,224 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 28 [2022-11-20 11:14:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:32,225 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-11-20 11:14:32,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-11-20 11:14:32,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:14:32,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:32,226 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:32,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:32,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:32,432 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:32,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2035699769, now seen corresponding path program 9 times [2022-11-20 11:14:32,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:32,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591895409] [2022-11-20 11:14:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:32,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:32,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591895409] [2022-11-20 11:14:32,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591895409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571848728] [2022-11-20 11:14:32,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:14:32,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:32,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:32,773 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:32,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 11:14:32,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 11:14:32,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:14:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:33,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:33,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571848728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:33,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:33,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-20 11:14:33,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979982837] [2022-11-20 11:14:33,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:33,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 11:14:33,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:33,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 11:14:33,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 11:14:33,618 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:34,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:34,079 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2022-11-20 11:14:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:14:34,079 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 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 31 [2022-11-20 11:14:34,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:34,080 INFO L225 Difference]: With dead ends: 90 [2022-11-20 11:14:34,080 INFO L226 Difference]: Without dead ends: 68 [2022-11-20 11:14:34,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=442, Invalid=1720, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 11:14:34,082 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:34,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 157 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:34,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-20 11:14:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2022-11-20 11:14:34,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-20 11:14:34,104 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-11-20 11:14:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:34,104 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-20 11:14:34,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-20 11:14:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:14:34,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:34,105 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:34,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-20 11:14:34,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:14:34,312 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:34,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:34,312 INFO L85 PathProgramCache]: Analyzing trace with hash 992856568, now seen corresponding path program 7 times [2022-11-20 11:14:34,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:34,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982020239] [2022-11-20 11:14:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:34,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:34,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:34,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982020239] [2022-11-20 11:14:34,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982020239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:34,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617245283] [2022-11-20 11:14:34,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:14:34,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:34,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:34,614 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:34,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 11:14:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:34,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:14:34,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:35,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:35,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617245283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:35,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:35,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-11-20 11:14:35,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255506886] [2022-11-20 11:14:35,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:35,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 11:14:35,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:35,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 11:14:35,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:14:35,316 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:35,880 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2022-11-20 11:14:35,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:14:35,881 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 11:14:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:35,881 INFO L225 Difference]: With dead ends: 115 [2022-11-20 11:14:35,882 INFO L226 Difference]: Without dead ends: 93 [2022-11-20 11:14:35,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=490, Invalid=2060, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 11:14:35,883 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 93 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:35,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 225 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:14:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-20 11:14:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 43. [2022-11-20 11:14:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-20 11:14:35,899 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-11-20 11:14:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:35,899 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-20 11:14:35,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:35,900 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-20 11:14:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:14:35,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:35,900 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:35,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:36,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 11:14:36,106 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:36,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1236311129, now seen corresponding path program 8 times [2022-11-20 11:14:36,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:36,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845326705] [2022-11-20 11:14:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:36,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:36,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:36,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845326705] [2022-11-20 11:14:36,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845326705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:36,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653151827] [2022-11-20 11:14:36,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:14:36,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:36,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:36,399 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:36,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 11:14:36,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:14:36,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:36,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:14:36,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:36,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:37,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653151827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:37,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:37,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2022-11-20 11:14:37,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064180270] [2022-11-20 11:14:37,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:37,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 11:14:37,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:37,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 11:14:37,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:14:37,118 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:37,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:37,754 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2022-11-20 11:14:37,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:14:37,755 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 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 31 [2022-11-20 11:14:37,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:37,756 INFO L225 Difference]: With dead ends: 139 [2022-11-20 11:14:37,756 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 11:14:37,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=520, Invalid=2236, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:14:37,758 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 152 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:37,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 173 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:14:37,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 11:14:37,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 43. [2022-11-20 11:14:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-20 11:14:37,790 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-11-20 11:14:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:37,790 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-20 11:14:37,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-20 11:14:37,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:14:37,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:37,792 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:37,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:37,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 11:14:37,998 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:37,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:37,998 INFO L85 PathProgramCache]: Analyzing trace with hash -834045480, now seen corresponding path program 9 times [2022-11-20 11:14:37,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:37,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565759247] [2022-11-20 11:14:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:37,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:38,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:38,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565759247] [2022-11-20 11:14:38,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565759247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:38,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422603190] [2022-11-20 11:14:38,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:14:38,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:38,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:38,270 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:38,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 11:14:38,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 11:14:38,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:38,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:14:38,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:38,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:38,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422603190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:38,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:38,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-11-20 11:14:38,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871853541] [2022-11-20 11:14:38,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:38,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 11:14:38,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:38,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 11:14:38,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:14:38,943 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:39,489 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2022-11-20 11:14:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 11:14:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 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 31 [2022-11-20 11:14:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:39,491 INFO L225 Difference]: With dead ends: 162 [2022-11-20 11:14:39,491 INFO L226 Difference]: Without dead ends: 140 [2022-11-20 11:14:39,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=519, Invalid=2237, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:14:39,493 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 173 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:39,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 171 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:39,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-20 11:14:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 43. [2022-11-20 11:14:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-20 11:14:39,518 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-11-20 11:14:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:39,518 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-20 11:14:39,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-20 11:14:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:14:39,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:39,519 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:39,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:39,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 11:14:39,725 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:39,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:39,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1315926137, now seen corresponding path program 10 times [2022-11-20 11:14:39,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:39,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51902489] [2022-11-20 11:14:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:39,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:39,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:39,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51902489] [2022-11-20 11:14:39,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51902489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:39,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898044899] [2022-11-20 11:14:39,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:14:39,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:39,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:39,955 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:39,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 11:14:40,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:14:40,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:40,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:14:40,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:40,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:40,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898044899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:40,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:40,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-11-20 11:14:40,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502706380] [2022-11-20 11:14:40,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:40,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:14:40,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:14:40,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:14:40,553 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:41,097 INFO L93 Difference]: Finished difference Result 184 states and 197 transitions. [2022-11-20 11:14:41,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 11:14:41,097 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 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 31 [2022-11-20 11:14:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:41,098 INFO L225 Difference]: With dead ends: 184 [2022-11-20 11:14:41,098 INFO L226 Difference]: Without dead ends: 162 [2022-11-20 11:14:41,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=487, Invalid=2063, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 11:14:41,100 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 177 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:41,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 165 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:41,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-20 11:14:41,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 43. [2022-11-20 11:14:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-20 11:14:41,126 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2022-11-20 11:14:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:41,126 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-20 11:14:41,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-20 11:14:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:14:41,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:41,127 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:41,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:41,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:41,333 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:41,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:41,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1246732728, now seen corresponding path program 5 times [2022-11-20 11:14:41,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:41,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733406485] [2022-11-20 11:14:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:41,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:41,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733406485] [2022-11-20 11:14:41,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733406485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644318330] [2022-11-20 11:14:41,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:14:41,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:41,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:41,576 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:41,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 11:14:41,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-20 11:14:41,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:41,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:14:41,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:41,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:42,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644318330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:42,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:42,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2022-11-20 11:14:42,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856414241] [2022-11-20 11:14:42,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:42,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 11:14:42,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:42,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 11:14:42,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:14:42,184 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:42,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:42,700 INFO L93 Difference]: Finished difference Result 208 states and 223 transitions. [2022-11-20 11:14:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:14:42,701 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 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 31 [2022-11-20 11:14:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:42,701 INFO L225 Difference]: With dead ends: 208 [2022-11-20 11:14:42,702 INFO L226 Difference]: Without dead ends: 186 [2022-11-20 11:14:42,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 11:14:42,703 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 255 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:42,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 129 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-20 11:14:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 45. [2022-11-20 11:14:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-11-20 11:14:42,723 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 31 [2022-11-20 11:14:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:42,723 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-11-20 11:14:42,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-11-20 11:14:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 11:14:42,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:42,724 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:42,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-20 11:14:42,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:42,924 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:42,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1761587635, now seen corresponding path program 10 times [2022-11-20 11:14:42,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:42,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570888126] [2022-11-20 11:14:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:42,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:43,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:43,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570888126] [2022-11-20 11:14:43,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570888126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:43,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251364561] [2022-11-20 11:14:43,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:14:43,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:43,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:43,075 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:43,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 11:14:43,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:14:43,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:43,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:14:43,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:43,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:43,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251364561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:43,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:43,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-11-20 11:14:43,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138811429] [2022-11-20 11:14:43,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:43,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:14:43,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:14:43,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:14:43,307 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:43,486 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-11-20 11:14:43,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:14:43,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 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 32 [2022-11-20 11:14:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:43,488 INFO L225 Difference]: With dead ends: 56 [2022-11-20 11:14:43,488 INFO L226 Difference]: Without dead ends: 54 [2022-11-20 11:14:43,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:14:43,489 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:43,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 100 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-20 11:14:43,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-11-20 11:14:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-20 11:14:43,518 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 32 [2022-11-20 11:14:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:43,519 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-20 11:14:43,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-20 11:14:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 11:14:43,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:43,520 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:43,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:43,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 11:14:43,726 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:43,727 INFO L85 PathProgramCache]: Analyzing trace with hash -743312419, now seen corresponding path program 11 times [2022-11-20 11:14:43,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:43,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812300085] [2022-11-20 11:14:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:43,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:44,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:44,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812300085] [2022-11-20 11:14:44,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812300085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:44,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580537471] [2022-11-20 11:14:44,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:14:44,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:44,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:44,033 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:44,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 11:14:44,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-20 11:14:44,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:44,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:14:44,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:44,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:44,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580537471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:44,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:44,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-11-20 11:14:44,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434980410] [2022-11-20 11:14:44,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:44,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 11:14:44,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:44,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 11:14:44,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 11:14:44,872 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:45,357 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-11-20 11:14:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:14:45,357 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-20 11:14:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:45,358 INFO L225 Difference]: With dead ends: 103 [2022-11-20 11:14:45,358 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 11:14:45,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=551, Invalid=2205, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:14:45,360 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:45,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 142 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:45,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 11:14:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2022-11-20 11:14:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-20 11:14:45,392 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-11-20 11:14:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:45,392 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-20 11:14:45,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-20 11:14:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 11:14:45,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:45,393 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:45,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-20 11:14:45,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 11:14:45,594 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:45,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2052557284, now seen corresponding path program 11 times [2022-11-20 11:14:45,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:45,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844572296] [2022-11-20 11:14:45,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:45,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:45,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:45,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844572296] [2022-11-20 11:14:45,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844572296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:45,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100751235] [2022-11-20 11:14:45,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:14:45,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:45,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:45,905 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:45,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 11:14:46,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-20 11:14:46,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:46,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:14:46,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:46,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:46,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100751235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:46,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:46,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2022-11-20 11:14:46,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778820042] [2022-11-20 11:14:46,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:46,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 11:14:46,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:46,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 11:14:46,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:14:46,713 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:47,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:47,363 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2022-11-20 11:14:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:14:47,364 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-20 11:14:47,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:47,364 INFO L225 Difference]: With dead ends: 132 [2022-11-20 11:14:47,365 INFO L226 Difference]: Without dead ends: 107 [2022-11-20 11:14:47,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=2684, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 11:14:47,367 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:47,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 182 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:14:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-20 11:14:47,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 49. [2022-11-20 11:14:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-20 11:14:47,404 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-11-20 11:14:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:47,404 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-20 11:14:47,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-20 11:14:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 11:14:47,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:47,405 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:47,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:47,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 11:14:47,611 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:47,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:47,612 INFO L85 PathProgramCache]: Analyzing trace with hash 399060989, now seen corresponding path program 12 times [2022-11-20 11:14:47,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:47,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826027755] [2022-11-20 11:14:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:47,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:47,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826027755] [2022-11-20 11:14:47,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826027755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018901082] [2022-11-20 11:14:47,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:14:47,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:47,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:47,915 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:47,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 11:14:47,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-20 11:14:47,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:47,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:14:47,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:48,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:48,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018901082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:48,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:48,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2022-11-20 11:14:48,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033078965] [2022-11-20 11:14:48,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:48,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 11:14:48,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:48,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 11:14:48,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:14:48,623 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:49,281 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2022-11-20 11:14:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 11:14:49,282 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 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 35 [2022-11-20 11:14:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:49,283 INFO L225 Difference]: With dead ends: 160 [2022-11-20 11:14:49,283 INFO L226 Difference]: Without dead ends: 135 [2022-11-20 11:14:49,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=675, Invalid=2985, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 11:14:49,285 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 134 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:49,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 167 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:49,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-20 11:14:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 49. [2022-11-20 11:14:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-20 11:14:49,319 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-11-20 11:14:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:49,319 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-20 11:14:49,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-20 11:14:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 11:14:49,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:49,320 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:49,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:49,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:49,523 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1045875204, now seen corresponding path program 13 times [2022-11-20 11:14:49,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:49,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689976052] [2022-11-20 11:14:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:49,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:49,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:49,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689976052] [2022-11-20 11:14:49,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689976052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:49,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60854344] [2022-11-20 11:14:49,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:14:49,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:49,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:49,804 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:49,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 11:14:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:49,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:14:49,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:50,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:50,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60854344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:50,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:50,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 34 [2022-11-20 11:14:50,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939296531] [2022-11-20 11:14:50,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:50,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:14:50,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:50,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:14:50,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:14:50,460 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:51,279 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2022-11-20 11:14:51,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:14:51,279 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-20 11:14:51,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:51,280 INFO L225 Difference]: With dead ends: 187 [2022-11-20 11:14:51,280 INFO L226 Difference]: Without dead ends: 162 [2022-11-20 11:14:51,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 15 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=693, Invalid=3089, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 11:14:51,282 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 174 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:51,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 207 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:14:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-20 11:14:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 49. [2022-11-20 11:14:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-20 11:14:51,313 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-11-20 11:14:51,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:51,313 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-20 11:14:51,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-20 11:14:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 11:14:51,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:51,314 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:51,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-20 11:14:51,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:51,519 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash 985723933, now seen corresponding path program 14 times [2022-11-20 11:14:51,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:51,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657448909] [2022-11-20 11:14:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:51,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:51,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:51,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657448909] [2022-11-20 11:14:51,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657448909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:51,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212255735] [2022-11-20 11:14:51,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:14:51,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:51,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:51,786 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:51,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 11:14:51,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:14:51,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:51,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:14:51,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:52,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:52,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212255735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:52,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:52,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2022-11-20 11:14:52,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066541455] [2022-11-20 11:14:52,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:52,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 11:14:52,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:52,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 11:14:52,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 11:14:52,545 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:53,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:53,279 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2022-11-20 11:14:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 11:14:53,280 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 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 35 [2022-11-20 11:14:53,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:53,281 INFO L225 Difference]: With dead ends: 213 [2022-11-20 11:14:53,281 INFO L226 Difference]: Without dead ends: 188 [2022-11-20 11:14:53,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=673, Invalid=2987, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 11:14:53,282 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 208 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:53,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 163 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-20 11:14:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 49. [2022-11-20 11:14:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-20 11:14:53,319 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-11-20 11:14:53,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:53,319 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-20 11:14:53,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-20 11:14:53,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 11:14:53,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:53,320 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:53,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:53,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:53,521 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:53,521 INFO L85 PathProgramCache]: Analyzing trace with hash -57119268, now seen corresponding path program 15 times [2022-11-20 11:14:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:53,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066329995] [2022-11-20 11:14:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:53,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:53,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:53,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066329995] [2022-11-20 11:14:53,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066329995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:53,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113072723] [2022-11-20 11:14:53,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:14:53,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:53,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:53,823 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:53,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 11:14:53,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 11:14:53,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:53,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:14:53,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:54,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:54,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113072723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:54,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:54,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2022-11-20 11:14:54,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32668329] [2022-11-20 11:14:54,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:54,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 11:14:54,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:54,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 11:14:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:14:54,554 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:55,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:55,395 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2022-11-20 11:14:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:14:55,396 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-20 11:14:55,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:55,396 INFO L225 Difference]: With dead ends: 238 [2022-11-20 11:14:55,396 INFO L226 Difference]: Without dead ends: 213 [2022-11-20 11:14:55,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 15 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=618, Invalid=2688, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 11:14:55,397 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:55,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 184 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:14:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-20 11:14:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 49. [2022-11-20 11:14:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-20 11:14:55,437 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2022-11-20 11:14:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:55,437 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-20 11:14:55,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-20 11:14:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 11:14:55,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:55,438 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:55,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:55,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:55,645 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:55,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:55,645 INFO L85 PathProgramCache]: Analyzing trace with hash 186335293, now seen corresponding path program 6 times [2022-11-20 11:14:55,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:55,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503490582] [2022-11-20 11:14:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:55,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:55,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503490582] [2022-11-20 11:14:55,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503490582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:55,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816184225] [2022-11-20 11:14:55,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:14:55,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:55,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:55,926 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:55,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 11:14:55,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-20 11:14:55,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:55,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:14:55,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:56,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:56,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816184225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:56,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:56,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2022-11-20 11:14:56,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970343219] [2022-11-20 11:14:56,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:56,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 11:14:56,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:56,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 11:14:56,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:14:56,622 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:57,306 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2022-11-20 11:14:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 11:14:57,306 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-20 11:14:57,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:57,307 INFO L225 Difference]: With dead ends: 265 [2022-11-20 11:14:57,307 INFO L226 Difference]: Without dead ends: 240 [2022-11-20 11:14:57,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:14:57,308 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 231 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:57,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 184 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-20 11:14:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 51. [2022-11-20 11:14:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-11-20 11:14:57,337 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 35 [2022-11-20 11:14:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:57,337 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-11-20 11:14:57,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-11-20 11:14:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:14:57,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:57,338 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:57,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-20 11:14:57,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:57,544 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash 611977303, now seen corresponding path program 12 times [2022-11-20 11:14:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:57,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707487544] [2022-11-20 11:14:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:57,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:57,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:57,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707487544] [2022-11-20 11:14:57,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707487544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:57,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125429625] [2022-11-20 11:14:57,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:14:57,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:57,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:57,717 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:57,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 11:14:57,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-20 11:14:57,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:57,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:14:57,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:57,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:57,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125429625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:57,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:57,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-11-20 11:14:57,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838994696] [2022-11-20 11:14:57,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:57,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:14:57,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:57,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:14:57,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:14:57,979 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:58,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:58,203 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-11-20 11:14:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:14:58,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 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 36 [2022-11-20 11:14:58,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:58,204 INFO L225 Difference]: With dead ends: 62 [2022-11-20 11:14:58,204 INFO L226 Difference]: Without dead ends: 60 [2022-11-20 11:14:58,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 14 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:14:58,205 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:58,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 123 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:14:58,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-20 11:14:58,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-11-20 11:14:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-11-20 11:14:58,241 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 36 [2022-11-20 11:14:58,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:58,241 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-11-20 11:14:58,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:58,241 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-11-20 11:14:58,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:14:58,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:58,242 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:58,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-20 11:14:58,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:58,443 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:14:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:58,443 INFO L85 PathProgramCache]: Analyzing trace with hash -715494727, now seen corresponding path program 13 times [2022-11-20 11:14:58,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:14:58,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842078515] [2022-11-20 11:14:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:58,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:14:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:58,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:14:58,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842078515] [2022-11-20 11:14:58,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842078515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:14:58,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548578644] [2022-11-20 11:14:58,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:14:58,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:14:58,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:14:58,756 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:14:58,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 11:14:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:58,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:14:58,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:59,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:59,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548578644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:59,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:14:59,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2022-11-20 11:14:59,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95452169] [2022-11-20 11:14:59,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:59,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:14:59,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:14:59,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:14:59,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:14:59,729 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:00,309 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2022-11-20 11:15:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:15:00,310 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 11:15:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:00,310 INFO L225 Difference]: With dead ends: 116 [2022-11-20 11:15:00,311 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 11:15:00,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=672, Invalid=2750, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 11:15:00,312 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:00,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 177 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 11:15:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2022-11-20 11:15:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-20 11:15:00,357 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-20 11:15:00,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:00,357 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-20 11:15:00,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-20 11:15:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:15:00,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:00,358 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:00,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:00,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 11:15:00,564 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:00,565 INFO L85 PathProgramCache]: Analyzing trace with hash -944261768, now seen corresponding path program 16 times [2022-11-20 11:15:00,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:00,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703038149] [2022-11-20 11:15:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:00,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:00,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:00,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703038149] [2022-11-20 11:15:00,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703038149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:00,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783909334] [2022-11-20 11:15:00,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:15:00,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:00,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:00,913 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:00,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 11:15:00,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:15:00,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:00,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:15:00,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:01,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:01,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783909334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:01,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:01,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2022-11-20 11:15:01,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43242196] [2022-11-20 11:15:01,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:01,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 11:15:01,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:01,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 11:15:01,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:15:01,808 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:02,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:02,585 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2022-11-20 11:15:02,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 11:15:02,585 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 11:15:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:02,586 INFO L225 Difference]: With dead ends: 149 [2022-11-20 11:15:02,586 INFO L226 Difference]: Without dead ends: 121 [2022-11-20 11:15:02,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=770, Invalid=3390, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 11:15:02,588 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 108 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:02,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 179 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:02,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-20 11:15:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 55. [2022-11-20 11:15:02,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-20 11:15:02,636 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-20 11:15:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:02,636 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-20 11:15:02,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:02,637 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-20 11:15:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:15:02,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:02,637 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:02,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-20 11:15:02,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-20 11:15:02,838 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:02,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:02,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2060020007, now seen corresponding path program 17 times [2022-11-20 11:15:02,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:02,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188045037] [2022-11-20 11:15:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:02,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:03,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:03,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188045037] [2022-11-20 11:15:03,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188045037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:03,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662068002] [2022-11-20 11:15:03,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:15:03,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:03,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:03,193 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:03,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 11:15:03,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 11:15:03,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:03,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:15:03,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:03,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:04,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662068002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:04,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:04,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 39 [2022-11-20 11:15:04,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366670402] [2022-11-20 11:15:04,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:04,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 11:15:04,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:04,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 11:15:04,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:15:04,194 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:05,168 INFO L93 Difference]: Finished difference Result 181 states and 194 transitions. [2022-11-20 11:15:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 11:15:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 11:15:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:05,169 INFO L225 Difference]: With dead ends: 181 [2022-11-20 11:15:05,169 INFO L226 Difference]: Without dead ends: 153 [2022-11-20 11:15:05,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 17 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=851, Invalid=3841, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 11:15:05,171 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 118 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:05,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 275 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-20 11:15:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 55. [2022-11-20 11:15:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:05,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-20 11:15:05,256 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-20 11:15:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:05,256 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-20 11:15:05,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-20 11:15:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:15:05,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:05,257 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:05,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:05,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 11:15:05,463 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:05,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:05,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1818917544, now seen corresponding path program 18 times [2022-11-20 11:15:05,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:05,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063140103] [2022-11-20 11:15:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:05,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:05,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063140103] [2022-11-20 11:15:05,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063140103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:05,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635912829] [2022-11-20 11:15:05,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:15:05,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:05,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:05,815 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:05,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 11:15:05,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-20 11:15:05,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:05,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:15:05,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:06,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:06,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635912829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:06,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:06,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 38 [2022-11-20 11:15:06,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315069357] [2022-11-20 11:15:06,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:06,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 11:15:06,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:06,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 11:15:06,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:15:06,741 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:07,705 INFO L93 Difference]: Finished difference Result 212 states and 226 transitions. [2022-11-20 11:15:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 11:15:07,706 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 11:15:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:07,707 INFO L225 Difference]: With dead ends: 212 [2022-11-20 11:15:07,707 INFO L226 Difference]: Without dead ends: 184 [2022-11-20 11:15:07,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 17 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=894, Invalid=4076, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 11:15:07,709 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 181 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:07,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 195 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:07,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-20 11:15:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 55. [2022-11-20 11:15:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:07,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-20 11:15:07,760 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-20 11:15:07,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:07,760 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-20 11:15:07,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:07,760 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-20 11:15:07,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:15:07,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:07,761 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:07,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:07,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 11:15:07,967 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash 544164601, now seen corresponding path program 19 times [2022-11-20 11:15:07,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:07,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163881429] [2022-11-20 11:15:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:07,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:08,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:08,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163881429] [2022-11-20 11:15:08,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163881429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:08,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127804660] [2022-11-20 11:15:08,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:15:08,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:08,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:08,323 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:08,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 11:15:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:08,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:15:08,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:08,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:09,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127804660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:09,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:09,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2022-11-20 11:15:09,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974555607] [2022-11-20 11:15:09,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:09,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 11:15:09,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:09,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 11:15:09,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 11:15:09,117 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:10,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:10,094 INFO L93 Difference]: Finished difference Result 242 states and 257 transitions. [2022-11-20 11:15:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 11:15:10,094 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 11:15:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:10,096 INFO L225 Difference]: With dead ends: 242 [2022-11-20 11:15:10,096 INFO L226 Difference]: Without dead ends: 214 [2022-11-20 11:15:10,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 17 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=893, Invalid=4077, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 11:15:10,097 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 225 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:10,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 184 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-20 11:15:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 55. [2022-11-20 11:15:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-20 11:15:10,147 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-20 11:15:10,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:10,147 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-20 11:15:10,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-20 11:15:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:15:10,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:10,148 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:10,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-20 11:15:10,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 11:15:10,349 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash -765080264, now seen corresponding path program 20 times [2022-11-20 11:15:10,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:10,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774044432] [2022-11-20 11:15:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:10,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:10,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:10,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774044432] [2022-11-20 11:15:10,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774044432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:10,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664139884] [2022-11-20 11:15:10,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:15:10,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:10,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:10,673 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:10,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 11:15:10,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:15:10,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:10,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:15:10,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:11,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:11,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664139884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:11,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:11,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 36 [2022-11-20 11:15:11,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441331213] [2022-11-20 11:15:11,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:11,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 11:15:11,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:11,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 11:15:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:15:11,469 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:12,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:12,603 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2022-11-20 11:15:12,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 11:15:12,603 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 11:15:12,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:12,604 INFO L225 Difference]: With dead ends: 271 [2022-11-20 11:15:12,605 INFO L226 Difference]: Without dead ends: 243 [2022-11-20 11:15:12,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 46 SyntacticMatches, 17 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=848, Invalid=3844, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 11:15:12,607 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 212 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:12,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 237 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:12,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-20 11:15:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 55. [2022-11-20 11:15:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-20 11:15:12,706 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-20 11:15:12,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:12,706 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-20 11:15:12,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-20 11:15:12,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:15:12,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:12,708 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:12,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:12,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:12,914 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:12,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:12,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1686538009, now seen corresponding path program 21 times [2022-11-20 11:15:12,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:12,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140279153] [2022-11-20 11:15:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:12,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:13,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:13,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140279153] [2022-11-20 11:15:13,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140279153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:13,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944128631] [2022-11-20 11:15:13,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:15:13,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:13,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:13,239 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:13,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-20 11:15:13,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 11:15:13,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:13,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:15:13,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:13,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:13,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944128631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:13,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:13,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2022-11-20 11:15:13,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142490115] [2022-11-20 11:15:13,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:13,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 11:15:13,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:13,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 11:15:13,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:15:13,971 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:14,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:14,989 INFO L93 Difference]: Finished difference Result 299 states and 316 transitions. [2022-11-20 11:15:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 11:15:14,989 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 11:15:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:14,991 INFO L225 Difference]: With dead ends: 299 [2022-11-20 11:15:14,991 INFO L226 Difference]: Without dead ends: 271 [2022-11-20 11:15:14,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 11:15:14,992 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 257 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:14,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 219 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-20 11:15:15,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 55. [2022-11-20 11:15:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-20 11:15:15,065 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2022-11-20 11:15:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:15,065 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-20 11:15:15,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-20 11:15:15,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:15:15,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:15,066 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:15,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:15,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:15,272 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash 241601816, now seen corresponding path program 7 times [2022-11-20 11:15:15,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:15,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888203735] [2022-11-20 11:15:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:15,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:15,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:15,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888203735] [2022-11-20 11:15:15,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888203735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:15,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210847009] [2022-11-20 11:15:15,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:15:15,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:15,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:15,589 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:15,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-20 11:15:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:15,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:15:15,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:16,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:16,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210847009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:16,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:16,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2022-11-20 11:15:16,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777744107] [2022-11-20 11:15:16,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:16,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:15:16,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:16,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:15:16,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:15:16,329 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:17,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:17,238 INFO L93 Difference]: Finished difference Result 329 states and 348 transitions. [2022-11-20 11:15:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 11:15:17,238 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 11:15:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:17,239 INFO L225 Difference]: With dead ends: 329 [2022-11-20 11:15:17,240 INFO L226 Difference]: Without dead ends: 301 [2022-11-20 11:15:17,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 48 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=665, Invalid=2757, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 11:15:17,241 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 331 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:17,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 148 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-20 11:15:17,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 57. [2022-11-20 11:15:17,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-11-20 11:15:17,313 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 39 [2022-11-20 11:15:17,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:17,313 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-11-20 11:15:17,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:17,314 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-11-20 11:15:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 11:15:17,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:17,315 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:17,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:17,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-20 11:15:17,522 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:17,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:17,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1565543885, now seen corresponding path program 14 times [2022-11-20 11:15:17,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:17,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284270895] [2022-11-20 11:15:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:17,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:17,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:17,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284270895] [2022-11-20 11:15:17,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284270895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:17,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25764858] [2022-11-20 11:15:17,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:15:17,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:17,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:17,723 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:17,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-20 11:15:17,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:15:17,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:17,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:17,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:17,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:18,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25764858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:18,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:18,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-11-20 11:15:18,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700894296] [2022-11-20 11:15:18,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:18,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:15:18,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:18,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:15:18,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:15:18,008 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:18,306 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-11-20 11:15:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:15:18,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 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 40 [2022-11-20 11:15:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:18,307 INFO L225 Difference]: With dead ends: 68 [2022-11-20 11:15:18,307 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 11:15:18,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 16 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:15:18,308 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 78 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:18,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 149 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:18,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 11:15:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-11-20 11:15:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-11-20 11:15:18,380 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 40 [2022-11-20 11:15:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:18,380 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-11-20 11:15:18,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-11-20 11:15:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:15:18,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:18,382 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:18,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:18,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-20 11:15:18,588 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash -63167651, now seen corresponding path program 15 times [2022-11-20 11:15:18,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:18,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974223823] [2022-11-20 11:15:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:18,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:19,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:19,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974223823] [2022-11-20 11:15:19,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974223823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:19,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801057224] [2022-11-20 11:15:19,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:15:19,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:19,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:19,024 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:19,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-20 11:15:19,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-20 11:15:19,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:19,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:19,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:19,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:20,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801057224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:20,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:20,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-20 11:15:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670627951] [2022-11-20 11:15:20,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:20,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 11:15:20,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:20,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 11:15:20,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 11:15:20,103 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:20,810 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2022-11-20 11:15:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:15:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 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 43 [2022-11-20 11:15:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:20,812 INFO L225 Difference]: With dead ends: 129 [2022-11-20 11:15:20,812 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 11:15:20,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=805, Invalid=3355, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 11:15:20,813 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 64 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:20,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 153 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:20,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 11:15:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2022-11-20 11:15:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:20,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-20 11:15:20,907 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-20 11:15:20,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:20,907 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-20 11:15:20,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:20,908 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-20 11:15:20,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:15:20,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:20,908 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:20,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:21,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-20 11:15:21,114 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:21,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:21,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1788348772, now seen corresponding path program 22 times [2022-11-20 11:15:21,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:21,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562701839] [2022-11-20 11:15:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:21,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:21,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:21,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562701839] [2022-11-20 11:15:21,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562701839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:21,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100260434] [2022-11-20 11:15:21,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:15:21,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:21,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:21,463 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:21,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-20 11:15:21,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:15:21,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:21,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:21,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:22,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:22,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100260434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:22,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:22,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2022-11-20 11:15:22,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975779633] [2022-11-20 11:15:22,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:22,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 11:15:22,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:22,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 11:15:22,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 11:15:22,421 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:23,219 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2022-11-20 11:15:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 11:15:23,219 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-20 11:15:23,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:23,231 INFO L225 Difference]: With dead ends: 166 [2022-11-20 11:15:23,231 INFO L226 Difference]: Without dead ends: 135 [2022-11-20 11:15:23,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 19 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=934, Invalid=4178, Unknown=0, NotChecked=0, Total=5112 [2022-11-20 11:15:23,232 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:23,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 178 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:23,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-20 11:15:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2022-11-20 11:15:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-20 11:15:23,290 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-20 11:15:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:23,291 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-20 11:15:23,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-20 11:15:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:15:23,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:23,292 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:23,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:23,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-20 11:15:23,497 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:23,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash -874168451, now seen corresponding path program 23 times [2022-11-20 11:15:23,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:23,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109665228] [2022-11-20 11:15:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:23,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:23,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:23,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109665228] [2022-11-20 11:15:23,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109665228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:23,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309207099] [2022-11-20 11:15:23,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:15:23,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:23,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:23,804 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:23,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-20 11:15:23,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-20 11:15:23,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:23,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:23,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:24,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:24,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309207099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:24,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:24,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2022-11-20 11:15:24,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114065227] [2022-11-20 11:15:24,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:24,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 11:15:24,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:24,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 11:15:24,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1477, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:15:24,685 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:25,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:25,714 INFO L93 Difference]: Finished difference Result 202 states and 216 transitions. [2022-11-20 11:15:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 11:15:25,714 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 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 43 [2022-11-20 11:15:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:25,715 INFO L225 Difference]: With dead ends: 202 [2022-11-20 11:15:25,715 INFO L226 Difference]: Without dead ends: 171 [2022-11-20 11:15:25,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 19 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2502 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1048, Invalid=4804, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 11:15:25,715 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:25,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 230 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-20 11:15:25,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 61. [2022-11-20 11:15:25,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-20 11:15:25,775 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-20 11:15:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:25,776 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-20 11:15:25,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-20 11:15:25,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:15:25,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:25,777 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:25,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-20 11:15:25,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-20 11:15:25,977 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1675962756, now seen corresponding path program 24 times [2022-11-20 11:15:25,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:25,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662974141] [2022-11-20 11:15:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:25,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:26,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662974141] [2022-11-20 11:15:26,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662974141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722732441] [2022-11-20 11:15:26,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:15:26,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:26,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:26,299 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:26,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-20 11:15:26,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-20 11:15:26,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:26,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:26,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:27,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722732441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:27,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:27,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 42 [2022-11-20 11:15:27,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17391927] [2022-11-20 11:15:27,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:27,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 11:15:27,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:27,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 11:15:27,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 11:15:27,142 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:28,247 INFO L93 Difference]: Finished difference Result 237 states and 252 transitions. [2022-11-20 11:15:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 11:15:28,247 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-20 11:15:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:28,248 INFO L225 Difference]: With dead ends: 237 [2022-11-20 11:15:28,249 INFO L226 Difference]: Without dead ends: 206 [2022-11-20 11:15:28,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 48 SyntacticMatches, 19 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1122, Invalid=5198, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 11:15:28,250 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 200 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:28,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 202 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:28,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-20 11:15:28,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 61. [2022-11-20 11:15:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-20 11:15:28,336 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-20 11:15:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:28,336 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-20 11:15:28,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:28,337 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-20 11:15:28,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:15:28,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:28,337 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:28,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:28,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:28,538 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:28,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:28,538 INFO L85 PathProgramCache]: Analyzing trace with hash -177806435, now seen corresponding path program 25 times [2022-11-20 11:15:28,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:28,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782772052] [2022-11-20 11:15:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:28,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:28,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:28,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782772052] [2022-11-20 11:15:28,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782772052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:28,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840531118] [2022-11-20 11:15:28,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:15:28,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:28,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:28,843 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:28,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-20 11:15:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:28,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:28,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:29,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:29,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840531118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:29,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:29,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2022-11-20 11:15:29,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076933567] [2022-11-20 11:15:29,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:29,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:15:29,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:15:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:15:29,673 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:30,848 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2022-11-20 11:15:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 11:15:30,849 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 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 43 [2022-11-20 11:15:30,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:30,850 INFO L225 Difference]: With dead ends: 271 [2022-11-20 11:15:30,850 INFO L226 Difference]: Without dead ends: 240 [2022-11-20 11:15:30,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 19 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1147, Invalid=5333, Unknown=0, NotChecked=0, Total=6480 [2022-11-20 11:15:30,851 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 232 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:30,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 195 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-20 11:15:30,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 61. [2022-11-20 11:15:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-20 11:15:30,916 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-20 11:15:30,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:30,916 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-20 11:15:30,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-20 11:15:30,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:15:30,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:30,917 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:30,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-20 11:15:31,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:31,119 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:31,119 INFO L85 PathProgramCache]: Analyzing trace with hash -406573476, now seen corresponding path program 26 times [2022-11-20 11:15:31,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:31,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587314324] [2022-11-20 11:15:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:31,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:31,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:31,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587314324] [2022-11-20 11:15:31,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587314324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:31,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069397818] [2022-11-20 11:15:31,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:15:31,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:31,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:31,407 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:31,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-20 11:15:31,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:15:31,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:31,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:31,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:31,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:32,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069397818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:32,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:32,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 40 [2022-11-20 11:15:32,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535890246] [2022-11-20 11:15:32,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:32,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 11:15:32,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:32,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 11:15:32,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:15:32,244 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:33,478 INFO L93 Difference]: Finished difference Result 304 states and 321 transitions. [2022-11-20 11:15:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 11:15:33,478 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 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 43 [2022-11-20 11:15:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:33,479 INFO L225 Difference]: With dead ends: 304 [2022-11-20 11:15:33,479 INFO L226 Difference]: Without dead ends: 273 [2022-11-20 11:15:33,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 50 SyntacticMatches, 19 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1120, Invalid=5200, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 11:15:33,480 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 304 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:33,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 227 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-20 11:15:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 61. [2022-11-20 11:15:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-20 11:15:33,571 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-20 11:15:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:33,571 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-20 11:15:33,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-20 11:15:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:15:33,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:33,572 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:33,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:33,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-20 11:15:33,775 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:33,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1522331715, now seen corresponding path program 27 times [2022-11-20 11:15:33,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:33,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637679137] [2022-11-20 11:15:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:33,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:34,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:34,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637679137] [2022-11-20 11:15:34,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637679137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:34,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129110895] [2022-11-20 11:15:34,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:15:34,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:34,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:34,064 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:34,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-20 11:15:34,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-20 11:15:34,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:34,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:34,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:34,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129110895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:34,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:34,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2022-11-20 11:15:34,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585806989] [2022-11-20 11:15:34,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:34,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 11:15:34,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 11:15:34,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:15:34,857 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:36,066 INFO L93 Difference]: Finished difference Result 336 states and 354 transitions. [2022-11-20 11:15:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 11:15:36,066 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 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 43 [2022-11-20 11:15:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:36,068 INFO L225 Difference]: With dead ends: 336 [2022-11-20 11:15:36,068 INFO L226 Difference]: Without dead ends: 305 [2022-11-20 11:15:36,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 51 SyntacticMatches, 19 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1044, Invalid=4808, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 11:15:36,069 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 299 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:36,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 206 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-20 11:15:36,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 61. [2022-11-20 11:15:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-20 11:15:36,175 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-20 11:15:36,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:36,176 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-20 11:15:36,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-20 11:15:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:15:36,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:36,177 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:36,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:36,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:36,382 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:36,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1281229252, now seen corresponding path program 28 times [2022-11-20 11:15:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:36,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619721174] [2022-11-20 11:15:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:36,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:36,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619721174] [2022-11-20 11:15:36,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619721174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127471561] [2022-11-20 11:15:36,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:15:36,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:36,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:36,671 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:36,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-20 11:15:36,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:15:36,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:36,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:36,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:37,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:37,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127471561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:37,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:37,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2022-11-20 11:15:37,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707652054] [2022-11-20 11:15:37,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:37,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 11:15:37,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:37,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 11:15:37,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:15:37,393 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:38,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:38,684 INFO L93 Difference]: Finished difference Result 367 states and 386 transitions. [2022-11-20 11:15:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 11:15:38,685 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-20 11:15:38,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:38,686 INFO L225 Difference]: With dead ends: 367 [2022-11-20 11:15:38,686 INFO L226 Difference]: Without dead ends: 336 [2022-11-20 11:15:38,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 52 SyntacticMatches, 19 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=928, Invalid=4184, Unknown=0, NotChecked=0, Total=5112 [2022-11-20 11:15:38,687 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 251 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:38,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 254 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-20 11:15:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 61. [2022-11-20 11:15:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-20 11:15:38,767 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2022-11-20 11:15:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:38,768 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-20 11:15:38,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:38,768 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-20 11:15:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:15:38,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:38,768 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:38,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-20 11:15:38,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-11-20 11:15:38,971 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:38,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1081852893, now seen corresponding path program 8 times [2022-11-20 11:15:38,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:38,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643798931] [2022-11-20 11:15:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:38,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:39,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:39,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643798931] [2022-11-20 11:15:39,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643798931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:39,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44855996] [2022-11-20 11:15:39,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:15:39,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:39,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:39,267 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:39,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-20 11:15:39,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:15:39,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:39,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:39,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:39,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:39,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44855996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:39,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:39,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2022-11-20 11:15:39,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095089993] [2022-11-20 11:15:39,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:39,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 11:15:39,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 11:15:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 11:15:39,971 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:41,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:41,184 INFO L93 Difference]: Finished difference Result 400 states and 421 transitions. [2022-11-20 11:15:41,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 11:15:41,184 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-20 11:15:41,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:41,185 INFO L225 Difference]: With dead ends: 400 [2022-11-20 11:15:41,185 INFO L226 Difference]: Without dead ends: 369 [2022-11-20 11:15:41,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 53 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 11:15:41,186 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 334 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:41,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 180 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-20 11:15:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 63. [2022-11-20 11:15:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-11-20 11:15:41,265 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 43 [2022-11-20 11:15:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:41,265 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-11-20 11:15:41,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-11-20 11:15:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 11:15:41,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:41,265 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:41,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-20 11:15:41,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-20 11:15:41,466 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:41,466 INFO L85 PathProgramCache]: Analyzing trace with hash 105717207, now seen corresponding path program 16 times [2022-11-20 11:15:41,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:41,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395611601] [2022-11-20 11:15:41,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:41,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:41,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:41,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395611601] [2022-11-20 11:15:41,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395611601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:41,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326872706] [2022-11-20 11:15:41,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:15:41,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:41,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:41,651 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:41,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-20 11:15:41,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:15:41,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:41,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:15:41,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:41,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:41,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326872706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:41,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:41,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2022-11-20 11:15:41,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172066551] [2022-11-20 11:15:41,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:41,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:15:41,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:41,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:15:41,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:15:41,936 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:42,259 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-11-20 11:15:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:15:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 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 44 [2022-11-20 11:15:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:42,260 INFO L225 Difference]: With dead ends: 74 [2022-11-20 11:15:42,260 INFO L226 Difference]: Without dead ends: 72 [2022-11-20 11:15:42,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 18 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:15:42,260 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:42,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 154 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-20 11:15:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2022-11-20 11:15:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-11-20 11:15:42,340 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 44 [2022-11-20 11:15:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:42,340 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-11-20 11:15:42,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:42,340 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-11-20 11:15:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:15:42,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:42,341 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:42,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-20 11:15:42,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-20 11:15:42,541 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:42,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:42,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1215128889, now seen corresponding path program 17 times [2022-11-20 11:15:42,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:42,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691210903] [2022-11-20 11:15:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:42,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:42,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:42,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691210903] [2022-11-20 11:15:42,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691210903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:42,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902951621] [2022-11-20 11:15:42,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:15:42,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:42,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:42,890 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:42,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-20 11:15:42,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-20 11:15:42,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:42,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:15:42,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:43,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:43,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902951621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:43,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:43,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-20 11:15:43,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247255789] [2022-11-20 11:15:43,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:43,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:15:43,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:43,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:15:43,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 11:15:43,914 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:44,658 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2022-11-20 11:15:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:15:44,658 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 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 47 [2022-11-20 11:15:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:44,659 INFO L225 Difference]: With dead ends: 142 [2022-11-20 11:15:44,659 INFO L226 Difference]: Without dead ends: 108 [2022-11-20 11:15:44,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 49 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=950, Invalid=4020, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 11:15:44,660 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 91 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:44,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 165 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:15:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-20 11:15:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2022-11-20 11:15:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-20 11:15:44,762 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-20 11:15:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:44,762 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-20 11:15:44,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-20 11:15:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:15:44,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:44,763 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:44,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-20 11:15:44,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:44,963 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:44,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:44,963 INFO L85 PathProgramCache]: Analyzing trace with hash -185630472, now seen corresponding path program 29 times [2022-11-20 11:15:44,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:44,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604174571] [2022-11-20 11:15:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:44,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:45,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:45,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604174571] [2022-11-20 11:15:45,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604174571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:45,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295248019] [2022-11-20 11:15:45,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:15:45,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:45,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:45,311 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:45,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-20 11:15:45,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-20 11:15:45,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:45,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:15:45,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:45,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:46,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295248019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:46,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:46,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2022-11-20 11:15:46,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592109250] [2022-11-20 11:15:46,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:46,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:15:46,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:46,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:15:46,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:15:46,276 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:47,305 INFO L93 Difference]: Finished difference Result 183 states and 197 transitions. [2022-11-20 11:15:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 11:15:47,305 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 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 47 [2022-11-20 11:15:47,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:47,305 INFO L225 Difference]: With dead ends: 183 [2022-11-20 11:15:47,305 INFO L226 Difference]: Without dead ends: 149 [2022-11-20 11:15:47,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 50 SyntacticMatches, 21 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1114, Invalid=5048, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 11:15:47,306 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:47,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 215 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-20 11:15:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2022-11-20 11:15:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-20 11:15:47,431 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-20 11:15:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:47,432 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-20 11:15:47,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-20 11:15:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:15:47,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:47,432 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:47,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-11-20 11:15:47,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-20 11:15:47,633 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1477742247, now seen corresponding path program 30 times [2022-11-20 11:15:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:47,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951628460] [2022-11-20 11:15:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:47,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:47,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:47,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951628460] [2022-11-20 11:15:47,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951628460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:47,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926972691] [2022-11-20 11:15:47,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:15:47,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:47,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:47,948 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:47,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-20 11:15:48,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-20 11:15:48,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:48,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:15:48,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:48,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:48,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926972691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:48,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:48,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2022-11-20 11:15:48,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424664280] [2022-11-20 11:15:48,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:48,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 11:15:48,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:48,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 11:15:48,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 11:15:48,905 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:50,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:50,124 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2022-11-20 11:15:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-20 11:15:50,124 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 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 47 [2022-11-20 11:15:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:50,125 INFO L225 Difference]: With dead ends: 223 [2022-11-20 11:15:50,125 INFO L226 Difference]: Without dead ends: 189 [2022-11-20 11:15:50,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 51 SyntacticMatches, 21 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1266, Invalid=5874, Unknown=0, NotChecked=0, Total=7140 [2022-11-20 11:15:50,126 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 129 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:50,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 232 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:50,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-20 11:15:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 67. [2022-11-20 11:15:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-20 11:15:50,217 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-20 11:15:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:50,217 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-20 11:15:50,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-20 11:15:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:15:50,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:50,218 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:50,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-20 11:15:50,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:50,418 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:50,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1519423272, now seen corresponding path program 31 times [2022-11-20 11:15:50,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:50,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145066453] [2022-11-20 11:15:50,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:50,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:50,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:50,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145066453] [2022-11-20 11:15:50,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145066453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:50,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075531745] [2022-11-20 11:15:50,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:15:50,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:50,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:50,742 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:50,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-20 11:15:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:50,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:15:50,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:51,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:51,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075531745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:51,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:51,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 46 [2022-11-20 11:15:51,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73541258] [2022-11-20 11:15:51,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:51,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 11:15:51,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:51,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 11:15:51,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1700, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 11:15:51,692 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:53,136 INFO L93 Difference]: Finished difference Result 262 states and 278 transitions. [2022-11-20 11:15:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 11:15:53,136 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 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 47 [2022-11-20 11:15:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:53,137 INFO L225 Difference]: With dead ends: 262 [2022-11-20 11:15:53,138 INFO L226 Difference]: Without dead ends: 228 [2022-11-20 11:15:53,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 52 SyntacticMatches, 21 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1377, Invalid=6455, Unknown=0, NotChecked=0, Total=7832 [2022-11-20 11:15:53,139 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 171 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:53,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 257 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-20 11:15:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 67. [2022-11-20 11:15:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-20 11:15:53,255 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-20 11:15:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:53,255 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-20 11:15:53,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-20 11:15:53,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:15:53,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:53,256 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:53,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-11-20 11:15:53,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:53,456 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:53,456 INFO L85 PathProgramCache]: Analyzing trace with hash 834536825, now seen corresponding path program 32 times [2022-11-20 11:15:53,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:53,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713598755] [2022-11-20 11:15:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:53,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:53,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:53,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713598755] [2022-11-20 11:15:53,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713598755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:53,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901872049] [2022-11-20 11:15:53,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:15:53,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:53,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:53,801 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:53,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-20 11:15:53,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:15:53,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:15:53,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:54,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:54,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901872049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:54,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:54,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2022-11-20 11:15:54,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25971930] [2022-11-20 11:15:54,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:54,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 11:15:54,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:54,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 11:15:54,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 11:15:54,712 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:56,274 INFO L93 Difference]: Finished difference Result 300 states and 317 transitions. [2022-11-20 11:15:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 11:15:56,274 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 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 47 [2022-11-20 11:15:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:56,275 INFO L225 Difference]: With dead ends: 300 [2022-11-20 11:15:56,275 INFO L226 Difference]: Without dead ends: 266 [2022-11-20 11:15:56,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 53 SyntacticMatches, 21 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1435, Invalid=6755, Unknown=0, NotChecked=0, Total=8190 [2022-11-20 11:15:56,276 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 246 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:56,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 256 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-20 11:15:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 67. [2022-11-20 11:15:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-20 11:15:56,379 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-20 11:15:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:56,379 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-20 11:15:56,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-20 11:15:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:15:56,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:56,380 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:56,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:56,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-20 11:15:56,585 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:56,585 INFO L85 PathProgramCache]: Analyzing trace with hash -890644296, now seen corresponding path program 33 times [2022-11-20 11:15:56,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:56,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690088056] [2022-11-20 11:15:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:56,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:56,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:15:56,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690088056] [2022-11-20 11:15:56,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690088056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:15:56,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20398223] [2022-11-20 11:15:56,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:15:56,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:15:56,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:15:56,904 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:15:56,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-20 11:15:56,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-20 11:15:56,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:56,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:15:56,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:57,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:57,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20398223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:57,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:15:57,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2022-11-20 11:15:57,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864245161] [2022-11-20 11:15:57,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:57,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 11:15:57,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:15:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 11:15:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 11:15:57,818 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:59,468 INFO L93 Difference]: Finished difference Result 337 states and 355 transitions. [2022-11-20 11:15:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 11:15:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 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 47 [2022-11-20 11:15:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:59,469 INFO L225 Difference]: With dead ends: 337 [2022-11-20 11:15:59,469 INFO L226 Difference]: Without dead ends: 303 [2022-11-20 11:15:59,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 54 SyntacticMatches, 21 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3336 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1434, Invalid=6756, Unknown=0, NotChecked=0, Total=8190 [2022-11-20 11:15:59,470 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 267 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:59,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 236 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-20 11:15:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 67. [2022-11-20 11:15:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-20 11:15:59,581 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-20 11:15:59,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:59,581 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-20 11:15:59,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:59,581 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-20 11:15:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:15:59,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:59,582 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:59,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:59,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-20 11:15:59,783 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:15:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:59,783 INFO L85 PathProgramCache]: Analyzing trace with hash 23536025, now seen corresponding path program 34 times [2022-11-20 11:15:59,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:15:59,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898857148] [2022-11-20 11:15:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:59,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:15:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:00,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:00,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898857148] [2022-11-20 11:16:00,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898857148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:00,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826523926] [2022-11-20 11:16:00,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:16:00,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:00,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:00,138 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:00,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-20 11:16:00,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:16:00,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:00,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:16:00,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:00,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:01,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826523926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:01,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:01,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2022-11-20 11:16:01,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887061857] [2022-11-20 11:16:01,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:01,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 11:16:01,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:01,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 11:16:01,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:16:01,035 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:02,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:02,749 INFO L93 Difference]: Finished difference Result 373 states and 392 transitions. [2022-11-20 11:16:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 11:16:02,749 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 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 47 [2022-11-20 11:16:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:02,751 INFO L225 Difference]: With dead ends: 373 [2022-11-20 11:16:02,751 INFO L226 Difference]: Without dead ends: 339 [2022-11-20 11:16:02,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 21 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1374, Invalid=6458, Unknown=0, NotChecked=0, Total=7832 [2022-11-20 11:16:02,751 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 269 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:02,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 247 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:02,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-20 11:16:02,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 67. [2022-11-20 11:16:02,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-20 11:16:02,875 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-20 11:16:02,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:02,875 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-20 11:16:02,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:02,875 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-20 11:16:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:16:02,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:02,875 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:02,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-20 11:16:03,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:03,076 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:03,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash -778258280, now seen corresponding path program 35 times [2022-11-20 11:16:03,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:03,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194762806] [2022-11-20 11:16:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:03,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:03,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:03,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194762806] [2022-11-20 11:16:03,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194762806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:03,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777851233] [2022-11-20 11:16:03,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:16:03,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:03,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:03,429 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:03,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-20 11:16:03,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-20 11:16:03,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:03,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:16:03,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:04,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:04,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777851233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:04,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:04,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2022-11-20 11:16:04,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811311458] [2022-11-20 11:16:04,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:04,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 11:16:04,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:04,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 11:16:04,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 11:16:04,351 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:06,090 INFO L93 Difference]: Finished difference Result 408 states and 428 transitions. [2022-11-20 11:16:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 11:16:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 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 47 [2022-11-20 11:16:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:06,091 INFO L225 Difference]: With dead ends: 408 [2022-11-20 11:16:06,092 INFO L226 Difference]: Without dead ends: 374 [2022-11-20 11:16:06,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 21 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1261, Invalid=5879, Unknown=0, NotChecked=0, Total=7140 [2022-11-20 11:16:06,092 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 287 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:06,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 265 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-20 11:16:06,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 67. [2022-11-20 11:16:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-20 11:16:06,213 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-20 11:16:06,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:06,213 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-20 11:16:06,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 42 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-20 11:16:06,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:16:06,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:06,214 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:06,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-20 11:16:06,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:06,414 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:06,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:06,414 INFO L85 PathProgramCache]: Analyzing trace with hash 719898041, now seen corresponding path program 36 times [2022-11-20 11:16:06,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:06,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217767987] [2022-11-20 11:16:06,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:06,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:06,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:06,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217767987] [2022-11-20 11:16:06,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217767987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:06,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815438185] [2022-11-20 11:16:06,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:16:06,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:06,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:06,718 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:06,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-20 11:16:06,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-20 11:16:06,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:06,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:16:06,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:07,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:07,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815438185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:07,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:07,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2022-11-20 11:16:07,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111371218] [2022-11-20 11:16:07,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:07,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:16:07,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:07,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:16:07,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:16:07,536 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:09,320 INFO L93 Difference]: Finished difference Result 442 states and 463 transitions. [2022-11-20 11:16:09,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 11:16:09,320 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 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 47 [2022-11-20 11:16:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:09,322 INFO L225 Difference]: With dead ends: 442 [2022-11-20 11:16:09,322 INFO L226 Difference]: Without dead ends: 408 [2022-11-20 11:16:09,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 57 SyntacticMatches, 21 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2389 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1107, Invalid=5055, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 11:16:09,323 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 338 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:09,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 236 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:09,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-20 11:16:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 67. [2022-11-20 11:16:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-11-20 11:16:09,432 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2022-11-20 11:16:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:09,433 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-11-20 11:16:09,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:09,433 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-11-20 11:16:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 11:16:09,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:09,433 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:09,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-20 11:16:09,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-11-20 11:16:09,635 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:09,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:09,635 INFO L85 PathProgramCache]: Analyzing trace with hash 491131000, now seen corresponding path program 9 times [2022-11-20 11:16:09,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:09,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443311950] [2022-11-20 11:16:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:09,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:09,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:09,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443311950] [2022-11-20 11:16:09,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443311950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:09,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974655614] [2022-11-20 11:16:09,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:16:09,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:09,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:09,979 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:09,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-20 11:16:10,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-20 11:16:10,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:10,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:16:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:10,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:10,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974655614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:10,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:10,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2022-11-20 11:16:10,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068266629] [2022-11-20 11:16:10,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:10,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 11:16:10,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:10,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 11:16:10,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:16:10,832 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:12,607 INFO L93 Difference]: Finished difference Result 478 states and 501 transitions. [2022-11-20 11:16:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-20 11:16:12,607 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-20 11:16:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:12,609 INFO L225 Difference]: With dead ends: 478 [2022-11-20 11:16:12,609 INFO L226 Difference]: Without dead ends: 444 [2022-11-20 11:16:12,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=941, Invalid=4029, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 11:16:12,610 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 438 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:12,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 211 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-11-20 11:16:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 69. [2022-11-20 11:16:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2022-11-20 11:16:12,744 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 47 [2022-11-20 11:16:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:12,745 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2022-11-20 11:16:12,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 40 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2022-11-20 11:16:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 11:16:12,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:12,746 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:12,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-11-20 11:16:12,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:12,946 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:12,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1809280333, now seen corresponding path program 18 times [2022-11-20 11:16:12,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:12,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817386625] [2022-11-20 11:16:12,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:12,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:13,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:13,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817386625] [2022-11-20 11:16:13,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817386625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:13,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737908487] [2022-11-20 11:16:13,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:16:13,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:13,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:13,142 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:13,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-20 11:16:13,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-20 11:16:13,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:13,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:13,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:13,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:13,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737908487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:13,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:13,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2022-11-20 11:16:13,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96561501] [2022-11-20 11:16:13,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:13,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:16:13,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:13,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:16:13,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:16:13,444 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:13,881 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-11-20 11:16:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:16:13,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 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 48 [2022-11-20 11:16:13,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:13,882 INFO L225 Difference]: With dead ends: 80 [2022-11-20 11:16:13,882 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 11:16:13,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 20 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:16:13,883 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 92 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:13,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 182 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:16:13,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 11:16:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-11-20 11:16:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 71 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2022-11-20 11:16:13,999 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 48 [2022-11-20 11:16:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:13,999 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2022-11-20 11:16:13,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2022-11-20 11:16:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:16:14,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:14,000 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:14,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-11-20 11:16:14,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:14,203 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:14,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1574007517, now seen corresponding path program 19 times [2022-11-20 11:16:14,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:14,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504411664] [2022-11-20 11:16:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:14,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:14,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:14,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504411664] [2022-11-20 11:16:14,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504411664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:14,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936700732] [2022-11-20 11:16:14,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:16:14,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:14,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:14,682 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:14,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-20 11:16:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:14,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:15,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:15,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936700732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:15,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:15,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-11-20 11:16:15,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361263133] [2022-11-20 11:16:15,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:15,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:16:15,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:15,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:16:15,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=2229, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:16:15,844 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:16,793 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2022-11-20 11:16:16,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:16:16,794 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 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 51 [2022-11-20 11:16:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:16,794 INFO L225 Difference]: With dead ends: 155 [2022-11-20 11:16:16,795 INFO L226 Difference]: Without dead ends: 118 [2022-11-20 11:16:16,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 53 SyntacticMatches, 23 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1107, Invalid=4745, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 11:16:16,796 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:16,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 188 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:16:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-20 11:16:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2022-11-20 11:16:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-20 11:16:16,930 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-20 11:16:16,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:16,930 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-20 11:16:16,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-20 11:16:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:16:16,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:16,931 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:16,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-11-20 11:16:17,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-11-20 11:16:17,131 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:17,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2142136548, now seen corresponding path program 37 times [2022-11-20 11:16:17,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:17,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420353995] [2022-11-20 11:16:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:17,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:17,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:17,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420353995] [2022-11-20 11:16:17,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420353995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:17,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245086901] [2022-11-20 11:16:17,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:16:17,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:17,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:17,486 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:17,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-20 11:16:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:17,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:17,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:18,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:18,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245086901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:18,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:18,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 52 [2022-11-20 11:16:18,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719121264] [2022-11-20 11:16:18,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:18,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 11:16:18,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:18,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 11:16:18,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2159, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 11:16:18,731 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:20,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:20,038 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2022-11-20 11:16:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 11:16:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 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 51 [2022-11-20 11:16:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:20,038 INFO L225 Difference]: With dead ends: 200 [2022-11-20 11:16:20,038 INFO L226 Difference]: Without dead ends: 163 [2022-11-20 11:16:20,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 54 SyntacticMatches, 23 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3388 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1310, Invalid=6000, Unknown=0, NotChecked=0, Total=7310 [2022-11-20 11:16:20,039 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:20,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 215 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:20,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-20 11:16:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 73. [2022-11-20 11:16:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-20 11:16:20,174 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-20 11:16:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:20,174 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-20 11:16:20,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 52 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:20,174 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-20 11:16:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:16:20,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:20,175 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:20,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:20,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:20,375 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:20,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:20,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2032955133, now seen corresponding path program 38 times [2022-11-20 11:16:20,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:20,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776524574] [2022-11-20 11:16:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:20,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:20,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776524574] [2022-11-20 11:16:20,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776524574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133768667] [2022-11-20 11:16:20,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:16:20,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:20,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:20,732 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:20,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-20 11:16:20,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:16:20,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:20,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:20,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:21,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:21,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133768667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:21,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:21,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 51 [2022-11-20 11:16:21,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461899439] [2022-11-20 11:16:21,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:21,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 11:16:21,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:21,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 11:16:21,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=2087, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 11:16:21,806 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:23,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:23,516 INFO L93 Difference]: Finished difference Result 244 states and 260 transitions. [2022-11-20 11:16:23,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 11:16:23,517 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 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 51 [2022-11-20 11:16:23,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:23,517 INFO L225 Difference]: With dead ends: 244 [2022-11-20 11:16:23,517 INFO L226 Difference]: Without dead ends: 207 [2022-11-20 11:16:23,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 55 SyntacticMatches, 23 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3777 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1505, Invalid=7051, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 11:16:23,518 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 200 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:23,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 280 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-20 11:16:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 73. [2022-11-20 11:16:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-20 11:16:23,710 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-20 11:16:23,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:23,710 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-20 11:16:23,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:23,710 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-20 11:16:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:16:23,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:23,711 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:23,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-11-20 11:16:23,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-11-20 11:16:23,911 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash 227972860, now seen corresponding path program 39 times [2022-11-20 11:16:23,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:23,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544678479] [2022-11-20 11:16:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:23,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:24,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:24,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544678479] [2022-11-20 11:16:24,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544678479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325768194] [2022-11-20 11:16:24,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:16:24,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:24,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:24,314 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:24,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-20 11:16:24,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-20 11:16:24,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:24,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:24,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:25,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:25,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325768194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:25,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:25,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 50 [2022-11-20 11:16:25,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058574118] [2022-11-20 11:16:25,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:25,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 11:16:25,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:25,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 11:16:25,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 11:16:25,362 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:27,290 INFO L93 Difference]: Finished difference Result 287 states and 304 transitions. [2022-11-20 11:16:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-20 11:16:27,291 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 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 51 [2022-11-20 11:16:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:27,291 INFO L225 Difference]: With dead ends: 287 [2022-11-20 11:16:27,291 INFO L226 Difference]: Without dead ends: 250 [2022-11-20 11:16:27,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 56 SyntacticMatches, 23 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1659, Invalid=7847, Unknown=0, NotChecked=0, Total=9506 [2022-11-20 11:16:27,292 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 188 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:27,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 258 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-20 11:16:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 73. [2022-11-20 11:16:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-20 11:16:27,474 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-20 11:16:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:27,475 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-20 11:16:27,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 50 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-20 11:16:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:16:27,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:27,475 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:27,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-20 11:16:27,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-11-20 11:16:27,676 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash -245894371, now seen corresponding path program 40 times [2022-11-20 11:16:27,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:27,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183626949] [2022-11-20 11:16:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:27,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:28,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:28,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183626949] [2022-11-20 11:16:28,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183626949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:28,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157417154] [2022-11-20 11:16:28,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:16:28,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:28,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:28,083 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:28,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-20 11:16:28,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:16:28,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:28,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:28,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:28,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:29,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157417154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:29,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:29,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2022-11-20 11:16:29,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468315754] [2022-11-20 11:16:29,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:29,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:16:29,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:16:29,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 11:16:29,269 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:31,882 INFO L93 Difference]: Finished difference Result 329 states and 347 transitions. [2022-11-20 11:16:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-20 11:16:31,882 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 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 51 [2022-11-20 11:16:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:31,883 INFO L225 Difference]: With dead ends: 329 [2022-11-20 11:16:31,883 INFO L226 Difference]: Without dead ends: 292 [2022-11-20 11:16:31,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 57 SyntacticMatches, 23 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1757, Invalid=8343, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 11:16:31,884 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 233 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:31,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 302 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:31,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-11-20 11:16:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 73. [2022-11-20 11:16:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-20 11:16:32,129 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-20 11:16:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:32,130 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-20 11:16:32,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-20 11:16:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:16:32,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:32,131 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:32,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:32,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-20 11:16:32,336 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1646653732, now seen corresponding path program 41 times [2022-11-20 11:16:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:32,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68261727] [2022-11-20 11:16:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:32,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 127 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:32,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:32,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68261727] [2022-11-20 11:16:32,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68261727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:32,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226565515] [2022-11-20 11:16:32,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:16:32,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:32,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:32,694 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:32,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-20 11:16:32,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-20 11:16:32,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:32,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:32,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:33,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:33,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226565515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:33,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:33,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 48 [2022-11-20 11:16:33,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841816315] [2022-11-20 11:16:33,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:33,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:16:33,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:33,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:16:33,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:16:33,892 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:36,164 INFO L93 Difference]: Finished difference Result 370 states and 389 transitions. [2022-11-20 11:16:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-20 11:16:36,164 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 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 51 [2022-11-20 11:16:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:36,165 INFO L225 Difference]: With dead ends: 370 [2022-11-20 11:16:36,165 INFO L226 Difference]: Without dead ends: 333 [2022-11-20 11:16:36,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 58 SyntacticMatches, 23 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1790, Invalid=8512, Unknown=0, NotChecked=0, Total=10302 [2022-11-20 11:16:36,166 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 314 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:36,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 270 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-20 11:16:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 73. [2022-11-20 11:16:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-20 11:16:36,351 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-20 11:16:36,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:36,352 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-20 11:16:36,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-20 11:16:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:16:36,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:36,352 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:36,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-11-20 11:16:36,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:36,553 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:36,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1356201789, now seen corresponding path program 42 times [2022-11-20 11:16:36,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:36,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870597670] [2022-11-20 11:16:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:36,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:36,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:36,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870597670] [2022-11-20 11:16:36,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870597670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:36,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842998758] [2022-11-20 11:16:36,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:16:36,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:36,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:36,965 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:36,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-20 11:16:37,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-20 11:16:37,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:37,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:37,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:37,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:38,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842998758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:38,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:38,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 47 [2022-11-20 11:16:38,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934172271] [2022-11-20 11:16:38,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:38,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 11:16:38,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:38,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 11:16:38,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 11:16:38,106 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:40,672 INFO L93 Difference]: Finished difference Result 410 states and 430 transitions. [2022-11-20 11:16:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 11:16:40,673 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 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 51 [2022-11-20 11:16:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:40,673 INFO L225 Difference]: With dead ends: 410 [2022-11-20 11:16:40,674 INFO L226 Difference]: Without dead ends: 373 [2022-11-20 11:16:40,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 59 SyntacticMatches, 23 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4134 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1755, Invalid=8345, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 11:16:40,675 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 293 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:40,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 238 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-20 11:16:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 73. [2022-11-20 11:16:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-20 11:16:40,891 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-20 11:16:40,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:40,891 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-20 11:16:40,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-20 11:16:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:16:40,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:40,892 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:40,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-11-20 11:16:41,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-11-20 11:16:41,093 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:41,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1314520764, now seen corresponding path program 43 times [2022-11-20 11:16:41,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:41,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905947372] [2022-11-20 11:16:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:41,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:41,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:41,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905947372] [2022-11-20 11:16:41,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905947372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:41,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090301745] [2022-11-20 11:16:41,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:16:41,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:41,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:41,508 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:41,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-20 11:16:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:41,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:41,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:42,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:42,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090301745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:42,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:42,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 46 [2022-11-20 11:16:42,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228496547] [2022-11-20 11:16:42,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:42,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 11:16:42,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:42,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 11:16:42,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 11:16:42,471 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:44,809 INFO L93 Difference]: Finished difference Result 449 states and 470 transitions. [2022-11-20 11:16:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-20 11:16:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 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 51 [2022-11-20 11:16:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:44,810 INFO L225 Difference]: With dead ends: 449 [2022-11-20 11:16:44,811 INFO L226 Difference]: Without dead ends: 412 [2022-11-20 11:16:44,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 60 SyntacticMatches, 23 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3857 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1655, Invalid=7851, Unknown=0, NotChecked=0, Total=9506 [2022-11-20 11:16:44,811 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 417 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:44,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 281 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-11-20 11:16:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 73. [2022-11-20 11:16:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-20 11:16:44,977 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-20 11:16:44,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:44,977 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-20 11:16:44,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:44,977 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-20 11:16:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:16:44,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:44,977 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:44,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-20 11:16:45,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:45,178 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:45,178 INFO L85 PathProgramCache]: Analyzing trace with hash -626486435, now seen corresponding path program 44 times [2022-11-20 11:16:45,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:45,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026375941] [2022-11-20 11:16:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:45,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:45,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:45,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026375941] [2022-11-20 11:16:45,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026375941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:45,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830201481] [2022-11-20 11:16:45,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:16:45,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:45,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:45,508 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:45,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-20 11:16:45,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:16:45,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:45,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:45,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:46,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:46,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830201481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:46,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:46,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2022-11-20 11:16:46,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370510722] [2022-11-20 11:16:46,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:46,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 11:16:46,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:46,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 11:16:46,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 11:16:46,452 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:48,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:48,907 INFO L93 Difference]: Finished difference Result 487 states and 509 transitions. [2022-11-20 11:16:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-20 11:16:48,907 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 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 51 [2022-11-20 11:16:48,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:48,908 INFO L225 Difference]: With dead ends: 487 [2022-11-20 11:16:48,908 INFO L226 Difference]: Without dead ends: 450 [2022-11-20 11:16:48,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 61 SyntacticMatches, 23 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3435 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1499, Invalid=7057, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 11:16:48,909 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 404 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:48,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 323 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:48,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-20 11:16:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 73. [2022-11-20 11:16:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-20 11:16:49,085 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-20 11:16:49,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:49,085 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-20 11:16:49,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-20 11:16:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:16:49,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:49,086 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:49,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-11-20 11:16:49,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:49,286 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:49,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:49,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1943299740, now seen corresponding path program 45 times [2022-11-20 11:16:49,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:49,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276747319] [2022-11-20 11:16:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:49,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:49,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:49,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276747319] [2022-11-20 11:16:49,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276747319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:49,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378205577] [2022-11-20 11:16:49,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:16:49,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:49,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:49,621 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:49,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-20 11:16:49,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-20 11:16:49,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:49,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:49,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:50,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:50,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378205577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:50,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:50,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2022-11-20 11:16:50,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337791470] [2022-11-20 11:16:50,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:50,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 11:16:50,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:50,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 11:16:50,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 11:16:50,557 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:53,006 INFO L93 Difference]: Finished difference Result 524 states and 547 transitions. [2022-11-20 11:16:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-20 11:16:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 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 51 [2022-11-20 11:16:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:53,007 INFO L225 Difference]: With dead ends: 524 [2022-11-20 11:16:53,007 INFO L226 Difference]: Without dead ends: 487 [2022-11-20 11:16:53,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 62 SyntacticMatches, 23 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1302, Invalid=6008, Unknown=0, NotChecked=0, Total=7310 [2022-11-20 11:16:53,008 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 453 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:53,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 287 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:53,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-20 11:16:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 73. [2022-11-20 11:16:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-20 11:16:53,180 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2022-11-20 11:16:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:53,180 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-20 11:16:53,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-20 11:16:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 11:16:53,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:53,181 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:53,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-11-20 11:16:53,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-11-20 11:16:53,381 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:53,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:53,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1437487235, now seen corresponding path program 10 times [2022-11-20 11:16:53,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:53,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166194703] [2022-11-20 11:16:53,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:53,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:53,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:53,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166194703] [2022-11-20 11:16:53,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166194703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:53,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469034705] [2022-11-20 11:16:53,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:16:53,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:53,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:53,718 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:53,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-20 11:16:53,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:16:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:53,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:53,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:54,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:54,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469034705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:54,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:54,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 43 [2022-11-20 11:16:54,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32755856] [2022-11-20 11:16:54,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:54,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 11:16:54,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:54,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 11:16:54,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1439, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:16:54,645 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:57,009 INFO L93 Difference]: Finished difference Result 563 states and 588 transitions. [2022-11-20 11:16:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 11:16:57,010 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 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 51 [2022-11-20 11:16:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:57,011 INFO L225 Difference]: With dead ends: 563 [2022-11-20 11:16:57,011 INFO L226 Difference]: Without dead ends: 526 [2022-11-20 11:16:57,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 63 SyntacticMatches, 23 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1097, Invalid=4755, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 11:16:57,011 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 364 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:57,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 266 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:16:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-11-20 11:16:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 75. [2022-11-20 11:16:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2022-11-20 11:16:57,195 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 51 [2022-11-20 11:16:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:57,195 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2022-11-20 11:16:57,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2022-11-20 11:16:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 11:16:57,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:57,196 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:57,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-11-20 11:16:57,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:57,397 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:57,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash -723168425, now seen corresponding path program 20 times [2022-11-20 11:16:57,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:57,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233059851] [2022-11-20 11:16:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:57,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:57,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:57,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233059851] [2022-11-20 11:16:57,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233059851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:57,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125568351] [2022-11-20 11:16:57,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:16:57,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:57,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:57,584 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:57,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-20 11:16:57,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:16:57,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:57,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:16:57,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:57,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:57,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125568351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:57,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:16:57,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2022-11-20 11:16:57,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232996489] [2022-11-20 11:16:57,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:57,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:16:57,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:16:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:16:57,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:16:57,916 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:58,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:58,461 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-11-20 11:16:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 11:16:58,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 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 52 [2022-11-20 11:16:58,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:58,462 INFO L225 Difference]: With dead ends: 86 [2022-11-20 11:16:58,462 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 11:16:58,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 90 SyntacticMatches, 22 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:16:58,463 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 100 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:58,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 168 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:16:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 11:16:58,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2022-11-20 11:16:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2022-11-20 11:16:58,646 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 52 [2022-11-20 11:16:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:58,646 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2022-11-20 11:16:58,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2022-11-20 11:16:58,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:16:58,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:58,647 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:58,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:58,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:58,853 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:16:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash -349749319, now seen corresponding path program 21 times [2022-11-20 11:16:58,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:16:58,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636929879] [2022-11-20 11:16:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:58,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:16:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:59,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:16:59,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636929879] [2022-11-20 11:16:59,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636929879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:16:59,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454694748] [2022-11-20 11:16:59,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:16:59,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:16:59,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:16:59,289 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:16:59,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-20 11:16:59,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-20 11:16:59,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:59,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:16:59,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:00,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:00,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454694748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:00,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:00,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-11-20 11:17:00,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763352855] [2022-11-20 11:17:00,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:00,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-20 11:17:00,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:00,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-20 11:17:00,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=2583, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 11:17:00,558 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:01,734 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2022-11-20 11:17:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 11:17:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 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 55 [2022-11-20 11:17:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:01,735 INFO L225 Difference]: With dead ends: 168 [2022-11-20 11:17:01,735 INFO L226 Difference]: Without dead ends: 128 [2022-11-20 11:17:01,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 57 SyntacticMatches, 25 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3462 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1276, Invalid=5530, Unknown=0, NotChecked=0, Total=6806 [2022-11-20 11:17:01,735 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:01,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 218 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-20 11:17:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2022-11-20 11:17:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-20 11:17:01,958 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-20 11:17:01,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:01,958 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-20 11:17:01,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-20 11:17:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:17:01,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:01,959 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:01,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-11-20 11:17:02,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-11-20 11:17:02,163 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:02,163 INFO L85 PathProgramCache]: Analyzing trace with hash -865260424, now seen corresponding path program 46 times [2022-11-20 11:17:02,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:02,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851649127] [2022-11-20 11:17:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:02,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:02,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:02,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851649127] [2022-11-20 11:17:02,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851649127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:02,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140962907] [2022-11-20 11:17:02,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:17:02,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:02,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:02,566 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:02,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-20 11:17:02,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:17:02,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:17:02,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:03,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:03,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140962907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:03,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:03,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2022-11-20 11:17:03,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953464068] [2022-11-20 11:17:03,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:03,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 11:17:03,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:03,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 11:17:03,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=2508, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 11:17:03,818 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:05,419 INFO L93 Difference]: Finished difference Result 217 states and 233 transitions. [2022-11-20 11:17:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 11:17:05,419 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 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 55 [2022-11-20 11:17:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:05,420 INFO L225 Difference]: With dead ends: 217 [2022-11-20 11:17:05,420 INFO L226 Difference]: Without dead ends: 177 [2022-11-20 11:17:05,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 25 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4016 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1522, Invalid=7034, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 11:17:05,420 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 129 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:05,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 227 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:05,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-20 11:17:05,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 79. [2022-11-20 11:17:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-20 11:17:05,628 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-20 11:17:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:05,628 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-20 11:17:05,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-20 11:17:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:17:05,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:05,629 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:05,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-11-20 11:17:05,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:05,830 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:05,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:05,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1436079143, now seen corresponding path program 47 times [2022-11-20 11:17:05,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:05,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636847074] [2022-11-20 11:17:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:05,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:06,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:06,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636847074] [2022-11-20 11:17:06,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636847074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:06,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598592335] [2022-11-20 11:17:06,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:17:06,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:06,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:06,225 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:06,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-20 11:17:06,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-20 11:17:06,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:06,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:17:06,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:07,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:07,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598592335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:07,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:07,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 55 [2022-11-20 11:17:07,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606632841] [2022-11-20 11:17:07,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:07,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 11:17:07,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:07,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 11:17:07,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2431, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 11:17:07,466 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:09,503 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2022-11-20 11:17:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 11:17:09,503 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 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 55 [2022-11-20 11:17:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:09,504 INFO L225 Difference]: With dead ends: 265 [2022-11-20 11:17:09,504 INFO L226 Difference]: Without dead ends: 225 [2022-11-20 11:17:09,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 59 SyntacticMatches, 25 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1765, Invalid=8335, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 11:17:09,505 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:09,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 304 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:09,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-20 11:17:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 79. [2022-11-20 11:17:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-20 11:17:09,757 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-20 11:17:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:09,757 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-20 11:17:09,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-20 11:17:09,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:17:09,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:09,758 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:09,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-11-20 11:17:09,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:09,958 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash 762264664, now seen corresponding path program 48 times [2022-11-20 11:17:09,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:09,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767872271] [2022-11-20 11:17:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:09,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:10,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:10,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767872271] [2022-11-20 11:17:10,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767872271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:10,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992838981] [2022-11-20 11:17:10,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:17:10,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:10,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:10,369 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:10,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-20 11:17:10,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-20 11:17:10,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:17:10,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:11,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:11,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992838981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:11,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:11,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 54 [2022-11-20 11:17:11,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936287559] [2022-11-20 11:17:11,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:11,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 11:17:11,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:11,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 11:17:11,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 11:17:11,619 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:14,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:14,050 INFO L93 Difference]: Finished difference Result 312 states and 330 transitions. [2022-11-20 11:17:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-20 11:17:14,050 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 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 55 [2022-11-20 11:17:14,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:14,051 INFO L225 Difference]: With dead ends: 312 [2022-11-20 11:17:14,051 INFO L226 Difference]: Without dead ends: 272 [2022-11-20 11:17:14,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 60 SyntacticMatches, 25 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4907 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1968, Invalid=9374, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 11:17:14,052 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 190 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:14,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 286 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-20 11:17:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 79. [2022-11-20 11:17:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-20 11:17:14,279 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-20 11:17:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:14,279 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-20 11:17:14,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-20 11:17:14,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:17:14,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:14,280 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:14,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-11-20 11:17:14,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2022-11-20 11:17:14,480 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:14,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1525915641, now seen corresponding path program 49 times [2022-11-20 11:17:14,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:14,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845265056] [2022-11-20 11:17:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:14,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:14,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:14,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845265056] [2022-11-20 11:17:14,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845265056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:14,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739671941] [2022-11-20 11:17:14,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:17:14,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:14,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:14,880 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:14,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-20 11:17:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:14,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:17:14,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:15,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:16,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739671941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:16,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:16,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2022-11-20 11:17:16,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413101133] [2022-11-20 11:17:16,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:16,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:17:16,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:16,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:17:16,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2271, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:17:16,054 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:18,742 INFO L93 Difference]: Finished difference Result 358 states and 377 transitions. [2022-11-20 11:17:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-20 11:17:18,742 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 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 55 [2022-11-20 11:17:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:18,743 INFO L225 Difference]: With dead ends: 358 [2022-11-20 11:17:18,743 INFO L226 Difference]: Without dead ends: 318 [2022-11-20 11:17:18,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 61 SyntacticMatches, 25 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5176 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2113, Invalid=10097, Unknown=0, NotChecked=0, Total=12210 [2022-11-20 11:17:18,744 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 325 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:18,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 331 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:18,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-20 11:17:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 79. [2022-11-20 11:17:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-20 11:17:18,977 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-20 11:17:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:18,977 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-20 11:17:18,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-20 11:17:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:17:18,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:18,978 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:18,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-11-20 11:17:19,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:19,179 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:19,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:19,179 INFO L85 PathProgramCache]: Analyzing trace with hash 2104738872, now seen corresponding path program 50 times [2022-11-20 11:17:19,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:19,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796330226] [2022-11-20 11:17:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:19,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:19,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:19,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796330226] [2022-11-20 11:17:19,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796330226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:19,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63755233] [2022-11-20 11:17:19,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:17:19,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:19,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:19,578 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:19,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-20 11:17:19,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:17:19,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:19,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:17:19,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:20,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:20,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63755233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:20,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:20,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 52 [2022-11-20 11:17:20,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058016836] [2022-11-20 11:17:20,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:20,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 11:17:20,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:20,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 11:17:20,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 11:17:20,731 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:23,719 INFO L93 Difference]: Finished difference Result 403 states and 423 transitions. [2022-11-20 11:17:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 11:17:23,719 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 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 55 [2022-11-20 11:17:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:23,719 INFO L225 Difference]: With dead ends: 403 [2022-11-20 11:17:23,720 INFO L226 Difference]: Without dead ends: 363 [2022-11-20 11:17:23,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 62 SyntacticMatches, 25 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5293 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2188, Invalid=10468, Unknown=0, NotChecked=0, Total=12656 [2022-11-20 11:17:23,720 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 287 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:23,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 300 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-20 11:17:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 79. [2022-11-20 11:17:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-20 11:17:23,968 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-20 11:17:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:23,968 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-20 11:17:23,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-20 11:17:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:17:23,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:23,969 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:23,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-11-20 11:17:24,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:24,170 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:24,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1984863257, now seen corresponding path program 51 times [2022-11-20 11:17:24,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:24,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647987246] [2022-11-20 11:17:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:24,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:24,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647987246] [2022-11-20 11:17:24,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647987246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590235750] [2022-11-20 11:17:24,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:17:24,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:24,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:24,559 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:24,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-20 11:17:24,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-20 11:17:24,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:24,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:17:24,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:25,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:25,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590235750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:25,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:25,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2022-11-20 11:17:25,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474899733] [2022-11-20 11:17:25,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:25,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 11:17:25,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:25,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 11:17:25,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2103, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 11:17:25,699 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:28,826 INFO L93 Difference]: Finished difference Result 447 states and 468 transitions. [2022-11-20 11:17:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-20 11:17:28,826 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 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 55 [2022-11-20 11:17:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:28,827 INFO L225 Difference]: With dead ends: 447 [2022-11-20 11:17:28,827 INFO L226 Difference]: Without dead ends: 407 [2022-11-20 11:17:28,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 63 SyntacticMatches, 25 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5244 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2187, Invalid=10469, Unknown=0, NotChecked=0, Total=12656 [2022-11-20 11:17:28,828 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 329 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:28,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 324 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-20 11:17:29,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 79. [2022-11-20 11:17:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:29,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-20 11:17:29,065 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-20 11:17:29,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:29,065 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-20 11:17:29,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:29,065 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-20 11:17:29,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:17:29,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:29,066 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:29,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-11-20 11:17:29,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:29,266 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:29,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:29,266 INFO L85 PathProgramCache]: Analyzing trace with hash 179880984, now seen corresponding path program 52 times [2022-11-20 11:17:29,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:29,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690930863] [2022-11-20 11:17:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:29,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:29,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690930863] [2022-11-20 11:17:29,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690930863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:29,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504045201] [2022-11-20 11:17:29,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:17:29,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:29,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:29,644 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:29,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-20 11:17:29,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:17:29,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:17:29,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:30,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:30,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504045201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:30,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:30,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 50 [2022-11-20 11:17:30,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825161932] [2022-11-20 11:17:30,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:30,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 11:17:30,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 11:17:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 11:17:30,746 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:34,044 INFO L93 Difference]: Finished difference Result 490 states and 512 transitions. [2022-11-20 11:17:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-20 11:17:34,044 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 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 55 [2022-11-20 11:17:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:34,045 INFO L225 Difference]: With dead ends: 490 [2022-11-20 11:17:34,045 INFO L226 Difference]: Without dead ends: 450 [2022-11-20 11:17:34,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 64 SyntacticMatches, 25 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2110, Invalid=10100, Unknown=0, NotChecked=0, Total=12210 [2022-11-20 11:17:34,046 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 355 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:34,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 290 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-20 11:17:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 79. [2022-11-20 11:17:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-20 11:17:34,312 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-20 11:17:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:34,312 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-20 11:17:34,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 50 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:34,313 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-20 11:17:34,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:17:34,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:34,313 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:34,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-11-20 11:17:34,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:34,515 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:34,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash -293986247, now seen corresponding path program 53 times [2022-11-20 11:17:34,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:34,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829518486] [2022-11-20 11:17:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:34,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:34,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829518486] [2022-11-20 11:17:34,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829518486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:34,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783033789] [2022-11-20 11:17:34,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:17:34,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:34,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:34,906 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:34,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-20 11:17:34,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-20 11:17:34,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:34,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:17:34,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:35,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:35,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783033789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:35,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:35,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 49 [2022-11-20 11:17:35,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798907336] [2022-11-20 11:17:35,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:35,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:17:35,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:35,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:17:35,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1927, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 11:17:35,992 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:39,392 INFO L93 Difference]: Finished difference Result 532 states and 555 transitions. [2022-11-20 11:17:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 11:17:39,393 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 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 55 [2022-11-20 11:17:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:39,395 INFO L225 Difference]: With dead ends: 532 [2022-11-20 11:17:39,395 INFO L226 Difference]: Without dead ends: 492 [2022-11-20 11:17:39,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 25 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4632 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1963, Invalid=9379, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 11:17:39,396 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 382 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:39,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 290 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:39,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-20 11:17:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 79. [2022-11-20 11:17:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-20 11:17:39,639 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-20 11:17:39,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:39,640 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-20 11:17:39,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:39,640 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-20 11:17:39,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:17:39,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:39,641 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:39,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-11-20 11:17:39,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:39,841 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:39,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1694745608, now seen corresponding path program 54 times [2022-11-20 11:17:39,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:39,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875129237] [2022-11-20 11:17:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:39,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:40,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:40,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875129237] [2022-11-20 11:17:40,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875129237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:40,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303984957] [2022-11-20 11:17:40,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:17:40,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:40,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:40,225 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:40,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-20 11:17:40,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-11-20 11:17:40,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:40,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:17:40,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:40,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:41,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303984957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:41,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:41,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2022-11-20 11:17:41,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450477498] [2022-11-20 11:17:41,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:41,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:17:41,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:41,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:17:41,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:17:41,269 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:44,731 INFO L93 Difference]: Finished difference Result 573 states and 597 transitions. [2022-11-20 11:17:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-20 11:17:44,731 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 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 55 [2022-11-20 11:17:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:44,734 INFO L225 Difference]: With dead ends: 573 [2022-11-20 11:17:44,734 INFO L226 Difference]: Without dead ends: 533 [2022-11-20 11:17:44,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 66 SyntacticMatches, 25 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1758, Invalid=8342, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 11:17:44,735 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 414 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:44,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 330 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-11-20 11:17:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 79. [2022-11-20 11:17:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-20 11:17:44,987 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-20 11:17:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:44,987 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-20 11:17:44,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-20 11:17:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:17:44,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:44,988 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:44,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-11-20 11:17:45,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:45,189 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1308109913, now seen corresponding path program 55 times [2022-11-20 11:17:45,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:45,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409720112] [2022-11-20 11:17:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:45,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:45,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:45,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409720112] [2022-11-20 11:17:45,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409720112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:45,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308565721] [2022-11-20 11:17:45,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:17:45,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:45,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:45,579 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:45,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-11-20 11:17:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:45,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:17:45,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:46,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:46,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308565721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:46,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:46,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2022-11-20 11:17:46,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508203017] [2022-11-20 11:17:46,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:46,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 11:17:46,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 11:17:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 11:17:46,599 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:50,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:50,078 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2022-11-20 11:17:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-20 11:17:50,078 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 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 55 [2022-11-20 11:17:50,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:50,079 INFO L225 Difference]: With dead ends: 613 [2022-11-20 11:17:50,079 INFO L226 Difference]: Without dead ends: 573 [2022-11-20 11:17:50,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 67 SyntacticMatches, 25 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3382 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1513, Invalid=7043, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 11:17:50,080 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 377 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:50,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 310 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-20 11:17:50,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 79. [2022-11-20 11:17:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-20 11:17:50,346 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2022-11-20 11:17:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:50,346 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-20 11:17:50,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-20 11:17:50,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:17:50,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:50,347 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:50,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-11-20 11:17:50,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-11-20 11:17:50,548 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:50,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:50,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1266428888, now seen corresponding path program 11 times [2022-11-20 11:17:50,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:50,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681440251] [2022-11-20 11:17:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:50,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:50,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:50,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681440251] [2022-11-20 11:17:50,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681440251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:50,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233847069] [2022-11-20 11:17:50,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:17:50,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:50,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:50,970 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:50,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-11-20 11:17:51,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-20 11:17:51,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:51,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:17:51,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:51,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:51,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233847069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:51,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:51,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2022-11-20 11:17:51,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595620812] [2022-11-20 11:17:51,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:51,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 11:17:51,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 11:17:51,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1648, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 11:17:51,997 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:55,492 INFO L93 Difference]: Finished difference Result 655 states and 682 transitions. [2022-11-20 11:17:55,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 11:17:55,492 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 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 55 [2022-11-20 11:17:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:55,493 INFO L225 Difference]: With dead ends: 655 [2022-11-20 11:17:55,493 INFO L226 Difference]: Without dead ends: 615 [2022-11-20 11:17:55,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 68 SyntacticMatches, 25 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1265, Invalid=5541, Unknown=0, NotChecked=0, Total=6806 [2022-11-20 11:17:55,494 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 405 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:55,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 247 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-20 11:17:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 81. [2022-11-20 11:17:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1875) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-11-20 11:17:55,841 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 55 [2022-11-20 11:17:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:55,841 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-11-20 11:17:55,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-11-20 11:17:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 11:17:55,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:55,842 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:55,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-11-20 11:17:56,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:56,042 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:56,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:56,042 INFO L85 PathProgramCache]: Analyzing trace with hash -66956493, now seen corresponding path program 22 times [2022-11-20 11:17:56,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:56,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341394182] [2022-11-20 11:17:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:56,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:56,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:56,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341394182] [2022-11-20 11:17:56,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341394182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:56,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679709709] [2022-11-20 11:17:56,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:17:56,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:56,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:56,247 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:56,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-20 11:17:56,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:17:56,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:56,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:17:56,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:56,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:56,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679709709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:56,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:56,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2022-11-20 11:17:56,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341379643] [2022-11-20 11:17:56,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:56,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:17:56,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:17:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:17:56,641 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:57,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:57,352 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2022-11-20 11:17:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 11:17:57,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-20 11:17:57,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:57,353 INFO L225 Difference]: With dead ends: 92 [2022-11-20 11:17:57,353 INFO L226 Difference]: Without dead ends: 90 [2022-11-20 11:17:57,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 24 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:17:57,353 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 130 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:57,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 174 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:17:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-20 11:17:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-11-20 11:17:57,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.180722891566265) internal successors, (98), 83 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-11-20 11:17:57,612 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 56 [2022-11-20 11:17:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:57,612 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-11-20 11:17:57,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-11-20 11:17:57,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:17:57,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:57,613 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:57,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-11-20 11:17:57,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:57,813 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:57,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1831214499, now seen corresponding path program 23 times [2022-11-20 11:17:57,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:57,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110828473] [2022-11-20 11:17:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:57,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:58,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:58,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110828473] [2022-11-20 11:17:58,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110828473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:58,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506751429] [2022-11-20 11:17:58,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:17:58,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:58,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:58,286 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:58,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-20 11:17:58,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-20 11:17:58,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:17:58,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:59,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:59,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506751429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:59,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:17:59,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2022-11-20 11:17:59,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836978825] [2022-11-20 11:17:59,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:59,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-20 11:17:59,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-20 11:17:59,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=2963, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 11:17:59,708 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:01,210 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2022-11-20 11:18:01,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 11:18:01,210 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 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 59 [2022-11-20 11:18:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:01,211 INFO L225 Difference]: With dead ends: 181 [2022-11-20 11:18:01,211 INFO L226 Difference]: Without dead ends: 138 [2022-11-20 11:18:01,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 61 SyntacticMatches, 27 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4031 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1457, Invalid=6375, Unknown=0, NotChecked=0, Total=7832 [2022-11-20 11:18:01,212 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 92 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:01,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 217 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:18:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-20 11:18:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2022-11-20 11:18:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-20 11:18:01,593 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-20 11:18:01,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:01,593 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-20 11:18:01,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-20 11:18:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:18:01,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:01,594 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:01,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-11-20 11:18:01,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:01,795 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:01,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1372411804, now seen corresponding path program 56 times [2022-11-20 11:18:01,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:01,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463849927] [2022-11-20 11:18:01,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:01,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:02,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:02,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463849927] [2022-11-20 11:18:02,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463849927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:02,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740975095] [2022-11-20 11:18:02,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:18:02,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:02,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:02,271 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:02,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-11-20 11:18:02,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:18:02,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:18:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:03,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:03,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740975095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:03,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:03,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 60 [2022-11-20 11:18:03,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517265930] [2022-11-20 11:18:03,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:03,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-20 11:18:03,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:03,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-20 11:18:03,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=2883, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 11:18:03,669 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:05,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:05,759 INFO L93 Difference]: Finished difference Result 234 states and 251 transitions. [2022-11-20 11:18:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 11:18:05,759 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 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 59 [2022-11-20 11:18:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:05,760 INFO L225 Difference]: With dead ends: 234 [2022-11-20 11:18:05,760 INFO L226 Difference]: Without dead ends: 191 [2022-11-20 11:18:05,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 62 SyntacticMatches, 27 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4697 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1750, Invalid=8150, Unknown=0, NotChecked=0, Total=9900 [2022-11-20 11:18:05,761 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 106 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:05,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 255 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:18:05,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-20 11:18:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 85. [2022-11-20 11:18:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-20 11:18:06,073 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-20 11:18:06,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:06,073 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-20 11:18:06,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:06,073 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-20 11:18:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:18:06,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:06,074 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:06,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:06,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:06,280 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:06,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:06,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1710834051, now seen corresponding path program 57 times [2022-11-20 11:18:06,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:06,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537696317] [2022-11-20 11:18:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:06,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:06,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:06,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537696317] [2022-11-20 11:18:06,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537696317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:06,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696533026] [2022-11-20 11:18:06,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:18:06,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:06,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:06,738 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:06,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-20 11:18:06,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-20 11:18:06,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:06,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:18:06,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:07,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:08,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696533026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:08,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:08,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 59 [2022-11-20 11:18:08,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243506276] [2022-11-20 11:18:08,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:08,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 11:18:08,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 11:18:08,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2801, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 11:18:08,132 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:10,776 INFO L93 Difference]: Finished difference Result 286 states and 304 transitions. [2022-11-20 11:18:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 11:18:10,776 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 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 59 [2022-11-20 11:18:10,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:10,777 INFO L225 Difference]: With dead ends: 286 [2022-11-20 11:18:10,777 INFO L226 Difference]: Without dead ends: 243 [2022-11-20 11:18:10,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 63 SyntacticMatches, 27 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5312 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2046, Invalid=9726, Unknown=0, NotChecked=0, Total=11772 [2022-11-20 11:18:10,778 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 196 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:10,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 238 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:18:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-20 11:18:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 85. [2022-11-20 11:18:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-20 11:18:11,110 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-20 11:18:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:11,111 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-20 11:18:11,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-20 11:18:11,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:18:11,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:11,111 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:11,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-11-20 11:18:11,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:11,312 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1099200380, now seen corresponding path program 58 times [2022-11-20 11:18:11,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:11,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003250956] [2022-11-20 11:18:11,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:11,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:11,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:11,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003250956] [2022-11-20 11:18:11,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003250956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:11,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842510879] [2022-11-20 11:18:11,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:18:11,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:11,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:11,766 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:11,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-20 11:18:11,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:18:11,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:11,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:18:11,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:12,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:13,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842510879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:13,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:13,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 58 [2022-11-20 11:18:13,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993640503] [2022-11-20 11:18:13,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:13,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 11:18:13,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 11:18:13,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=2717, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 11:18:13,147 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:16,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:16,292 INFO L93 Difference]: Finished difference Result 337 states and 356 transitions. [2022-11-20 11:18:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-20 11:18:16,292 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 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 59 [2022-11-20 11:18:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:16,293 INFO L225 Difference]: With dead ends: 337 [2022-11-20 11:18:16,293 INFO L226 Difference]: Without dead ends: 294 [2022-11-20 11:18:16,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 64 SyntacticMatches, 27 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5828 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2304, Invalid=11036, Unknown=0, NotChecked=0, Total=13340 [2022-11-20 11:18:16,294 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 239 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:16,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 236 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:18:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-20 11:18:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 85. [2022-11-20 11:18:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-20 11:18:16,636 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-20 11:18:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:16,636 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-20 11:18:16,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-20 11:18:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:18:16,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:16,637 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:16,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:16,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:16,843 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1996741987, now seen corresponding path program 59 times [2022-11-20 11:18:16,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:16,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600508142] [2022-11-20 11:18:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:16,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:17,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:17,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600508142] [2022-11-20 11:18:17,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600508142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:17,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98355676] [2022-11-20 11:18:17,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:18:17,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:17,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:17,312 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:17,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-11-20 11:18:17,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-20 11:18:17,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:17,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:18:17,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:18,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:18,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98355676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:18,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:18,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2022-11-20 11:18:18,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118650796] [2022-11-20 11:18:18,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:18,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-20 11:18:18,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-20 11:18:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 11:18:18,704 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:22,371 INFO L93 Difference]: Finished difference Result 387 states and 407 transitions. [2022-11-20 11:18:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-20 11:18:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 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 59 [2022-11-20 11:18:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:22,372 INFO L225 Difference]: With dead ends: 387 [2022-11-20 11:18:22,372 INFO L226 Difference]: Without dead ends: 344 [2022-11-20 11:18:22,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 65 SyntacticMatches, 27 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2503, Invalid=12017, Unknown=0, NotChecked=0, Total=14520 [2022-11-20 11:18:22,373 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 390 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:22,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 262 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:18:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-20 11:18:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 85. [2022-11-20 11:18:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-20 11:18:22,744 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-20 11:18:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:22,744 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-20 11:18:22,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-20 11:18:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:18:22,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:22,745 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:22,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:22,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:22,951 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:22,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:22,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1782714204, now seen corresponding path program 60 times [2022-11-20 11:18:22,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:22,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283160663] [2022-11-20 11:18:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:22,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:23,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:23,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283160663] [2022-11-20 11:18:23,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283160663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:23,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108761080] [2022-11-20 11:18:23,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:18:23,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:23,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:23,415 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:23,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-20 11:18:23,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-20 11:18:23,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:23,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:18:23,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:24,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:24,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108761080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:24,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:24,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 56 [2022-11-20 11:18:24,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22871441] [2022-11-20 11:18:24,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:24,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 11:18:24,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:24,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 11:18:24,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 11:18:24,759 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:29,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:29,003 INFO L93 Difference]: Finished difference Result 436 states and 457 transitions. [2022-11-20 11:18:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-20 11:18:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 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 59 [2022-11-20 11:18:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:29,004 INFO L225 Difference]: With dead ends: 436 [2022-11-20 11:18:29,004 INFO L226 Difference]: Without dead ends: 393 [2022-11-20 11:18:29,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 66 SyntacticMatches, 27 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6441 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2628, Invalid=12624, Unknown=0, NotChecked=0, Total=15252 [2022-11-20 11:18:29,005 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 345 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:29,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 329 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:18:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-20 11:18:29,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 85. [2022-11-20 11:18:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-20 11:18:29,450 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-20 11:18:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:29,450 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-20 11:18:29,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-20 11:18:29,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:18:29,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:29,451 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:29,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-11-20 11:18:29,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:29,655 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1211895485, now seen corresponding path program 61 times [2022-11-20 11:18:29,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:29,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522675870] [2022-11-20 11:18:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:29,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 188 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:30,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:30,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522675870] [2022-11-20 11:18:30,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522675870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:30,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86431412] [2022-11-20 11:18:30,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:18:30,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:30,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:30,131 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:30,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-20 11:18:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:30,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:18:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:31,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 222 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:31,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86431412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:31,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:31,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 55 [2022-11-20 11:18:31,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827776071] [2022-11-20 11:18:31,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:31,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 11:18:31,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:31,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 11:18:31,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 11:18:31,512 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:36,135 INFO L93 Difference]: Finished difference Result 484 states and 506 transitions. [2022-11-20 11:18:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-20 11:18:36,135 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 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 59 [2022-11-20 11:18:36,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:36,136 INFO L225 Difference]: With dead ends: 484 [2022-11-20 11:18:36,136 INFO L226 Difference]: Without dead ends: 441 [2022-11-20 11:18:36,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 67 SyntacticMatches, 27 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6486 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2670, Invalid=12830, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 11:18:36,137 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 387 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:36,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 262 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:18:36,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-20 11:18:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 85. [2022-11-20 11:18:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-20 11:18:36,520 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-20 11:18:36,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:36,520 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-20 11:18:36,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:36,520 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-20 11:18:36,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:18:36,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:36,521 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:36,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-11-20 11:18:36,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-11-20 11:18:36,721 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:36,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:36,722 INFO L85 PathProgramCache]: Analyzing trace with hash -884728004, now seen corresponding path program 62 times [2022-11-20 11:18:36,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:36,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340992515] [2022-11-20 11:18:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:36,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:37,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:37,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340992515] [2022-11-20 11:18:37,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340992515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:37,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056224566] [2022-11-20 11:18:37,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:18:37,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:37,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:37,190 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:37,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-11-20 11:18:37,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:18:37,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:37,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:18:37,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:38,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:38,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056224566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:38,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:38,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 54 [2022-11-20 11:18:38,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035869027] [2022-11-20 11:18:38,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:38,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 11:18:38,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:38,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 11:18:38,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 11:18:38,491 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:43,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:43,027 INFO L93 Difference]: Finished difference Result 531 states and 554 transitions. [2022-11-20 11:18:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-20 11:18:43,027 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 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 59 [2022-11-20 11:18:43,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:43,028 INFO L225 Difference]: With dead ends: 531 [2022-11-20 11:18:43,028 INFO L226 Difference]: Without dead ends: 488 [2022-11-20 11:18:43,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 68 SyntacticMatches, 27 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6341 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2626, Invalid=12626, Unknown=0, NotChecked=0, Total=15252 [2022-11-20 11:18:43,029 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 366 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:43,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 313 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:18:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-20 11:18:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 85. [2022-11-20 11:18:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-20 11:18:43,402 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-20 11:18:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:43,403 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-20 11:18:43,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 54 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-20 11:18:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:18:43,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:43,403 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:43,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-11-20 11:18:43,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-11-20 11:18:43,609 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:43,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:43,609 INFO L85 PathProgramCache]: Analyzing trace with hash -121077027, now seen corresponding path program 63 times [2022-11-20 11:18:43,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:43,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566321953] [2022-11-20 11:18:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:43,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:44,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:44,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566321953] [2022-11-20 11:18:44,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566321953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:44,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640729605] [2022-11-20 11:18:44,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:18:44,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:44,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:44,060 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:44,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-20 11:18:44,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-20 11:18:44,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:44,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:18:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:44,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:45,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640729605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:45,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:45,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 53 [2022-11-20 11:18:45,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769805032] [2022-11-20 11:18:45,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:45,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:18:45,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:45,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:18:45,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:18:45,323 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:50,108 INFO L93 Difference]: Finished difference Result 577 states and 601 transitions. [2022-11-20 11:18:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-20 11:18:50,108 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 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 59 [2022-11-20 11:18:50,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:50,109 INFO L225 Difference]: With dead ends: 577 [2022-11-20 11:18:50,109 INFO L226 Difference]: Without dead ends: 534 [2022-11-20 11:18:50,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 69 SyntacticMatches, 27 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6003 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2499, Invalid=12021, Unknown=0, NotChecked=0, Total=14520 [2022-11-20 11:18:50,110 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 398 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:50,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 335 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:18:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-11-20 11:18:50,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 85. [2022-11-20 11:18:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:50,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-20 11:18:50,491 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-20 11:18:50,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:50,491 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-20 11:18:50,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:50,491 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-20 11:18:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:18:50,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:50,492 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:50,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-11-20 11:18:50,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:50,697 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:50,698 INFO L85 PathProgramCache]: Analyzing trace with hash 457746204, now seen corresponding path program 64 times [2022-11-20 11:18:50,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:50,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669620058] [2022-11-20 11:18:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:50,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:51,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:51,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669620058] [2022-11-20 11:18:51,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669620058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:51,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797523038] [2022-11-20 11:18:51,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:18:51,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:51,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:51,167 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:51,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-20 11:18:51,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:18:51,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:51,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:18:51,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:51,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:52,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797523038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:52,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:52,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 52 [2022-11-20 11:18:52,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732360727] [2022-11-20 11:18:52,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:52,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 11:18:52,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:52,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 11:18:52,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 11:18:52,446 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:57,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:57,424 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2022-11-20 11:18:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-20 11:18:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 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 59 [2022-11-20 11:18:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:57,426 INFO L225 Difference]: With dead ends: 622 [2022-11-20 11:18:57,427 INFO L226 Difference]: Without dead ends: 579 [2022-11-20 11:18:57,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 70 SyntacticMatches, 27 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5480 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2298, Invalid=11042, Unknown=0, NotChecked=0, Total=13340 [2022-11-20 11:18:57,428 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 405 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:57,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 320 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:18:57,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-11-20 11:18:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 85. [2022-11-20 11:18:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:57,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-20 11:18:57,802 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-20 11:18:57,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:57,802 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-20 11:18:57,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:57,803 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-20 11:18:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:18:57,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:57,803 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:57,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-11-20 11:18:58,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-11-20 11:18:58,004 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:58,004 INFO L85 PathProgramCache]: Analyzing trace with hash 337870589, now seen corresponding path program 65 times [2022-11-20 11:18:58,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:58,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098220044] [2022-11-20 11:18:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:58,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:58,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:58,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098220044] [2022-11-20 11:18:58,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098220044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:58,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824750405] [2022-11-20 11:18:58,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:18:58,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:58,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:58,473 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:58,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-11-20 11:18:58,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-20 11:18:58,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:58,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:18:58,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:59,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:18:59,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824750405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:59,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:59,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2022-11-20 11:18:59,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648860072] [2022-11-20 11:18:59,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:59,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 11:18:59,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:59,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 11:18:59,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 11:18:59,764 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:04,853 INFO L93 Difference]: Finished difference Result 666 states and 692 transitions. [2022-11-20 11:19:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-20 11:19:04,854 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 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 59 [2022-11-20 11:19:04,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:04,855 INFO L225 Difference]: With dead ends: 666 [2022-11-20 11:19:04,855 INFO L226 Difference]: Without dead ends: 623 [2022-11-20 11:19:04,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 71 SyntacticMatches, 27 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4792 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2038, Invalid=9734, Unknown=0, NotChecked=0, Total=11772 [2022-11-20 11:19:04,857 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 639 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:04,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 297 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:19:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-20 11:19:05,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 85. [2022-11-20 11:19:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-20 11:19:05,264 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-20 11:19:05,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:05,264 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-20 11:19:05,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.176470588235294) internal successors, (111), 51 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-20 11:19:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:19:05,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:05,265 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:05,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-11-20 11:19:05,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-11-20 11:19:05,466 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1467111684, now seen corresponding path program 66 times [2022-11-20 11:19:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:05,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421756802] [2022-11-20 11:19:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:05,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421756802] [2022-11-20 11:19:05,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421756802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301865527] [2022-11-20 11:19:05,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:19:05,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:05,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:05,951 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:05,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-20 11:19:06,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-20 11:19:06,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:06,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:19:06,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:06,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:07,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301865527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:07,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:07,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2022-11-20 11:19:07,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214105565] [2022-11-20 11:19:07,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:07,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 11:19:07,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:07,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 11:19:07,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 11:19:07,243 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:12,472 INFO L93 Difference]: Finished difference Result 709 states and 736 transitions. [2022-11-20 11:19:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-20 11:19:12,472 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 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 59 [2022-11-20 11:19:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:12,474 INFO L225 Difference]: With dead ends: 709 [2022-11-20 11:19:12,474 INFO L226 Difference]: Without dead ends: 666 [2022-11-20 11:19:12,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 72 SyntacticMatches, 27 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1740, Invalid=8160, Unknown=0, NotChecked=0, Total=9900 [2022-11-20 11:19:12,475 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 534 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:12,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 307 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:19:12,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-11-20 11:19:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 85. [2022-11-20 11:19:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 84 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2022-11-20 11:19:13,113 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2022-11-20 11:19:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:13,113 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2022-11-20 11:19:13,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2022-11-20 11:19:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:19:13,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:13,117 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:13,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:13,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-11-20 11:19:13,322 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:13,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:13,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1940978915, now seen corresponding path program 12 times [2022-11-20 11:19:13,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:13,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849996027] [2022-11-20 11:19:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:13,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:13,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:13,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849996027] [2022-11-20 11:19:13,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849996027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:13,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002270386] [2022-11-20 11:19:13,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:19:13,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:13,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:13,891 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:13,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-20 11:19:13,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-20 11:19:13,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:13,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:19:13,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:14,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:15,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002270386] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:15,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:15,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 49 [2022-11-20 11:19:15,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964340420] [2022-11-20 11:19:15,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:15,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:19:15,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:15,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:19:15,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1871, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 11:19:15,103 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:20,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:20,360 INFO L93 Difference]: Finished difference Result 754 states and 783 transitions. [2022-11-20 11:19:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 11:19:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 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 59 [2022-11-20 11:19:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:20,362 INFO L225 Difference]: With dead ends: 754 [2022-11-20 11:19:20,362 INFO L226 Difference]: Without dead ends: 711 [2022-11-20 11:19:20,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 73 SyntacticMatches, 27 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1445, Invalid=6387, Unknown=0, NotChecked=0, Total=7832 [2022-11-20 11:19:20,363 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 626 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:20,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 263 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:19:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-11-20 11:19:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 87. [2022-11-20 11:19:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.186046511627907) internal successors, (102), 86 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2022-11-20 11:19:20,830 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 59 [2022-11-20 11:19:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:20,831 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2022-11-20 11:19:20,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2022-11-20 11:19:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 11:19:20,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:20,831 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:20,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-11-20 11:19:21,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:21,032 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash -794122025, now seen corresponding path program 24 times [2022-11-20 11:19:21,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:21,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491378677] [2022-11-20 11:19:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:21,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:21,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:21,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491378677] [2022-11-20 11:19:21,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491378677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:21,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132019082] [2022-11-20 11:19:21,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:19:21,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:21,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:21,286 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:21,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-11-20 11:19:21,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-20 11:19:21,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:21,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:19:21,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:21,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:21,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132019082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:21,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:21,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-11-20 11:19:21,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359130170] [2022-11-20 11:19:21,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:21,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:19:21,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:21,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:19:21,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:19:21,822 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:22,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:22,693 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-11-20 11:19:22,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 11:19:22,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-20 11:19:22,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:22,694 INFO L225 Difference]: With dead ends: 98 [2022-11-20 11:19:22,694 INFO L226 Difference]: Without dead ends: 96 [2022-11-20 11:19:22,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 104 SyntacticMatches, 26 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:19:22,694 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 146 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:22,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 164 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:19:22,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-20 11:19:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2022-11-20 11:19:23,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-11-20 11:19:23,097 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 60 [2022-11-20 11:19:23,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:23,097 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-11-20 11:19:23,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:23,097 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-11-20 11:19:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:19:23,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:23,098 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:23,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-11-20 11:19:23,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-11-20 11:19:23,298 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:23,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:23,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1004537287, now seen corresponding path program 25 times [2022-11-20 11:19:23,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:23,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984974367] [2022-11-20 11:19:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:23,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:23,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:23,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984974367] [2022-11-20 11:19:23,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984974367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:23,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001070232] [2022-11-20 11:19:23,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:19:23,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:23,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:23,839 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:23,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-20 11:19:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:23,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:19:23,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:24,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:25,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001070232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:25,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:25,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-11-20 11:19:25,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20992862] [2022-11-20 11:19:25,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:25,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-20 11:19:25,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-20 11:19:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3369, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 11:19:25,541 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:27,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:27,589 INFO L93 Difference]: Finished difference Result 194 states and 211 transitions. [2022-11-20 11:19:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 11:19:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 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 63 [2022-11-20 11:19:27,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:27,590 INFO L225 Difference]: With dead ends: 194 [2022-11-20 11:19:27,590 INFO L226 Difference]: Without dead ends: 148 [2022-11-20 11:19:27,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 65 SyntacticMatches, 29 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1650, Invalid=7280, Unknown=0, NotChecked=0, Total=8930 [2022-11-20 11:19:27,591 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:27,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 314 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:19:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-20 11:19:28,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 91. [2022-11-20 11:19:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:28,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:19:28,074 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:19:28,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:28,074 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:19:28,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:28,075 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:19:28,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:19:28,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:28,075 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:28,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-11-20 11:19:28,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-11-20 11:19:28,276 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:28,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:28,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1170782200, now seen corresponding path program 67 times [2022-11-20 11:19:28,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:28,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426845932] [2022-11-20 11:19:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:28,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:28,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:28,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426845932] [2022-11-20 11:19:28,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426845932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:28,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750350189] [2022-11-20 11:19:28,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:19:28,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:28,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:28,846 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:28,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-20 11:19:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:19:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:30,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:30,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750350189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:30,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:30,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2022-11-20 11:19:30,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56796387] [2022-11-20 11:19:30,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:30,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 11:19:30,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:30,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 11:19:30,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=3284, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 11:19:30,610 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:33,436 INFO L93 Difference]: Finished difference Result 251 states and 269 transitions. [2022-11-20 11:19:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 11:19:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 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 63 [2022-11-20 11:19:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:33,437 INFO L225 Difference]: With dead ends: 251 [2022-11-20 11:19:33,437 INFO L226 Difference]: Without dead ends: 205 [2022-11-20 11:19:33,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 66 SyntacticMatches, 29 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5431 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1994, Invalid=9348, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 11:19:33,438 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 133 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:33,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 293 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:19:33,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-20 11:19:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 91. [2022-11-20 11:19:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:19:33,940 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:19:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:33,940 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:19:33,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:19:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:19:33,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:33,940 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:33,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-11-20 11:19:34,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-11-20 11:19:34,141 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:34,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1933690457, now seen corresponding path program 68 times [2022-11-20 11:19:34,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:34,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241477988] [2022-11-20 11:19:34,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:34,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:34,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:34,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241477988] [2022-11-20 11:19:34,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241477988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:34,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764685195] [2022-11-20 11:19:34,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:19:34,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:34,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:34,716 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:34,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-11-20 11:19:34,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:19:34,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:34,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:19:34,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:35,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:36,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764685195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:36,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:36,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 63 [2022-11-20 11:19:36,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807083003] [2022-11-20 11:19:36,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:36,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-20 11:19:36,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:36,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-20 11:19:36,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=3197, Unknown=0, NotChecked=0, Total=3906 [2022-11-20 11:19:36,482 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:40,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:40,143 INFO L93 Difference]: Finished difference Result 307 states and 326 transitions. [2022-11-20 11:19:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-20 11:19:40,143 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 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 63 [2022-11-20 11:19:40,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:40,144 INFO L225 Difference]: With dead ends: 307 [2022-11-20 11:19:40,144 INFO L226 Difference]: Without dead ends: 261 [2022-11-20 11:19:40,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 67 SyntacticMatches, 29 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6177 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2348, Invalid=11224, Unknown=0, NotChecked=0, Total=13572 [2022-11-20 11:19:40,145 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 247 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:40,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 236 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:19:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-20 11:19:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 91. [2022-11-20 11:19:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:19:40,663 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:19:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:40,664 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:19:40,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:19:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:19:40,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:40,675 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:40,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:40,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:40,881 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:40,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1127016408, now seen corresponding path program 69 times [2022-11-20 11:19:40,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:40,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68664707] [2022-11-20 11:19:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:40,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:41,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:41,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68664707] [2022-11-20 11:19:41,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68664707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:41,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218831224] [2022-11-20 11:19:41,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:19:41,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:41,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:41,482 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:41,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-11-20 11:19:41,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-20 11:19:41,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:41,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:19:41,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:42,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:43,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218831224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:43,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:43,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2022-11-20 11:19:43,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795057809] [2022-11-20 11:19:43,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:43,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-20 11:19:43,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-20 11:19:43,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=3108, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 11:19:43,200 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:47,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:47,611 INFO L93 Difference]: Finished difference Result 362 states and 382 transitions. [2022-11-20 11:19:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 11:19:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 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 63 [2022-11-20 11:19:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:47,612 INFO L225 Difference]: With dead ends: 362 [2022-11-20 11:19:47,612 INFO L226 Difference]: Without dead ends: 316 [2022-11-20 11:19:47,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 68 SyntacticMatches, 29 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6828 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2667, Invalid=12833, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 11:19:47,614 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 254 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:47,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 320 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:19:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-20 11:19:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 91. [2022-11-20 11:19:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:19:48,128 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:19:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:48,128 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:19:48,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:48,128 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:19:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:19:48,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:48,128 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:48,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:48,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-11-20 11:19:48,329 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:48,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1655183993, now seen corresponding path program 70 times [2022-11-20 11:19:48,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:48,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723614494] [2022-11-20 11:19:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:48,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:48,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:48,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723614494] [2022-11-20 11:19:48,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723614494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:48,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294194217] [2022-11-20 11:19:48,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:19:48,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:48,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:48,880 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:48,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-20 11:19:48,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:19:48,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:48,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:19:48,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:49,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:50,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294194217] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:50,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:50,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2022-11-20 11:19:50,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106909570] [2022-11-20 11:19:50,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:50,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-20 11:19:50,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:50,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-20 11:19:50,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=3017, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 11:19:50,511 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:55,648 INFO L93 Difference]: Finished difference Result 416 states and 437 transitions. [2022-11-20 11:19:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-20 11:19:55,649 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 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 63 [2022-11-20 11:19:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:55,649 INFO L225 Difference]: With dead ends: 416 [2022-11-20 11:19:55,649 INFO L226 Difference]: Without dead ends: 370 [2022-11-20 11:19:55,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 69 SyntacticMatches, 29 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7349 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2927, Invalid=14103, Unknown=0, NotChecked=0, Total=17030 [2022-11-20 11:19:55,651 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 252 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:55,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 425 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:19:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-20 11:19:56,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 91. [2022-11-20 11:19:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:19:56,191 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:19:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:56,191 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:19:56,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:19:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:19:56,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:56,192 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:56,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-11-20 11:19:56,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:56,392 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:56,393 INFO L85 PathProgramCache]: Analyzing trace with hash 563843000, now seen corresponding path program 71 times [2022-11-20 11:19:56,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:56,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599321620] [2022-11-20 11:19:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:56,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:57,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:57,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599321620] [2022-11-20 11:19:57,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599321620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:57,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460651521] [2022-11-20 11:19:57,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:19:57,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:57,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:57,028 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:57,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-11-20 11:19:57,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-20 11:19:57,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:57,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:19:57,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:58,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:58,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460651521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:58,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:58,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 60 [2022-11-20 11:19:58,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305695145] [2022-11-20 11:19:58,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:58,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-20 11:19:58,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:58,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-20 11:19:58,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=2924, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 11:19:58,688 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:04,291 INFO L93 Difference]: Finished difference Result 469 states and 491 transitions. [2022-11-20 11:20:04,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-20 11:20:04,291 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 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 63 [2022-11-20 11:20:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:04,291 INFO L225 Difference]: With dead ends: 469 [2022-11-20 11:20:04,292 INFO L226 Difference]: Without dead ends: 423 [2022-11-20 11:20:04,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 70 SyntacticMatches, 29 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7702 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3110, Invalid=14980, Unknown=0, NotChecked=0, Total=18090 [2022-11-20 11:20:04,293 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 329 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:04,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 316 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:20:04,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-20 11:20:04,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 91. [2022-11-20 11:20:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:20:04,860 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:20:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:04,860 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:20:04,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:20:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:20:04,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:04,861 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:04,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:05,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:05,066 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:05,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1775564441, now seen corresponding path program 72 times [2022-11-20 11:20:05,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:05,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612530077] [2022-11-20 11:20:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:05,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:05,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:05,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612530077] [2022-11-20 11:20:05,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612530077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:05,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949670306] [2022-11-20 11:20:05,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:20:05,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:05,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:05,625 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:05,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-20 11:20:05,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-11-20 11:20:05,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:20:05,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:20:05,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:06,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:07,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949670306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:07,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:07,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 59 [2022-11-20 11:20:07,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794033915] [2022-11-20 11:20:07,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:07,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 11:20:07,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:07,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 11:20:07,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=2829, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 11:20:07,260 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:13,505 INFO L93 Difference]: Finished difference Result 521 states and 544 transitions. [2022-11-20 11:20:13,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 11:20:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-20 11:20:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:13,507 INFO L225 Difference]: With dead ends: 521 [2022-11-20 11:20:13,507 INFO L226 Difference]: Without dead ends: 475 [2022-11-20 11:20:13,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 71 SyntacticMatches, 29 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7861 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3204, Invalid=15428, Unknown=0, NotChecked=0, Total=18632 [2022-11-20 11:20:13,509 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 421 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:13,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 277 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:20:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-20 11:20:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 91. [2022-11-20 11:20:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:20:14,090 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:20:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:14,090 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:20:14,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:20:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:20:14,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:14,091 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:14,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:14,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-11-20 11:20:14,292 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:14,292 INFO L85 PathProgramCache]: Analyzing trace with hash 290631576, now seen corresponding path program 73 times [2022-11-20 11:20:14,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:14,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516149063] [2022-11-20 11:20:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:14,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 223 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:14,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516149063] [2022-11-20 11:20:14,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516149063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920523064] [2022-11-20 11:20:14,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:20:14,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:14,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:14,854 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:14,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-11-20 11:20:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:14,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:20:14,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:15,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 260 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:16,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920523064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:16,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:16,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 58 [2022-11-20 11:20:16,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455648764] [2022-11-20 11:20:16,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:16,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 11:20:16,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:16,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 11:20:16,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2732, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 11:20:16,473 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:22,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:22,951 INFO L93 Difference]: Finished difference Result 572 states and 596 transitions. [2022-11-20 11:20:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-20 11:20:22,951 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 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 63 [2022-11-20 11:20:22,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:22,952 INFO L225 Difference]: With dead ends: 572 [2022-11-20 11:20:22,952 INFO L226 Difference]: Without dead ends: 526 [2022-11-20 11:20:22,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 72 SyntacticMatches, 29 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3203, Invalid=15429, Unknown=0, NotChecked=0, Total=18632 [2022-11-20 11:20:22,954 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 449 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:22,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 397 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:20:22,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-11-20 11:20:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 91. [2022-11-20 11:20:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:20:23,505 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:20:23,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:23,505 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:20:23,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:20:23,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:20:23,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:23,506 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:23,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:23,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:23,712 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:23,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:23,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1489656505, now seen corresponding path program 74 times [2022-11-20 11:20:23,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:23,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243939316] [2022-11-20 11:20:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:23,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 223 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:24,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:24,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243939316] [2022-11-20 11:20:24,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243939316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:24,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276828649] [2022-11-20 11:20:24,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:20:24,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:24,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:24,249 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:24,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-11-20 11:20:24,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:20:24,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:20:24,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:20:24,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:25,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 260 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:25,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276828649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:25,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:25,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 57 [2022-11-20 11:20:25,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177086266] [2022-11-20 11:20:25,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:25,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-20 11:20:25,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-20 11:20:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 11:20:25,760 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:32,453 INFO L93 Difference]: Finished difference Result 622 states and 647 transitions. [2022-11-20 11:20:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-20 11:20:32,453 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 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 63 [2022-11-20 11:20:32,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:32,454 INFO L225 Difference]: With dead ends: 622 [2022-11-20 11:20:32,454 INFO L226 Difference]: Without dead ends: 576 [2022-11-20 11:20:32,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 73 SyntacticMatches, 29 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7549 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3107, Invalid=14983, Unknown=0, NotChecked=0, Total=18090 [2022-11-20 11:20:32,455 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 472 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:32,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 293 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:20:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-11-20 11:20:33,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 91. [2022-11-20 11:20:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:20:33,008 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:20:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:33,008 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:20:33,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 57 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:20:33,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:20:33,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:33,009 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:33,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-11-20 11:20:33,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-11-20 11:20:33,211 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:33,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:33,211 INFO L85 PathProgramCache]: Analyzing trace with hash 974145400, now seen corresponding path program 75 times [2022-11-20 11:20:33,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:33,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438251505] [2022-11-20 11:20:33,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:33,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 223 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:33,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:33,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438251505] [2022-11-20 11:20:33,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438251505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:33,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521207556] [2022-11-20 11:20:33,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:20:33,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:33,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:33,800 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:33,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-11-20 11:20:33,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-20 11:20:33,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:20:33,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:20:33,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:34,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 260 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:35,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521207556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:35,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:35,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 56 [2022-11-20 11:20:35,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373236460] [2022-11-20 11:20:35,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:35,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 11:20:35,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:35,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 11:20:35,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 11:20:35,258 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:42,998 INFO L93 Difference]: Finished difference Result 671 states and 697 transitions. [2022-11-20 11:20:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 11:20:42,998 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 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 63 [2022-11-20 11:20:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:42,999 INFO L225 Difference]: With dead ends: 671 [2022-11-20 11:20:42,999 INFO L226 Difference]: Without dead ends: 625 [2022-11-20 11:20:43,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 74 SyntacticMatches, 29 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7074 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2922, Invalid=14108, Unknown=0, NotChecked=0, Total=17030 [2022-11-20 11:20:43,000 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 454 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:43,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 326 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:20:43,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-11-20 11:20:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 91. [2022-11-20 11:20:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:20:43,610 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:20:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:43,610 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:20:43,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 56 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:20:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:20:43,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:43,611 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:43,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:43,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-11-20 11:20:43,811 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:43,812 INFO L85 PathProgramCache]: Analyzing trace with hash 403326681, now seen corresponding path program 76 times [2022-11-20 11:20:43,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:43,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155536111] [2022-11-20 11:20:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:43,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:44,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:44,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155536111] [2022-11-20 11:20:44,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155536111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:44,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139022547] [2022-11-20 11:20:44,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:20:44,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:44,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:44,358 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:44,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-11-20 11:20:44,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:20:44,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:20:44,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:20:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:45,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 260 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:45,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139022547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:45,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:45,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 55 [2022-11-20 11:20:45,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020694644] [2022-11-20 11:20:45,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:45,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 11:20:45,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:45,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 11:20:45,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 11:20:45,961 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:52,892 INFO L93 Difference]: Finished difference Result 719 states and 746 transitions. [2022-11-20 11:20:52,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-20 11:20:52,893 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 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 63 [2022-11-20 11:20:52,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:52,893 INFO L225 Difference]: With dead ends: 719 [2022-11-20 11:20:52,894 INFO L226 Difference]: Without dead ends: 673 [2022-11-20 11:20:52,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 75 SyntacticMatches, 29 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6401 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2660, Invalid=12840, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 11:20:52,894 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 494 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:52,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 326 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:20:52,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-11-20 11:20:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 91. [2022-11-20 11:20:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:20:53,430 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:20:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:53,430 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:20:53,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:20:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:20:53,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:53,431 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:53,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-11-20 11:20:53,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-11-20 11:20:53,632 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1693296808, now seen corresponding path program 77 times [2022-11-20 11:20:53,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538710585] [2022-11-20 11:20:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:53,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 223 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:54,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:54,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538710585] [2022-11-20 11:20:54,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538710585] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:54,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364708161] [2022-11-20 11:20:54,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:20:54,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:54,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:54,122 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:54,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-11-20 11:20:54,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-20 11:20:54,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:20:54,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:20:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:55,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 260 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:55,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364708161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:55,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:20:55,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 54 [2022-11-20 11:20:55,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404728211] [2022-11-20 11:20:55,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:55,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 11:20:55,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 11:20:55,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2324, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 11:20:55,491 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:02,296 INFO L93 Difference]: Finished difference Result 766 states and 794 transitions. [2022-11-20 11:21:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-20 11:21:02,296 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 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 63 [2022-11-20 11:21:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:02,297 INFO L225 Difference]: With dead ends: 766 [2022-11-20 11:21:02,297 INFO L226 Difference]: Without dead ends: 720 [2022-11-20 11:21:02,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 76 SyntacticMatches, 29 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2339, Invalid=11233, Unknown=0, NotChecked=0, Total=13572 [2022-11-20 11:21:02,298 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 544 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:02,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 318 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:21:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-11-20 11:21:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 91. [2022-11-20 11:21:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:21:02,847 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:21:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:02,847 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:21:02,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:21:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:21:02,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:02,848 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:02,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-11-20 11:21:03,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:03,048 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash -929645831, now seen corresponding path program 78 times [2022-11-20 11:21:03,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:03,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112617386] [2022-11-20 11:21:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:03,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:03,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:03,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112617386] [2022-11-20 11:21:03,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112617386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:03,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693425809] [2022-11-20 11:21:03,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:21:03,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:03,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:03,554 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:03,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-20 11:21:03,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-11-20 11:21:03,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:21:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:21:03,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:04,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 260 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:04,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693425809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:04,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:21:04,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2022-11-20 11:21:04,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605045806] [2022-11-20 11:21:04,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:04,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:21:04,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:04,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:21:04,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:21:04,845 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:11,726 INFO L93 Difference]: Finished difference Result 812 states and 841 transitions. [2022-11-20 11:21:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 11:21:11,726 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 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 63 [2022-11-20 11:21:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:11,727 INFO L225 Difference]: With dead ends: 812 [2022-11-20 11:21:11,727 INFO L226 Difference]: Without dead ends: 766 [2022-11-20 11:21:11,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 77 SyntacticMatches, 29 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4547 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1983, Invalid=9359, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 11:21:11,728 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 437 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:11,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 399 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:21:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-11-20 11:21:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 91. [2022-11-20 11:21:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-11-20 11:21:12,268 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 63 [2022-11-20 11:21:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:12,268 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-11-20 11:21:12,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:12,269 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-11-20 11:21:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:21:12,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:12,269 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:12,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-11-20 11:21:12,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:12,470 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash -350822600, now seen corresponding path program 13 times [2022-11-20 11:21:12,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:12,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231394497] [2022-11-20 11:21:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:12,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:12,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:12,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231394497] [2022-11-20 11:21:12,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231394497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:12,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357868286] [2022-11-20 11:21:12,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:21:12,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:12,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:12,978 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:12,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-11-20 11:21:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:13,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:21:13,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:13,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:14,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357868286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:14,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:21:14,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2022-11-20 11:21:14,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266840257] [2022-11-20 11:21:14,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:14,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 11:21:14,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:14,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 11:21:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=2108, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 11:21:14,264 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:21,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:21,312 INFO L93 Difference]: Finished difference Result 860 states and 891 transitions. [2022-11-20 11:21:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-20 11:21:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 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 63 [2022-11-20 11:21:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:21,313 INFO L225 Difference]: With dead ends: 860 [2022-11-20 11:21:21,313 INFO L226 Difference]: Without dead ends: 814 [2022-11-20 11:21:21,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 78 SyntacticMatches, 29 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3489 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1637, Invalid=7293, Unknown=0, NotChecked=0, Total=8930 [2022-11-20 11:21:21,314 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 479 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:21,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 356 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:21:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-11-20 11:21:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 93. [2022-11-20 11:21:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2022-11-20 11:21:21,871 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 63 [2022-11-20 11:21:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:21,871 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2022-11-20 11:21:21,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.230769230769231) internal successors, (116), 52 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2022-11-20 11:21:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 11:21:21,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:21,872 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:21,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-11-20 11:21:22,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-11-20 11:21:22,072 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:22,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:22,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2032864333, now seen corresponding path program 26 times [2022-11-20 11:21:22,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:22,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364912742] [2022-11-20 11:21:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:22,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:22,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:22,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364912742] [2022-11-20 11:21:22,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364912742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:22,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806795370] [2022-11-20 11:21:22,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:21:22,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:22,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:22,334 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:22,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-11-20 11:21:22,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:21:22,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:21:22,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:21:22,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:22,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:22,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806795370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:22,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:21:22,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2022-11-20 11:21:22,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442494591] [2022-11-20 11:21:22,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:22,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:21:22,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:22,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:21:22,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:21:22,799 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:23,903 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2022-11-20 11:21:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 11:21:23,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-20 11:21:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:23,904 INFO L225 Difference]: With dead ends: 104 [2022-11-20 11:21:23,904 INFO L226 Difference]: Without dead ends: 102 [2022-11-20 11:21:23,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 111 SyntacticMatches, 28 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:21:23,905 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 122 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:23,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 236 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:21:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-20 11:21:24,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2022-11-20 11:21:24,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 95 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2022-11-20 11:21:24,491 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 64 [2022-11-20 11:21:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:24,491 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2022-11-20 11:21:24,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:24,491 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2022-11-20 11:21:24,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:21:24,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:24,492 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:24,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-11-20 11:21:24,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-11-20 11:21:24,697 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:24,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2017627683, now seen corresponding path program 27 times [2022-11-20 11:21:24,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:24,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207293873] [2022-11-20 11:21:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:24,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:25,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:25,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207293873] [2022-11-20 11:21:25,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207293873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:25,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449854602] [2022-11-20 11:21:25,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:21:25,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:25,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:25,294 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:25,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-20 11:21:25,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-20 11:21:25,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:21:25,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:21:25,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:26,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:27,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449854602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:27,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:21:27,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2022-11-20 11:21:27,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203025434] [2022-11-20 11:21:27,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:27,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-20 11:21:27,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:27,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-20 11:21:27,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3801, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 11:21:27,086 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:29,379 INFO L93 Difference]: Finished difference Result 207 states and 225 transitions. [2022-11-20 11:21:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 11:21:29,379 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:21:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:29,380 INFO L225 Difference]: With dead ends: 207 [2022-11-20 11:21:29,380 INFO L226 Difference]: Without dead ends: 158 [2022-11-20 11:21:29,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 69 SyntacticMatches, 31 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5298 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 11:21:29,380 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:29,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 235 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:21:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-20 11:21:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2022-11-20 11:21:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:21:29,987 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:21:29,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:29,987 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:21:29,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:21:29,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:21:29,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:29,988 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:29,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-11-20 11:21:30,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:30,188 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:30,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1732458524, now seen corresponding path program 79 times [2022-11-20 11:21:30,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:30,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471557443] [2022-11-20 11:21:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:30,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 261 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:30,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:30,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471557443] [2022-11-20 11:21:30,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471557443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:30,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514123787] [2022-11-20 11:21:30,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:21:30,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:30,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:30,772 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:30,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-11-20 11:21:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:30,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:21:30,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:32,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:32,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514123787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:32,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:21:32,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 68 [2022-11-20 11:21:32,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208577319] [2022-11-20 11:21:32,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:32,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 11:21:32,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:32,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 11:21:32,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=3711, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 11:21:32,616 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:35,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:35,937 INFO L93 Difference]: Finished difference Result 268 states and 287 transitions. [2022-11-20 11:21:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 11:21:35,937 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:21:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:35,938 INFO L225 Difference]: With dead ends: 268 [2022-11-20 11:21:35,938 INFO L226 Difference]: Without dead ends: 219 [2022-11-20 11:21:35,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 70 SyntacticMatches, 31 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6218 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2254, Invalid=10628, Unknown=0, NotChecked=0, Total=12882 [2022-11-20 11:21:35,939 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 145 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:35,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 247 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:21:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-20 11:21:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 97. [2022-11-20 11:21:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:21:36,586 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:21:36,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:36,586 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:21:36,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:21:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:21:36,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:36,587 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:36,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-11-20 11:21:36,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:36,793 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:36,793 INFO L85 PathProgramCache]: Analyzing trace with hash -86233603, now seen corresponding path program 80 times [2022-11-20 11:21:36,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:36,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486146385] [2022-11-20 11:21:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:36,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 261 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:37,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:37,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486146385] [2022-11-20 11:21:37,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486146385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:37,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791042815] [2022-11-20 11:21:37,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:21:37,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:37,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:37,381 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:37,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-11-20 11:21:37,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:21:37,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:21:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:21:37,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:38,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:39,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791042815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:39,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:21:39,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 67 [2022-11-20 11:21:39,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503963703] [2022-11-20 11:21:39,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:39,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-20 11:21:39,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:39,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-20 11:21:39,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=3619, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 11:21:39,153 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:43,407 INFO L93 Difference]: Finished difference Result 328 states and 348 transitions. [2022-11-20 11:21:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 11:21:43,407 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:21:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:43,408 INFO L225 Difference]: With dead ends: 328 [2022-11-20 11:21:43,408 INFO L226 Difference]: Without dead ends: 279 [2022-11-20 11:21:43,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 71 SyntacticMatches, 31 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7107 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2671, Invalid=12829, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 11:21:43,409 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 194 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:43,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 293 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:21:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-20 11:21:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 97. [2022-11-20 11:21:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:21:44,054 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:21:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:44,055 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:21:44,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:21:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:21:44,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:44,056 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:44,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-11-20 11:21:44,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:44,261 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:44,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1253279748, now seen corresponding path program 81 times [2022-11-20 11:21:44,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:44,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848263985] [2022-11-20 11:21:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:44,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 261 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:44,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:44,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848263985] [2022-11-20 11:21:44,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848263985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:44,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994534944] [2022-11-20 11:21:44,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:21:44,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:44,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:44,848 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:44,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-11-20 11:21:44,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-20 11:21:44,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:21:44,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:21:44,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:46,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:46,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994534944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:46,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:21:46,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 66 [2022-11-20 11:21:46,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235659458] [2022-11-20 11:21:46,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:46,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:21:46,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:46,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:21:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3525, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:21:46,566 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:21:51,763 INFO L93 Difference]: Finished difference Result 387 states and 408 transitions. [2022-11-20 11:21:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-20 11:21:51,763 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:21:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:21:51,764 INFO L225 Difference]: With dead ends: 387 [2022-11-20 11:21:51,764 INFO L226 Difference]: Without dead ends: 338 [2022-11-20 11:21:51,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 72 SyntacticMatches, 31 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7907 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3057, Invalid=14765, Unknown=0, NotChecked=0, Total=17822 [2022-11-20 11:21:51,765 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 263 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:21:51,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 293 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:21:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-20 11:21:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 97. [2022-11-20 11:21:52,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:21:52,432 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:21:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:21:52,432 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:21:52,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0303030303030303) internal successors, (134), 66 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:52,432 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:21:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:21:52,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:21:52,433 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:21:52,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-11-20 11:21:52,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-11-20 11:21:52,633 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:21:52,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:21:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1757114909, now seen corresponding path program 82 times [2022-11-20 11:21:52,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:21:52,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322074716] [2022-11-20 11:21:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:21:52,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:21:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:21:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:53,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:21:53,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322074716] [2022-11-20 11:21:53,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322074716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:53,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743930111] [2022-11-20 11:21:53,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:21:53,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:21:53,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:21:53,194 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:21:53,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-11-20 11:21:53,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:21:53,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:21:53,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:21:53,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:21:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:54,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:21:54,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743930111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:21:54,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:21:54,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 65 [2022-11-20 11:21:54,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582397112] [2022-11-20 11:21:54,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:54,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-20 11:21:54,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:54,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-20 11:21:54,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 11:21:54,829 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:01,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:01,054 INFO L93 Difference]: Finished difference Result 445 states and 467 transitions. [2022-11-20 11:22:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-20 11:22:01,054 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:22:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:01,055 INFO L225 Difference]: With dead ends: 445 [2022-11-20 11:22:01,055 INFO L226 Difference]: Without dead ends: 396 [2022-11-20 11:22:01,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 73 SyntacticMatches, 31 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8578 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3385, Invalid=16355, Unknown=0, NotChecked=0, Total=19740 [2022-11-20 11:22:01,056 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 332 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:01,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 335 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:22:01,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-11-20 11:22:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 97. [2022-11-20 11:22:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:01,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:22:01,757 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:22:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:01,757 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:22:01,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:01,757 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:22:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:22:01,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:01,757 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:01,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-11-20 11:22:01,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-11-20 11:22:01,958 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:01,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash -362532900, now seen corresponding path program 83 times [2022-11-20 11:22:01,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:01,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499621587] [2022-11-20 11:22:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:01,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 261 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:02,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:02,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499621587] [2022-11-20 11:22:02,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499621587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:22:02,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060986053] [2022-11-20 11:22:02,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:22:02,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:02,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:02,525 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:02,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-11-20 11:22:02,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-11-20 11:22:02,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:22:02,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:22:02,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:03,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:04,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060986053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:04,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:22:04,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 64 [2022-11-20 11:22:04,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685760716] [2022-11-20 11:22:04,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:04,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 11:22:04,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 11:22:04,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=3331, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 11:22:04,142 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:11,154 INFO L93 Difference]: Finished difference Result 502 states and 525 transitions. [2022-11-20 11:22:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-20 11:22:11,155 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:22:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:11,156 INFO L225 Difference]: With dead ends: 502 [2022-11-20 11:22:11,156 INFO L226 Difference]: Without dead ends: 453 [2022-11-20 11:22:11,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 74 SyntacticMatches, 31 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9076 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3634, Invalid=17536, Unknown=0, NotChecked=0, Total=21170 [2022-11-20 11:22:11,158 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 361 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:11,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 356 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:22:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-11-20 11:22:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 97. [2022-11-20 11:22:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:22:12,101 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:22:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:12,101 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:22:12,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0625) internal successors, (132), 64 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:22:12,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:22:12,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:12,102 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:12,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:12,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:12,302 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash 400375357, now seen corresponding path program 84 times [2022-11-20 11:22:12,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:12,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486288895] [2022-11-20 11:22:12,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:12,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:12,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:12,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486288895] [2022-11-20 11:22:12,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486288895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:22:12,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99350170] [2022-11-20 11:22:12,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:22:12,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:12,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:12,891 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:12,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-11-20 11:22:12,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-20 11:22:12,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:22:12,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:22:12,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:14,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:14,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99350170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:14,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:22:14,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 63 [2022-11-20 11:22:14,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415611850] [2022-11-20 11:22:14,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:14,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-20 11:22:14,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:14,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-20 11:22:14,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3231, Unknown=0, NotChecked=0, Total=3906 [2022-11-20 11:22:14,588 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:22,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:22,026 INFO L93 Difference]: Finished difference Result 558 states and 582 transitions. [2022-11-20 11:22:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-20 11:22:22,026 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:22:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:22,027 INFO L225 Difference]: With dead ends: 558 [2022-11-20 11:22:22,027 INFO L226 Difference]: Without dead ends: 509 [2022-11-20 11:22:22,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 75 SyntacticMatches, 31 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9369 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3789, Invalid=18263, Unknown=0, NotChecked=0, Total=22052 [2022-11-20 11:22:22,029 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 456 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:22,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 391 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:22:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-11-20 11:22:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 97. [2022-11-20 11:22:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:22:22,726 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:22:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:22,726 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:22:22,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:22:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:22:22,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:22,727 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:22,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-11-20 11:22:22,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-11-20 11:22:22,933 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:22,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:22,933 INFO L85 PathProgramCache]: Analyzing trace with hash -406298692, now seen corresponding path program 85 times [2022-11-20 11:22:22,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:22,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707329590] [2022-11-20 11:22:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:22,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 261 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:23,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:23,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707329590] [2022-11-20 11:22:23,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707329590] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:22:23,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911680394] [2022-11-20 11:22:23,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:22:23,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:23,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:23,480 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:23,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-11-20 11:22:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:23,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:22:23,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:24,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 301 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:25,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911680394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:25,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:22:25,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 62 [2022-11-20 11:22:25,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464894507] [2022-11-20 11:22:25,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:25,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-20 11:22:25,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:25,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-20 11:22:25,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 11:22:25,058 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:33,049 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2022-11-20 11:22:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-20 11:22:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:22:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:33,050 INFO L225 Difference]: With dead ends: 613 [2022-11-20 11:22:33,050 INFO L226 Difference]: Without dead ends: 564 [2022-11-20 11:22:33,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 76 SyntacticMatches, 31 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9437 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3841, Invalid=18509, Unknown=0, NotChecked=0, Total=22350 [2022-11-20 11:22:33,051 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 437 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:33,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 364 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:22:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-20 11:22:33,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 97. [2022-11-20 11:22:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:22:33,776 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:22:33,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:33,776 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:22:33,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:22:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:22:33,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:33,777 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:33,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-11-20 11:22:33,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-11-20 11:22:33,982 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:33,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:33,983 INFO L85 PathProgramCache]: Analyzing trace with hash 121868893, now seen corresponding path program 86 times [2022-11-20 11:22:33,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:33,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132778101] [2022-11-20 11:22:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:33,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 261 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:34,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:34,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132778101] [2022-11-20 11:22:34,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132778101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:22:34,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136192128] [2022-11-20 11:22:34,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:22:34,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:34,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:34,560 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:34,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-11-20 11:22:34,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:22:34,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:22:34,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:22:34,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:35,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 301 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:36,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136192128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:36,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:22:36,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 61 [2022-11-20 11:22:36,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635613356] [2022-11-20 11:22:36,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:36,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-20 11:22:36,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:36,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-20 11:22:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=3025, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 11:22:36,192 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:44,960 INFO L93 Difference]: Finished difference Result 667 states and 693 transitions. [2022-11-20 11:22:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-20 11:22:44,960 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:22:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:44,961 INFO L225 Difference]: With dead ends: 667 [2022-11-20 11:22:44,962 INFO L226 Difference]: Without dead ends: 618 [2022-11-20 11:22:44,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 77 SyntacticMatches, 31 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9271 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3787, Invalid=18265, Unknown=0, NotChecked=0, Total=22052 [2022-11-20 11:22:44,963 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 439 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:44,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 418 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:22:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-11-20 11:22:45,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 97. [2022-11-20 11:22:45,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:22:45,773 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:22:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:45,773 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:22:45,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:22:45,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:22:45,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:45,774 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:45,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-11-20 11:22:45,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-11-20 11:22:45,977 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:45,977 INFO L85 PathProgramCache]: Analyzing trace with hash -969472100, now seen corresponding path program 87 times [2022-11-20 11:22:45,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:45,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057544261] [2022-11-20 11:22:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:45,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 261 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:46,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:46,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057544261] [2022-11-20 11:22:46,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057544261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:22:46,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755478817] [2022-11-20 11:22:46,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:22:46,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:46,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:46,608 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:46,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-11-20 11:22:46,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-20 11:22:46,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:22:46,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:22:46,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:22:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:47,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:22:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 301 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:48,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755478817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:22:48,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:22:48,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 60 [2022-11-20 11:22:48,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603374552] [2022-11-20 11:22:48,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:22:48,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-20 11:22:48,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:22:48,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-20 11:22:48,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 11:22:48,302 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:22:57,662 INFO L93 Difference]: Finished difference Result 720 states and 747 transitions. [2022-11-20 11:22:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-20 11:22:57,662 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:22:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:22:57,663 INFO L225 Difference]: With dead ends: 720 [2022-11-20 11:22:57,663 INFO L226 Difference]: Without dead ends: 671 [2022-11-20 11:22:57,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 78 SyntacticMatches, 31 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8868 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3630, Invalid=17540, Unknown=0, NotChecked=0, Total=21170 [2022-11-20 11:22:57,665 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 648 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:22:57,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 319 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:22:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-11-20 11:22:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 97. [2022-11-20 11:22:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:22:58,433 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:22:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:22:58,433 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:22:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:22:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:22:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:22:58,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:22:58,434 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:22:58,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-11-20 11:22:58,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-11-20 11:22:58,639 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:22:58,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:22:58,639 INFO L85 PathProgramCache]: Analyzing trace with hash 242249341, now seen corresponding path program 88 times [2022-11-20 11:22:58,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:22:58,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3708619] [2022-11-20 11:22:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:22:58,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:22:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:22:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 261 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:22:59,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:22:59,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3708619] [2022-11-20 11:22:59,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3708619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:22:59,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391978370] [2022-11-20 11:22:59,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:22:59,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:22:59,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:22:59,201 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:22:59,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-11-20 11:22:59,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:22:59,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:22:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:22:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:23:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:00,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:23:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 301 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:00,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391978370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:23:00,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:23:00,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 59 [2022-11-20 11:23:00,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385372847] [2022-11-20 11:23:00,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:23:00,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 11:23:00,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:23:00,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 11:23:00,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2811, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 11:23:00,765 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:23:10,534 INFO L93 Difference]: Finished difference Result 772 states and 800 transitions. [2022-11-20 11:23:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-20 11:23:10,535 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:23:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:23:10,535 INFO L225 Difference]: With dead ends: 772 [2022-11-20 11:23:10,535 INFO L226 Difference]: Without dead ends: 723 [2022-11-20 11:23:10,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 79 SyntacticMatches, 31 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8236 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3379, Invalid=16361, Unknown=0, NotChecked=0, Total=19740 [2022-11-20 11:23:10,537 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 452 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:23:10,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 386 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:23:10,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-11-20 11:23:11,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 97. [2022-11-20 11:23:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:11,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:23:11,330 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:23:11,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:23:11,330 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:23:11,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.152542372881356) internal successors, (127), 59 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:23:11,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:23:11,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:23:11,331 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:23:11,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-11-20 11:23:11,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-11-20 11:23:11,531 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:23:11,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:23:11,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683524, now seen corresponding path program 89 times [2022-11-20 11:23:11,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:23:11,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256919595] [2022-11-20 11:23:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:23:11,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:23:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:23:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 261 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:12,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:23:12,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256919595] [2022-11-20 11:23:12,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256919595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:23:12,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284123533] [2022-11-20 11:23:12,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:23:12,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:23:12,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:23:12,209 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:23:12,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-11-20 11:23:12,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-11-20 11:23:12,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:23:12,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:23:12,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:23:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:13,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:23:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 301 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:13,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284123533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:23:13,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:23:13,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 58 [2022-11-20 11:23:13,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506935008] [2022-11-20 11:23:13,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:23:13,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 11:23:13,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:23:13,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 11:23:13,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2701, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 11:23:13,827 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:23:24,019 INFO L93 Difference]: Finished difference Result 823 states and 852 transitions. [2022-11-20 11:23:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-20 11:23:24,019 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:23:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:23:24,020 INFO L225 Difference]: With dead ends: 823 [2022-11-20 11:23:24,020 INFO L226 Difference]: Without dead ends: 774 [2022-11-20 11:23:24,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 80 SyntacticMatches, 31 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7395 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3049, Invalid=14773, Unknown=0, NotChecked=0, Total=17822 [2022-11-20 11:23:24,021 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 623 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:23:24,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 342 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:23:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-20 11:23:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 97. [2022-11-20 11:23:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:23:24,816 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:23:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:23:24,816 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:23:24,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 58 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:23:24,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:23:24,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:23:24,817 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:23:24,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-11-20 11:23:25,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:23:25,020 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:23:25,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:23:25,020 INFO L85 PathProgramCache]: Analyzing trace with hash -43658595, now seen corresponding path program 90 times [2022-11-20 11:23:25,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:23:25,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798908814] [2022-11-20 11:23:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:23:25,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:23:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:23:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 261 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:25,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:23:25,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798908814] [2022-11-20 11:23:25,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798908814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:23:25,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372789147] [2022-11-20 11:23:25,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:23:25,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:23:25,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:23:25,614 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:23:25,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-11-20 11:23:25,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-20 11:23:25,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:23:25,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:23:25,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:23:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:26,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:23:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 301 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:27,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372789147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:23:27,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:23:27,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2022-11-20 11:23:27,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390042813] [2022-11-20 11:23:27,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:23:27,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-20 11:23:27,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:23:27,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-20 11:23:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 11:23:27,208 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:23:37,720 INFO L93 Difference]: Finished difference Result 873 states and 903 transitions. [2022-11-20 11:23:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-20 11:23:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:23:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:23:37,721 INFO L225 Difference]: With dead ends: 873 [2022-11-20 11:23:37,721 INFO L226 Difference]: Without dead ends: 824 [2022-11-20 11:23:37,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 81 SyntacticMatches, 31 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6377 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2661, Invalid=12839, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 11:23:37,722 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 494 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:23:37,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 411 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:23:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-11-20 11:23:38,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 97. [2022-11-20 11:23:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:23:38,560 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:23:38,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:23:38,560 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:23:38,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 57 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:23:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:23:38,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:23:38,561 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:23:38,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-11-20 11:23:38,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:23:38,762 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:23:38,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:23:38,762 INFO L85 PathProgramCache]: Analyzing trace with hash -559169700, now seen corresponding path program 91 times [2022-11-20 11:23:38,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:23:38,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463784488] [2022-11-20 11:23:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:23:38,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:23:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:23:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 261 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:39,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:23:39,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463784488] [2022-11-20 11:23:39,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463784488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:23:39,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622345051] [2022-11-20 11:23:39,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:23:39,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:23:39,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:23:39,359 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:23:39,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-11-20 11:23:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:23:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:23:39,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:23:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:40,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:23:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 301 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:40,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622345051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:23:40,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:23:40,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 56 [2022-11-20 11:23:40,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000009795] [2022-11-20 11:23:40,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:23:40,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 11:23:40,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:23:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 11:23:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 11:23:40,993 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:23:51,492 INFO L93 Difference]: Finished difference Result 922 states and 953 transitions. [2022-11-20 11:23:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-20 11:23:51,493 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:23:51,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:23:51,494 INFO L225 Difference]: With dead ends: 922 [2022-11-20 11:23:51,494 INFO L226 Difference]: Without dead ends: 873 [2022-11-20 11:23:51,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 82 SyntacticMatches, 31 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5194 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2242, Invalid=10640, Unknown=0, NotChecked=0, Total=12882 [2022-11-20 11:23:51,495 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 680 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:23:51,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 371 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:23:51,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-11-20 11:23:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 97. [2022-11-20 11:23:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2022-11-20 11:23:52,442 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 67 [2022-11-20 11:23:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:23:52,442 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2022-11-20 11:23:52,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:23:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2022-11-20 11:23:52,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 11:23:52,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:23:52,443 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:23:52,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-11-20 11:23:52,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-11-20 11:23:52,643 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:23:52,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:23:52,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1129988419, now seen corresponding path program 14 times [2022-11-20 11:23:52,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:23:52,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552509774] [2022-11-20 11:23:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:23:52,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:23:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:23:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:53,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:23:53,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552509774] [2022-11-20 11:23:53,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552509774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:23:53,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094720621] [2022-11-20 11:23:53,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:23:53,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:23:53,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:23:53,276 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:23:53,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-11-20 11:23:53,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:23:53,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:23:53,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:23:53,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:23:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:54,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:23:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:23:54,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094720621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:23:54,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:23:54,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 55 [2022-11-20 11:23:54,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291308086] [2022-11-20 11:23:54,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:23:54,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 11:23:54,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:23:54,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 11:23:54,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2359, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 11:23:54,873 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:05,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:05,760 INFO L93 Difference]: Finished difference Result 973 states and 1006 transitions. [2022-11-20 11:24:05,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 11:24:05,760 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 11:24:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:05,761 INFO L225 Difference]: With dead ends: 973 [2022-11-20 11:24:05,761 INFO L226 Difference]: Without dead ends: 924 [2022-11-20 11:24:05,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 83 SyntacticMatches, 31 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1841, Invalid=8259, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 11:24:05,762 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 537 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:05,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 356 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:24:05,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-20 11:24:06,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 99. [2022-11-20 11:24:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.183673469387755) internal successors, (116), 98 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-11-20 11:24:06,592 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 67 [2022-11-20 11:24:06,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:06,592 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-11-20 11:24:06,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.2363636363636363) internal successors, (123), 55 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:06,593 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-11-20 11:24:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 11:24:06,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:06,593 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:06,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-11-20 11:24:06,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:06,794 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:06,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:06,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1945821609, now seen corresponding path program 28 times [2022-11-20 11:24:06,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:06,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928285446] [2022-11-20 11:24:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:06,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:07,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:07,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928285446] [2022-11-20 11:24:07,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928285446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:07,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741573814] [2022-11-20 11:24:07,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:24:07,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:07,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:07,097 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:07,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-11-20 11:24:07,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:24:07,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:07,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:24:07,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:07,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:07,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741573814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:07,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:07,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2022-11-20 11:24:07,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070146388] [2022-11-20 11:24:07,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:07,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 11:24:07,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:07,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 11:24:07,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:24:07,619 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:09,013 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2022-11-20 11:24:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 11:24:09,014 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-20 11:24:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:09,014 INFO L225 Difference]: With dead ends: 110 [2022-11-20 11:24:09,014 INFO L226 Difference]: Without dead ends: 108 [2022-11-20 11:24:09,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 118 SyntacticMatches, 30 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:24:09,015 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 106 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:09,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 242 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:24:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-20 11:24:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2022-11-20 11:24:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-11-20 11:24:09,825 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 68 [2022-11-20 11:24:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:09,825 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-11-20 11:24:09,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-11-20 11:24:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:24:09,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:09,826 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:09,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:10,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-11-20 11:24:10,026 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:10,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:10,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1206883513, now seen corresponding path program 29 times [2022-11-20 11:24:10,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:10,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990372909] [2022-11-20 11:24:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:10,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:10,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:10,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990372909] [2022-11-20 11:24:10,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990372909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:10,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203586593] [2022-11-20 11:24:10,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:24:10,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:10,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:10,751 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:10,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-11-20 11:24:10,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-20 11:24:10,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:10,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:24:10,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:12,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:12,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203586593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:12,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:12,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2022-11-20 11:24:12,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437411686] [2022-11-20 11:24:12,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:12,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-20 11:24:12,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:12,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-20 11:24:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=4259, Unknown=0, NotChecked=0, Total=5256 [2022-11-20 11:24:12,932 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:16,197 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2022-11-20 11:24:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 11:24:16,197 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 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 71 [2022-11-20 11:24:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:16,198 INFO L225 Difference]: With dead ends: 220 [2022-11-20 11:24:16,198 INFO L226 Difference]: Without dead ends: 168 [2022-11-20 11:24:16,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 73 SyntacticMatches, 33 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5996 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2072, Invalid=9270, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 11:24:16,198 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:16,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 308 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:24:16,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-20 11:24:17,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 103. [2022-11-20 11:24:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:17,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:24:17,162 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:24:17,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:17,162 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:24:17,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:17,162 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:24:17,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:24:17,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:17,163 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:17,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-11-20 11:24:17,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-11-20 11:24:17,363 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:17,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:17,363 INFO L85 PathProgramCache]: Analyzing trace with hash -962976904, now seen corresponding path program 92 times [2022-11-20 11:24:17,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:17,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310381532] [2022-11-20 11:24:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:17,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 302 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:18,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:18,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310381532] [2022-11-20 11:24:18,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310381532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:18,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267667347] [2022-11-20 11:24:18,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:24:18,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:18,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:18,095 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:18,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-11-20 11:24:18,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:24:18,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:18,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:24:18,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:19,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:20,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267667347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:20,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:20,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 72 [2022-11-20 11:24:20,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344521133] [2022-11-20 11:24:20,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:20,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-20 11:24:20,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:20,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-20 11:24:20,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=4164, Unknown=0, NotChecked=0, Total=5112 [2022-11-20 11:24:20,219 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:24,945 INFO L93 Difference]: Finished difference Result 285 states and 305 transitions. [2022-11-20 11:24:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 11:24:24,945 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 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 71 [2022-11-20 11:24:24,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:24,945 INFO L225 Difference]: With dead ends: 285 [2022-11-20 11:24:24,945 INFO L226 Difference]: Without dead ends: 233 [2022-11-20 11:24:24,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 74 SyntacticMatches, 33 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7058 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2530, Invalid=11990, Unknown=0, NotChecked=0, Total=14520 [2022-11-20 11:24:24,946 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:24,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 377 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:24:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-20 11:24:25,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 103. [2022-11-20 11:24:25,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:25,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:24:25,852 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:24:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:25,852 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:24:25,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:25,853 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:24:25,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:24:25,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:25,853 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:25,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:26,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-11-20 11:24:26,059 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1460879577, now seen corresponding path program 93 times [2022-11-20 11:24:26,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:26,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329139136] [2022-11-20 11:24:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:26,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 302 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:26,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:26,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329139136] [2022-11-20 11:24:26,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329139136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:26,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587571138] [2022-11-20 11:24:26,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:24:26,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:26,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:26,726 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:26,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-11-20 11:24:26,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-20 11:24:26,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:24:26,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:28,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:28,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587571138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:28,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:28,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 71 [2022-11-20 11:24:28,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97181554] [2022-11-20 11:24:28,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:28,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-20 11:24:28,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:28,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-20 11:24:28,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=4067, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 11:24:28,695 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:34,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:34,527 INFO L93 Difference]: Finished difference Result 349 states and 370 transitions. [2022-11-20 11:24:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-20 11:24:34,527 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 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 71 [2022-11-20 11:24:34,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:34,528 INFO L225 Difference]: With dead ends: 349 [2022-11-20 11:24:34,528 INFO L226 Difference]: Without dead ends: 297 [2022-11-20 11:24:34,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 75 SyntacticMatches, 33 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8102 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3015, Invalid=14541, Unknown=0, NotChecked=0, Total=17556 [2022-11-20 11:24:34,530 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 219 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:34,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 345 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:24:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-20 11:24:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 103. [2022-11-20 11:24:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:24:35,573 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:24:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:35,573 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:24:35,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:24:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:24:35,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:35,574 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:35,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-11-20 11:24:35,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:35,774 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:35,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1816163160, now seen corresponding path program 94 times [2022-11-20 11:24:35,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:35,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720852714] [2022-11-20 11:24:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:35,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 302 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:36,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:36,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720852714] [2022-11-20 11:24:36,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720852714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:36,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682928479] [2022-11-20 11:24:36,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:24:36,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:36,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:36,505 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:36,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-11-20 11:24:36,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:24:36,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:36,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:24:36,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:37,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:38,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682928479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:38,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:38,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 70 [2022-11-20 11:24:38,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445101675] [2022-11-20 11:24:38,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:38,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-20 11:24:38,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:38,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-20 11:24:38,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=3968, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 11:24:38,560 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:45,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:45,435 INFO L93 Difference]: Finished difference Result 412 states and 434 transitions. [2022-11-20 11:24:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-20 11:24:45,435 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 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 71 [2022-11-20 11:24:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:45,436 INFO L225 Difference]: With dead ends: 412 [2022-11-20 11:24:45,436 INFO L226 Difference]: Without dead ends: 360 [2022-11-20 11:24:45,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 76 SyntacticMatches, 33 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9065 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3474, Invalid=16832, Unknown=0, NotChecked=0, Total=20306 [2022-11-20 11:24:45,437 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 253 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:45,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 408 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:24:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-20 11:24:46,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 103. [2022-11-20 11:24:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:24:46,409 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:24:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:46,410 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:24:46,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:24:46,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:24:46,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:46,410 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:46,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-11-20 11:24:46,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:46,611 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:46,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2104718585, now seen corresponding path program 95 times [2022-11-20 11:24:46,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:46,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082014862] [2022-11-20 11:24:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:46,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 302 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:47,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:47,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082014862] [2022-11-20 11:24:47,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082014862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:47,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060745535] [2022-11-20 11:24:47,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:24:47,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:47,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:47,244 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:47,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-11-20 11:24:47,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-20 11:24:47,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:47,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:24:47,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:24:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:48,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:24:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:49,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060745535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:24:49,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:24:49,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 69 [2022-11-20 11:24:49,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197698481] [2022-11-20 11:24:49,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:24:49,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-20 11:24:49,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:24:49,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-20 11:24:49,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=3867, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 11:24:49,128 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:24:57,423 INFO L93 Difference]: Finished difference Result 474 states and 497 transitions. [2022-11-20 11:24:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-20 11:24:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 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 71 [2022-11-20 11:24:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:24:57,424 INFO L225 Difference]: With dead ends: 474 [2022-11-20 11:24:57,424 INFO L226 Difference]: Without dead ends: 422 [2022-11-20 11:24:57,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 77 SyntacticMatches, 33 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9902 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3877, Invalid=18773, Unknown=0, NotChecked=0, Total=22650 [2022-11-20 11:24:57,425 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 287 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:24:57,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 389 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:24:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-20 11:24:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 103. [2022-11-20 11:24:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:24:58,427 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:24:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:24:58,427 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:24:58,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:24:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:24:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:24:58,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:24:58,427 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:24:58,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-11-20 11:24:58,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-11-20 11:24:58,628 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:24:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:24:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1559837496, now seen corresponding path program 96 times [2022-11-20 11:24:58,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:24:58,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251318855] [2022-11-20 11:24:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:24:58,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:24:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:24:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 302 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:24:59,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:24:59,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251318855] [2022-11-20 11:24:59,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251318855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:24:59,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342002296] [2022-11-20 11:24:59,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:24:59,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:24:59,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:24:59,284 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:24:59,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-11-20 11:24:59,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-20 11:24:59,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:24:59,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:24:59,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:00,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:25:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:01,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342002296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:25:01,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:25:01,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 68 [2022-11-20 11:25:01,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681894749] [2022-11-20 11:25:01,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:25:01,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 11:25:01,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:01,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 11:25:01,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=3764, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 11:25:01,231 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:10,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:10,935 INFO L93 Difference]: Finished difference Result 535 states and 559 transitions. [2022-11-20 11:25:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-20 11:25:10,936 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 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 71 [2022-11-20 11:25:10,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:10,936 INFO L225 Difference]: With dead ends: 535 [2022-11-20 11:25:10,936 INFO L226 Difference]: Without dead ends: 483 [2022-11-20 11:25:10,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 78 SyntacticMatches, 33 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10563 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4200, Invalid=20292, Unknown=0, NotChecked=0, Total=24492 [2022-11-20 11:25:10,938 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 355 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:10,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 403 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:25:10,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-20 11:25:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 103. [2022-11-20 11:25:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:25:12,122 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:25:12,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:12,122 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:25:12,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:12,123 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:25:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:25:12,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:12,123 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:25:12,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-11-20 11:25:12,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:12,324 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:25:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash -258854631, now seen corresponding path program 97 times [2022-11-20 11:25:12,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:12,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016670847] [2022-11-20 11:25:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:12,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 302 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:13,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:13,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016670847] [2022-11-20 11:25:13,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016670847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:25:13,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653329385] [2022-11-20 11:25:13,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:25:13,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:13,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:25:13,094 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:25:13,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-11-20 11:25:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:13,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:25:13,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:14,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:25:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:15,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653329385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:25:15,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:25:15,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 67 [2022-11-20 11:25:15,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054057543] [2022-11-20 11:25:15,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:25:15,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-20 11:25:15,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:15,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-20 11:25:15,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3659, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 11:25:15,248 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:26,968 INFO L93 Difference]: Finished difference Result 595 states and 620 transitions. [2022-11-20 11:25:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-20 11:25:26,968 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 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 71 [2022-11-20 11:25:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:26,969 INFO L225 Difference]: With dead ends: 595 [2022-11-20 11:25:26,969 INFO L226 Difference]: Without dead ends: 543 [2022-11-20 11:25:26,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 79 SyntacticMatches, 33 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11010 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4425, Invalid=21335, Unknown=0, NotChecked=0, Total=25760 [2022-11-20 11:25:26,972 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 584 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:26,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 263 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:25:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-11-20 11:25:28,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 103. [2022-11-20 11:25:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:25:28,032 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:25:28,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:28,032 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:25:28,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:25:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:25:28,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:28,032 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:25:28,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-11-20 11:25:28,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:28,233 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:25:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1425900776, now seen corresponding path program 98 times [2022-11-20 11:25:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:28,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925997107] [2022-11-20 11:25:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:28,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 302 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:28,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:28,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925997107] [2022-11-20 11:25:28,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925997107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:25:28,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166857041] [2022-11-20 11:25:28,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:25:28,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:28,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:25:28,864 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:25:28,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-11-20 11:25:28,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:25:28,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:25:28,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:25:28,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:30,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:25:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:30,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166857041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:25:30,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:25:30,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 66 [2022-11-20 11:25:30,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803758726] [2022-11-20 11:25:30,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:25:30,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:25:30,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:30,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:25:30,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=3552, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:25:30,655 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:41,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:41,468 INFO L93 Difference]: Finished difference Result 654 states and 680 transitions. [2022-11-20 11:25:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-20 11:25:41,468 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 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 71 [2022-11-20 11:25:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:41,469 INFO L225 Difference]: With dead ends: 654 [2022-11-20 11:25:41,469 INFO L226 Difference]: Without dead ends: 602 [2022-11-20 11:25:41,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 80 SyntacticMatches, 33 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11217 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4540, Invalid=21866, Unknown=0, NotChecked=0, Total=26406 [2022-11-20 11:25:41,470 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 416 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:41,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 391 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:25:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-11-20 11:25:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 103. [2022-11-20 11:25:42,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:42,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:25:42,433 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:25:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:42,433 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:25:42,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:42,433 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:25:42,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:25:42,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:42,433 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:25:42,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-11-20 11:25:42,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:42,634 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:25:42,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:42,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1584493881, now seen corresponding path program 99 times [2022-11-20 11:25:42,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:42,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193748741] [2022-11-20 11:25:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:42,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 302 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:43,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:43,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193748741] [2022-11-20 11:25:43,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193748741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:25:43,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080735932] [2022-11-20 11:25:43,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:25:43,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:43,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:25:43,279 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:25:43,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-11-20 11:25:43,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-20 11:25:43,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:25:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:25:43,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:44,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:25:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 345 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:45,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080735932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:25:45,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:25:45,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 65 [2022-11-20 11:25:45,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133205089] [2022-11-20 11:25:45,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:25:45,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-20 11:25:45,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:45,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-20 11:25:45,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=3443, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 11:25:45,051 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:56,720 INFO L93 Difference]: Finished difference Result 712 states and 739 transitions. [2022-11-20 11:25:56,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-20 11:25:56,720 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 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 71 [2022-11-20 11:25:56,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:56,721 INFO L225 Difference]: With dead ends: 712 [2022-11-20 11:25:56,721 INFO L226 Difference]: Without dead ends: 660 [2022-11-20 11:25:56,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 81 SyntacticMatches, 33 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11170 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4539, Invalid=21867, Unknown=0, NotChecked=0, Total=26406 [2022-11-20 11:25:56,722 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 456 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:56,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 391 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:25:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-11-20 11:25:57,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 103. [2022-11-20 11:25:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:57,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:25:57,988 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:25:57,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:57,989 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:25:57,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:57,989 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:25:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:25:57,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:57,989 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:25:57,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-11-20 11:25:58,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:58,190 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:25:58,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:58,190 INFO L85 PathProgramCache]: Analyzing trace with hash -535153928, now seen corresponding path program 100 times [2022-11-20 11:25:58,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:58,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986505381] [2022-11-20 11:25:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:58,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 302 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:58,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:58,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986505381] [2022-11-20 11:25:58,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986505381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:25:58,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263242514] [2022-11-20 11:25:58,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:25:58,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:58,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:25:58,811 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:25:58,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-11-20 11:25:58,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:25:58,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:25:58,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:25:58,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:25:59,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 345 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:00,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263242514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:00,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:26:00,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 64 [2022-11-20 11:26:00,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689888518] [2022-11-20 11:26:00,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:00,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 11:26:00,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:26:00,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 11:26:00,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=3332, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 11:26:00,572 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:12,597 INFO L93 Difference]: Finished difference Result 769 states and 797 transitions. [2022-11-20 11:26:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-20 11:26:12,597 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 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 71 [2022-11-20 11:26:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:12,598 INFO L225 Difference]: With dead ends: 769 [2022-11-20 11:26:12,599 INFO L226 Difference]: Without dead ends: 717 [2022-11-20 11:26:12,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 82 SyntacticMatches, 33 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10863 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4422, Invalid=21338, Unknown=0, NotChecked=0, Total=25760 [2022-11-20 11:26:12,600 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 624 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:12,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 374 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:26:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-11-20 11:26:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 103. [2022-11-20 11:26:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:26:13,613 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:26:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:13,613 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:26:13,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:26:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:26:13,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:13,613 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:13,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-11-20 11:26:13,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-11-20 11:26:13,814 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:26:13,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:13,814 INFO L85 PathProgramCache]: Analyzing trace with hash 227754329, now seen corresponding path program 101 times [2022-11-20 11:26:13,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:26:13,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206143301] [2022-11-20 11:26:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:13,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:26:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 302 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:14,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:26:14,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206143301] [2022-11-20 11:26:14,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206143301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:26:14,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963819866] [2022-11-20 11:26:14,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:26:14,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:26:14,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:26:14,483 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:26:14,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-11-20 11:26:14,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-20 11:26:14,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:26:14,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:26:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:15,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 345 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:16,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963819866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:16,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:26:16,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 63 [2022-11-20 11:26:16,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72342511] [2022-11-20 11:26:16,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:16,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-20 11:26:16,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:26:16,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-20 11:26:16,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=3219, Unknown=0, NotChecked=0, Total=3906 [2022-11-20 11:26:16,123 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:28,518 INFO L93 Difference]: Finished difference Result 825 states and 854 transitions. [2022-11-20 11:26:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-20 11:26:28,519 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 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 71 [2022-11-20 11:26:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:28,519 INFO L225 Difference]: With dead ends: 825 [2022-11-20 11:26:28,519 INFO L226 Difference]: Without dead ends: 773 [2022-11-20 11:26:28,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 83 SyntacticMatches, 33 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10298 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4195, Invalid=20297, Unknown=0, NotChecked=0, Total=24492 [2022-11-20 11:26:28,521 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 647 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:28,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 384 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:26:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-11-20 11:26:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 103. [2022-11-20 11:26:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:26:29,507 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:26:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:29,507 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:26:29,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:26:29,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:26:29,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:29,508 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:29,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-11-20 11:26:29,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-11-20 11:26:29,708 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:26:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash -578919720, now seen corresponding path program 102 times [2022-11-20 11:26:29,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:26:29,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854722731] [2022-11-20 11:26:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:29,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:26:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 302 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:30,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:26:30,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854722731] [2022-11-20 11:26:30,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854722731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:26:30,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257195082] [2022-11-20 11:26:30,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:26:30,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:26:30,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:26:30,340 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:26:30,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-11-20 11:26:30,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-20 11:26:30,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:26:30,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:26:30,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:31,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 345 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:32,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257195082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:32,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:26:32,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 62 [2022-11-20 11:26:32,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691242614] [2022-11-20 11:26:32,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:32,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-20 11:26:32,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:26:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-20 11:26:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3104, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 11:26:32,055 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:44,772 INFO L93 Difference]: Finished difference Result 880 states and 910 transitions. [2022-11-20 11:26:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-20 11:26:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 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 71 [2022-11-20 11:26:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:44,774 INFO L225 Difference]: With dead ends: 880 [2022-11-20 11:26:44,774 INFO L226 Difference]: Without dead ends: 828 [2022-11-20 11:26:44,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 84 SyntacticMatches, 33 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9489 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3870, Invalid=18780, Unknown=0, NotChecked=0, Total=22650 [2022-11-20 11:26:44,776 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 625 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:44,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 398 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:26:44,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-11-20 11:26:45,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 103. [2022-11-20 11:26:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:26:45,860 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:26:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:45,860 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:26:45,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.161290322580645) internal successors, (134), 62 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:26:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:26:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:26:45,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:45,861 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:26:45,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-11-20 11:26:46,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-11-20 11:26:46,061 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:26:46,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:46,061 INFO L85 PathProgramCache]: Analyzing trace with hash -50752135, now seen corresponding path program 103 times [2022-11-20 11:26:46,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:26:46,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681966593] [2022-11-20 11:26:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:46,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:26:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 302 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:46,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:26:46,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681966593] [2022-11-20 11:26:46,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681966593] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:26:46,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686612756] [2022-11-20 11:26:46,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:26:46,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:26:46,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:26:46,718 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:26:46,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-11-20 11:26:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:46,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:26:46,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:47,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 345 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:26:48,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686612756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:26:48,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:26:48,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 61 [2022-11-20 11:26:48,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599665306] [2022-11-20 11:26:48,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:48,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-20 11:26:48,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:26:48,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-20 11:26:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=2987, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 11:26:48,403 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:02,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:02,193 INFO L93 Difference]: Finished difference Result 934 states and 965 transitions. [2022-11-20 11:27:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-20 11:27:02,194 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 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 71 [2022-11-20 11:27:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:02,195 INFO L225 Difference]: With dead ends: 934 [2022-11-20 11:27:02,195 INFO L226 Difference]: Without dead ends: 882 [2022-11-20 11:27:02,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 85 SyntacticMatches, 33 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8462 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3465, Invalid=16841, Unknown=0, NotChecked=0, Total=20306 [2022-11-20 11:27:02,196 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 647 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:02,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 425 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:27:02,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-11-20 11:27:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 103. [2022-11-20 11:27:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:27:03,298 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:27:03,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:03,299 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:27:03,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.180327868852459) internal successors, (133), 61 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:03,299 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:27:03,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:27:03,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:03,299 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:03,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-11-20 11:27:03,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-11-20 11:27:03,500 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:27:03,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1142093128, now seen corresponding path program 104 times [2022-11-20 11:27:03,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:27:03,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188398873] [2022-11-20 11:27:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:03,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:27:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 302 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:04,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:27:04,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188398873] [2022-11-20 11:27:04,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188398873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:27:04,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743986812] [2022-11-20 11:27:04,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:27:04,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:27:04,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:27:04,159 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:27:04,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-11-20 11:27:04,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:27:04,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:27:04,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:27:04,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:05,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 345 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:05,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743986812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:05,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:27:05,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 60 [2022-11-20 11:27:05,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360266298] [2022-11-20 11:27:05,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:05,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-20 11:27:05,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:27:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-20 11:27:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=2868, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 11:27:05,749 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:19,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:19,500 INFO L93 Difference]: Finished difference Result 987 states and 1019 transitions. [2022-11-20 11:27:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-20 11:27:19,500 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 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 71 [2022-11-20 11:27:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:19,501 INFO L225 Difference]: With dead ends: 987 [2022-11-20 11:27:19,501 INFO L226 Difference]: Without dead ends: 935 [2022-11-20 11:27:19,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 86 SyntacticMatches, 33 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7255 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3004, Invalid=14552, Unknown=0, NotChecked=0, Total=17556 [2022-11-20 11:27:19,502 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 726 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:19,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 423 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:27:19,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-11-20 11:27:20,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 103. [2022-11-20 11:27:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:27:20,643 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:27:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:20,644 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:27:20,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:27:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:27:20,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:20,645 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:20,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-11-20 11:27:20,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-11-20 11:27:20,850 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:27:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash 69628313, now seen corresponding path program 105 times [2022-11-20 11:27:20,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:27:20,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324561966] [2022-11-20 11:27:20,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:20,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:27:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 302 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:21,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:27:21,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324561966] [2022-11-20 11:27:21,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324561966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:27:21,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300611244] [2022-11-20 11:27:21,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:27:21,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:27:21,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:27:21,507 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:27:21,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-11-20 11:27:21,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-20 11:27:21,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:27:21,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:27:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:22,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:23,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300611244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:23,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:27:23,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 59 [2022-11-20 11:27:23,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351320523] [2022-11-20 11:27:23,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:23,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 11:27:23,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:27:23,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 11:27:23,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=2747, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 11:27:23,081 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:37,090 INFO L93 Difference]: Finished difference Result 1039 states and 1072 transitions. [2022-11-20 11:27:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-20 11:27:37,090 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 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 71 [2022-11-20 11:27:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:37,091 INFO L225 Difference]: With dead ends: 1039 [2022-11-20 11:27:37,091 INFO L226 Difference]: Without dead ends: 987 [2022-11-20 11:27:37,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 87 SyntacticMatches, 33 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5884 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2517, Invalid=12003, Unknown=0, NotChecked=0, Total=14520 [2022-11-20 11:27:37,092 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 570 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:37,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 456 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:27:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-11-20 11:27:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 103. [2022-11-20 11:27:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1764705882352942) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-11-20 11:27:38,145 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 71 [2022-11-20 11:27:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:38,145 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-11-20 11:27:38,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-11-20 11:27:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:27:38,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:38,145 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:38,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-11-20 11:27:38,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:27:38,346 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:27:38,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:38,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1415304552, now seen corresponding path program 15 times [2022-11-20 11:27:38,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:27:38,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094419837] [2022-11-20 11:27:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:38,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:27:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:38,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:27:38,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094419837] [2022-11-20 11:27:38,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094419837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:27:38,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360322634] [2022-11-20 11:27:38,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:27:38,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:27:38,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:27:38,982 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:27:38,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-11-20 11:27:39,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-20 11:27:39,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:27:39,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 11:27:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:39,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:40,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360322634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:40,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:27:40,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 58 [2022-11-20 11:27:40,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130684131] [2022-11-20 11:27:40,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:40,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 11:27:40,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:27:40,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 11:27:40,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=2624, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 11:27:40,517 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:55,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:55,009 INFO L93 Difference]: Finished difference Result 1093 states and 1128 transitions. [2022-11-20 11:27:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-20 11:27:55,009 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 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 71 [2022-11-20 11:27:55,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:55,010 INFO L225 Difference]: With dead ends: 1093 [2022-11-20 11:27:55,010 INFO L226 Difference]: Without dead ends: 1041 [2022-11-20 11:27:55,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 88 SyntacticMatches, 33 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4484 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2057, Invalid=9285, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 11:27:55,011 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 656 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:55,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 316 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:27:55,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-11-20 11:27:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 105. [2022-11-20 11:27:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 104 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2022-11-20 11:27:56,148 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 71 [2022-11-20 11:27:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:56,148 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2022-11-20 11:27:56,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2022-11-20 11:27:56,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 11:27:56,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:56,149 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:56,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-11-20 11:27:56,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:27:56,351 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:27:56,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:56,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1329099827, now seen corresponding path program 30 times [2022-11-20 11:27:56,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:27:56,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242648190] [2022-11-20 11:27:56,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:56,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:27:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:56,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:27:56,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242648190] [2022-11-20 11:27:56,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242648190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:27:56,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044373491] [2022-11-20 11:27:56,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:27:56,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:27:56,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:27:56,708 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:27:56,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-11-20 11:27:56,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-20 11:27:56,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:27:56,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:27:56,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:56,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:57,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044373491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:57,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:27:57,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2022-11-20 11:27:57,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791555093] [2022-11-20 11:27:57,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:57,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 11:27:57,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:27:57,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 11:27:57,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:27:57,298 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:27:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:59,065 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2022-11-20 11:27:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 11:27:59,066 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-20 11:27:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:59,066 INFO L225 Difference]: With dead ends: 116 [2022-11-20 11:27:59,067 INFO L226 Difference]: Without dead ends: 114 [2022-11-20 11:27:59,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 125 SyntacticMatches, 32 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:27:59,067 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 142 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:59,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 253 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:27:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-20 11:28:00,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2022-11-20 11:28:00,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2022-11-20 11:28:00,232 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 72 [2022-11-20 11:28:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:00,232 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2022-11-20 11:28:00,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2022-11-20 11:28:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 11:28:00,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:00,232 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:00,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-11-20 11:28:00,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:28:00,433 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:28:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:00,433 INFO L85 PathProgramCache]: Analyzing trace with hash -85712547, now seen corresponding path program 31 times [2022-11-20 11:28:00,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:28:00,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934442206] [2022-11-20 11:28:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:00,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:28:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:01,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:28:01,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934442206] [2022-11-20 11:28:01,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934442206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:01,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667772257] [2022-11-20 11:28:01,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:28:01,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:28:01,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:28:01,195 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:28:01,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-11-20 11:28:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:01,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:28:01,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:02,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:03,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667772257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:28:03,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:28:03,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 77 [2022-11-20 11:28:03,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127916129] [2022-11-20 11:28:03,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:03,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-20 11:28:03,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:28:03,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-20 11:28:03,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=4743, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 11:28:03,418 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:07,394 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2022-11-20 11:28:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 11:28:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-20 11:28:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:07,395 INFO L225 Difference]: With dead ends: 233 [2022-11-20 11:28:07,395 INFO L226 Difference]: Without dead ends: 178 [2022-11-20 11:28:07,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 77 SyntacticMatches, 35 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6737 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2301, Invalid=10355, Unknown=0, NotChecked=0, Total=12656 [2022-11-20 11:28:07,396 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 78 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:07,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 345 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:28:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-20 11:28:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2022-11-20 11:28:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-11-20 11:28:08,684 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 75 [2022-11-20 11:28:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:08,684 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-11-20 11:28:08,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:28:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-11-20 11:28:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 11:28:08,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:08,685 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:08,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-11-20 11:28:08,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:28:08,886 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:28:08,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:08,886 INFO L85 PathProgramCache]: Analyzing trace with hash -266651492, now seen corresponding path program 106 times [2022-11-20 11:28:08,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:28:08,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966932800] [2022-11-20 11:28:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:08,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:28:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 346 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:09,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:28:09,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966932800] [2022-11-20 11:28:09,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966932800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:09,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105427561] [2022-11-20 11:28:09,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:28:09,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:28:09,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:28:09,644 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:28:09,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7a812f-ad0e-4b94-86df-6be3db87ce72/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-11-20 11:28:09,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:28:09,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:09,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:28:09,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:11,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 392 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:28:11,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105427561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:28:11,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:28:11,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 76 [2022-11-20 11:28:11,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583309237] [2022-11-20 11:28:11,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:11,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-20 11:28:11,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:28:11,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-20 11:28:11,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=4643, Unknown=0, NotChecked=0, Total=5700 [2022-11-20 11:28:11,914 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)